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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 2727. Отображено 100.
16-02-2012 дата публикации

Hand-Held Power Tool

Номер: US20120036722A1
Автор: Achim Rethaber, Markus Hittmann, Ralf Schenk
Принадлежит: Andreas Stihl AG and Co KG

In a hand-held power tool with a drive motor and a clutch connected to the drive motor and having an output part, the drive pinion is fixedly connected to the output part of the clutch so as to be driven by the drive motor for driving a tool. The drive pinion has a first individual part and a second individual part that are fixedly connected to each other. The first individual part has a toothing and the second individual part is connected to the output part of the clutch.

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Номер записи: 1
15-03-2012 дата публикации

Hand-Held Power Tool

Номер: US20120060381A1
Автор:
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held power tool has a two-stroke engine with a cylinder with combustion chamber and a piston disposed therein that drives a crankshaft supported in a crankcase. In at least one piston position, crankcase and combustion chamber are connected by a transfer passage. An air passage supplies in at least one piston position combustion air to the transfer passage. A mixture passage for fuel/air mixture is provided. Air and mixture passages in operation are at least partially connected to each other. Part of the mixture passage is formed in a carburetor where a fuel port opens into the mixture passage. The mixture passage opens into the crankcase with a piston-controlled mixture inlet having a width in circumferential direction of the cylinder. Upon upward piston stroke the mixture inlet is connected to the crankcase with a portion of the width before a connection of air passage and transfer passage is established. 1. A hand-held power tool comprising:a two-stroke engine comprising a cylinder with a combustion chamber and a piston disposed in said cylinder and delimiting said combustion chamber;said two-stroke engine comprising a crankcase and a crankshaft that is rotatably supported in said crankcase and driven in rotation by said piston, wherein in at least one position of said piston said crankcase is connected by a transfer passage to said combustion chamber;said two-stroke engine comprising an air passage for supply of combustion air and a mixture passage for supply of fuel/air mixture, wherein said air passage and said mixture passage in operation are at least partially connected to each other;said two-stroke engine comprising a carburetor, wherein a section of said mixture passage is formed in said carburetor and wherein in said carburetor at least one fuel port is provided that opens into said mixture passage;wherein said air passage in at least one position of said piston supplies combustion air to said transfer passage;wherein said mixture passage has a ...

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Номер записи: 2
15-03-2012 дата публикации

Two-Stroke Engine

Номер: US20120060806A1
Автор:
Принадлежит: ANDREAS STIHL AG & CO. KG

A two-stroke engine has a cylinder having a cylinder bore with a combustion chamber and an outlet connected with the combustion chamber. A piston is disposed in the cylinder and delimits the combustion chamber. The piston has a piston recess. A crankcase is provided that has a crankshaft rotatably supported therein. The piston drives in rotation the crankshaft. In at least one position of the piston, the crankcase is connected by a transfer passage with the combustion chamber. An air passage is provided as well as a mixture passage that has a mixture inlet that is disposed at the cylinder bore and opens into the cylinder bore and is piston-controlled. The transfer passage is connected by the piston recess to the air passage when the piston is at top dead center. The piston recess has a connection to the mixture inlet in at least one position of the piston. 1. A two-stroke engine comprising:a cylinder having a cylinder bore with a combustion chamber and an outlet communicating with said combustion chamber;a piston disposed in said cylinder and delimiting said combustion chamber, wherein said piston has a piston recess;a crankcase having a crankshaft rotatably supported therein;wherein said piston drives in rotation said crankshaft;wherein said crankcase in at least one position of said piston is connected by a transfer passage with said combustion chamber;an air passage;a mixture passage having a mixture inlet that is disposed at said cylinder bore and opens into said cylinder bore and is piston-controlled by said piston;wherein said transfer passage is connected by said piston recess to said air passage when said piston is in an area of top dead center of said piston;said piston recess has a connection to said mixture inlet in at least one position of said piston.2. The two-stroke engine according to claim 1 , wherein said connection of said piston recess is at least partially realized when said piston recess is connected to said transfer passage.3. The two-stroke ...

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Номер записи: 3
19-04-2012 дата публикации

Carburetor

Номер: US20120091599A1
Автор: Kraus Alexander, Levien Patrick
Принадлежит: ANDREAS STIHL AG & CO. KG

A carburetor has a throttle element rotatably supported on a throttle shaft and a choke element rotatably supported on a choke shaft. A first coupling element is fixedly connected to the throttle shaft. A second coupling element is connected to the choke shaft. The first and second coupling elements define in a locked position a start position of throttle element and choke element. The locked position is released by rotation of the throttle shaft in opening direction of the throttle element. The locked position is released by rotation of the choke shaft in opening direction of the choke element. One of the first and second coupling elements is an at least partially elastic coupling element. Upon rotation of the choke shaft from the locked position into an open position, the elastic coupling element is elastically deformed and releases the locked position between the first and second coupling elements. 1. A carburetor comprising:a throttle element that is rotatably supported on a throttle shaft;a choke element that is rotatably supported on a choke shaft;a first coupling element that is fixedly connected to said throttle shaft;a second coupling element that is connected to said choke shaft;wherein said first coupling element and said second coupling element in at least one locked position define a start position of said throttle element and said choke element;wherein said at least one locked position is released by rotation of said throttle shaft in opening direction of said throttle element;wherein said at least one locked position is released by rotation of said choke shaft in opening direction of said choke element;wherein one of said first and said second coupling elements is an at least partially elastic coupling element;wherein, upon rotation of said choke shaft from said at least one locked position into an open position, said at least partially elastic coupling element is elastically deformed and releases said at least one locked position effected between ...

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Номер записи: 4
14-06-2012 дата публикации

Adjustment Safeguard

Номер: US20120146250A1
Автор: Baumhauer Joachim, Iwasa Yoshiharu, Kraus Alexander, Suzuki Daisuke
Принадлежит: ANDREAS STIHL AG & CO. KG

An adjustment safeguard for a set screw that is rotatably held in a housing has a cap that is non-rotatably secured on the head of the set screw. The cap is received in a sleeve of the housing and surrounded with minimal radial play by the sleeve that is essentially coaxially positioned relative to the cap. The cap is received with its axial length in the sleeve. The cap has a projection and the sleeve has a stop arranged in the interior of the sleeve. Projection and stop interact with each other in a rotational direction of the set screw. The cap has a top part and a separate bottom part. The bottom part is secured axially and non-rotatably on the head of the set screw. The bottom part engages with form fit the top part in the rotational direction and is axially connected to the top part. 1. An adjustment safeguard for a set screw that is rotatably held in a housing , the adjustment safeguard comprising:a cap that is non-rotatably secured on a head of the set screw;a sleeve fixedly connected to the housing;wherein the cap is received in the sleeve and surrounded with minimal radial play by the sleeve, wherein the sleeve is essentially coaxially positioned relative to the cap;wherein the cap has an axial length and the axial length of the cap is essentially received in the sleeve;wherein the cap has a projection;wherein the sleeve has a stop arranged in an interior of the sleeve;wherein the projection and the stop interact with each other in a rotational direction of the set screw;wherein the cap is comprised of a top part and a bottom part that is separate from the top part;wherein the bottom part is secured axially and non-rotatably on the head of the set screw;wherein the bottom part engages with form fit the top part in the rotational direction; andwherein the bottom part is axially connected to the top part.2. The adjustment safeguard according to claim 1 , wherein the top part has a mounting guide interacting with the stop claim 1 , wherein the mounting guide ...

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Номер записи: 5
23-08-2012 дата публикации

Hand-Held Power Tool

Номер: US20120211248A1
Автор: Reichler Mark, Uhl Klaus-Martin
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held power tool has a housing with a cylinder chamber. An internal combustion engine is arranged in the housing and the internal combustion engine has a cylinder arranged in the cylinder chamber. A device is provided that detects temperature information in the cylinder chamber when the internal combustion engine is in an inoperative state. An indicator device that indicates the temperature information is provided. 1. A hand-held power tool comprising:a housing having a cylinder chamber;an internal combustion engine arranged in said housing;said internal combustion engine comprising a cylinder arranged in said cylinder chamber;a device that detects temperature information in said cylinder chamber when said internal combustion engine is in an inoperative state;an indicator device that indicates said temperature information.2. The power tool according to claim 1 , wherein said temperature information indicates whether a temperature is above or below a temperature threshold value.3. The power tool according to claim 2 , wherein:said internal combustion engine is to be started below said switching temperature of said cylinder in a cold start adjustment and above said switching temperature in a warm start adjustment; andsaid device that detects said temperature information is arranged such on the power tool that, when said switching temperature exists at said cylinder, said temperature threshold value exists at said device that detects said temperature information.4. The power tool according to claim 1 , wherein said indicator device is visible from an exterior of said housing.5. The power tool according to claim 1 , wherein said device that detects said temperature information is integrated into said indicator device.6. The power tool according to claim 5 , wherein said device that detects said temperature information and said indicator device comprise a thermochromic material.7. The power tool according to claim 6 , wherein said device that detects said ...

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Номер записи: 6
20-09-2012 дата публикации

Blower Apparatus

Номер: US20120234412A1
Автор: Prager Andre
Принадлежит: ANDREAS STIHL AG & CO. KG

A blower apparatus has a drive motor and a blower device operatively connected to the drive motor. A blower tube is connected to the blower device and has an outlet opening remote from the blower device. A blower air stream conveyed by the blower device passes through the blower tube in the direction of a longitudinal center axis of the blower tube and exits through the outlet opening in an outflow direction. A pivoting device that pivots the blower tube is provided. In a non-actuated state of the pivoting device the outflow direction is parallel to the longitudinal center axis of the blower tube. The pivoting device has a tilting device that tilts the outflow direction relative to the longitudinal center axis of the blower tube and utilizes a transverse force that is generated by the blower air stream at the outlet opening for pivoting the blower tube. 1. A blower apparatus comprising:a drive motor;a blower device operatively connected to said drive motor;a blower tube connected with a first end to said blower device and having an outlet opening at a second end remote from said first end, wherein a blower air stream conveyed by said blower device passes through said blower tube in a direction of a longitudinal center axis of said blower tube and exits through said outlet opening in an outflow direction;a pivoting device configured to pivot said blower tube wherein in a non-actuated state of said pivoting device said outflow direction is parallel to said longitudinal center axis of said blower tube;wherein said pivoting device has a tilting device configured to tilt said outflow direction relative to said longitudinal center axis of said blower tube and utilizes a transverse force that is generated by said blower air stream at said outlet opening for pivoting said blower tube.2. The blower apparatus according to claim 1 , further comprising at least one adjustable flow guiding element that is arranged in said blower tube in an area of said outlet opening.3. The ...

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Номер записи: 7
20-09-2012 дата публикации

Hand-Held Power Tool

Номер: US20120234572A1
Автор: Drexler Steffen, Krätzig David, MANG Harald, Untermann Arne
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held power tool has a power tool housing made at least partially of plastic material. A drive motor is arranged in the power tool housing and a drive shaft driven connected to the drive motor is provided. A tool member is connected to the drive shaft and driven by the drive motor through the drive shaft. A first bearing rotatably supports the drive shaft relative to the power tool housing. An intermediate element supports the first bearing relative to the power tool housing. The intermediate element is arranged in a receptacle of the power tool housing and is supported on a support surface relative to the bottom of the receptacle. The support surface is less than approximately 50% of an imaginary circular ring surface defined between an outer circumference of the first bearing and the circumcircle of the receptacle. 1. A hand-held power tool comprising:a power tool housing comprised at least partially of plastic material;a drive motor arranged in said power tool housing;a drive shaft operatively connected to said drive motor;at least one tool member operatively connected to said drive shaft to be driven by said drive motor through said drive shaft;a first bearing rotatably supporting said drive shaft relative to said power tool housing;an intermediate element supporting said first bearing relative to said power tool housing;said intermediate element arranged in a receptacle of said power tool housing;said intermediate element supported on a support surface relative to a bottom of said receptacle;wherein said support surface is less than approximately 50% of an imaginary circular ring surface defined between an outer circumference of said first bearing and the circumcircle of said receptacle.2. The power tool according to claim 1 , wherein said support surface is less than approximately 30% of said imaginary circular ring surface.3. The power tool according to claim 1 , wherein said intermediate element is comprised of a first plastic material and said ...

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Номер записи: 8
18-10-2012 дата публикации

Arrangement of Power Tool and Carrying System

Номер: US20120261444A1
Автор: Behringer Patrick, Häberlein Jürgen, Hoche Florian
Принадлежит: ANDREAS STIHL AG & CO. KG

In an arrangement of a power tool and a carrying system, the carrying system has a support strap and a releasable fastening device for attaching the power tool to the support strap. The carrying system has an actuating device that actuates the releasable fastening device from a fastening position into a release position. The fastening device has a pivotable hook that in the fastening position is hooked to an eye and secures the power tool on the carrying system. When the carrying system is arranged on a user and the power tool is secured on the carrying system and the fastening device is actuated from the fastening position into the release position, the hook is pivoted such that the eye slides out of the hook because of the weight of the power tool. 1. An arrangement comprising:a power tool and a carrying system;wherein said carrying system comprises a support strap and a releasable fastening device for attaching said power tool to said support strap;wherein said carrying system comprises an actuating device that actuates said releasable fastening device from a fastening position into a release position;wherein said fastening device comprises a pivotable hook that in said fastening position is hooked to an eye and secures said power tool on said carrying system;wherein, when said carrying system is arranged on a user and said power tool is secured on said carrying system and said fastening device is actuated from said fastening position into said release position, said hook is pivoted such that said eye slides out of said hook because of the weight of said power tool.2. The arrangement according to claim 1 , wherein said hook is secured on said carrying strap and said eye is secured on said power tool.3. The arrangement according to claim 2 , wherein said hook has an inner contour on which said eye is resting and said inner contour has a support location where said eye is supported in said fastening position claim 2 , wherein said inner contour claim 2 , in said ...

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Номер записи: 9
22-11-2012 дата публикации

Portable Handheld Work Apparatus having an Internal Combustion Engine

Номер: US20120291725A1
Автор: Jan Kurzenberger, Sebastian Hänssler, Stefan Kummermehr, Thorsten Hecht
Принадлежит: Andreas Stihl AG and Co KG

In an internal combustion engine ( 2 ) of a portable handheld work apparatus, the cylinder ( 3 ) is provided with cooling ribs ( 4, 4′ ). A cooling airflow is generated by the fan wheel ( 13 ) and is guided over the cooling ribs. A carburetor ( 9 ) is temperaturized as required by the heated cooling air. A control of the cooling airflow to the carburetor ( 9 ) takes place in that an opening ( 11 ), which passes the heated cooling air, is selectively closed or opened via a closure element ( 12 ). In order to obtain improved cooling of the cylinder during summer operation as well as during winter operation, the closure element ( 12 ) is provided with at least one air guide wall which extends essentially transversely to the cooling airflow and causes this cooling air to be partially backed up and deflected.

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Номер записи: 10
18-04-2013 дата публикации

HANDHELD WORK APPARATUS HAVING A GUARD

Номер: US20130091715A1
Автор: Lank Jonas, Zimmermann Helmut
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus such as a stone cutter () having a housing () in which a drive motor () is arranged. The work apparatus has a tool driven by the drive motor () for cutting mineral or metallic materials. The housing () has a housing front end () facing the workpiece to be cut and arranged adjacent to the workpiece. The tool projects beyond the housing front end (). In order to avoid damage on the housing front end (), it is provided that an elastic guard (), which extends over at least 50% of the width (b) of the housing front end (), is arranged on the housing front end (). 1. A handheld work apparatus comprising:a housing having a housing front end having a width (b);a drive motor arranged in said housing;a tool for cutting at least one of mineral materials and metal materials;said housing front end being configured to face a workpiece to be cut and to be arranged adjacent to the workpiece during a cutting process;said tool being disposed so as to project beyond said housing front end;an elastic guard arranged on said housing front end and extending over at least 50% of said housing front end.2. The work apparatus of claim 1 , wherein said guard extends over at least 80% of said width (b) of said housing front end.3. The work apparatus of claim 2 , wherein said guard extends over the entirety of said width (b) of said housing front end.4. The work apparatus of claim 3 , wherein said housing front end defines a surface; and claim 3 , said guard extends over all of said surface of said housing front end.5. The work apparatus of claim 3 , wherein said guard completely covers said housing front end.6. The work apparatus of claim 1 , wherein said guard has a spray guard section which runs in an area below said tool.7. The work apparatus of claim 1 , wherein:said housing has a first longitudinal side and a second longitudinal side arranged opposite one another; and,said guard is held on said housing in a form-fitting manner on both said first and said second ...

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Номер записи: 11
09-05-2013 дата публикации

IGNITION DEVICE FOR A TWO-STROKE ENGINE

Номер: US20130112180A1
Автор: Maier Georg, Mandl Franz, Schieber Eberhard
Принадлежит: ANDREAS STIHL AG & CO. KG

The invention relates to an ignition device for triggering an ignition spark at a spark plug by way of an ignition generator. The latter includes a magnet wheel, which has two permanent magnets arranged at a spacing from each other in the peripheral direction and a magnetic yoke. The magnetic yoke carries a charging coil which charges an ignition capacitor, a primary coil and a secondary coil, connected, to the spark plug. During every passing of a permanent magnet, a voltage is induced in the coils, wherein, in order to trigger the ignition spark, the ignition capacitor is discharged via a switch element. In order to avoid an unwanted ignition at the bottom dead center of the piston, a device for reducing the voltage that occurs at the spark plug is provided. 1. An ignition device for triggering an ignition spark at a spark plug of a combustion engine having a crankshaft driven by a piston configured to move in a reciprocating manner between top dead center and bottom dead center , said ignition device comprising:a magnet wheel defining a periphery and being configured to be driven in rotation by the crankshaft of the combustion engine, said magnet wheel having a first permanent magnet and a second permanent magnet arranged on said magnet wheel at a distance from each other;an ignition capacitor;a yoke assembly including a magnetic yoke fixedly mounted at said periphery, a charging coil, a primary coil and a secondary coil;said charging coil being configured to charge said ignition capacitor;said secondary coil being connected to the spark plug;said magnet wheel having a first rotational angle region around the top dead center of the piston and a second rotational angle region around the bottom dead center of the piston;said magnet wheel being configured to magnetically close said yoke via said first permanent magnet in said first rotational angle region and to magnetically close said yoke via said second permanent magnet in said second rotational angle region;said ...

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Номер записи: 12
30-05-2013 дата публикации

HANDHELD WORK APPARATUS AND SUCTION HEAD FOR CONNECTION TO A FUEL LINE IN A HANDHELD WORK APPARATUS

Номер: US20130133620A1
Автор: Dietenberger Michael, Kinnen Arno, Layher Wolfgang, Mayer Felix, Tost Christopher
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus includes a fuel tank (), into which a flexible fuel line () projects. A suction head ( ) is arranged at the free end () of the fuel line (). The suction head is connected via the fuel line () to a fuel supply device () of an internal combustion engine () of the work apparatus. The suction head () has at least, one weight member (). The weight member () is formed at least partially as a magnet to achieve good cleaning of the fuel without a substantial increase in the weight of the work apparatus. 1. A hand-guided work apparatus comprising:an internal combustion engine;a fuel-metering device for metering fuel to said engine;a fuel tank for accommodating the fuel metered to said engine;a flexible fuel line projecting into said fuel tank and having a free end;a suction head arranged at said free end of said flexible fuel line and being connected to said fuel-metering device via said flexible fuel line; and,said suction head including at least one weight, member configured at least partly as a magnet.2. The work apparatus of claim 1 , wherein the suction head includes at least two weight members.3. The work apparatus of claim 1 , wherein at least one weight member is completely formed as a magnet.4. The work apparatus of claim 1 , wherein the suction head includes a cover.5. The work apparatus of claim 4 , wherein said cover includes an outlet port for fuel.6. The work apparatus of claim 4 , wherein said suction head includes a housing and an intermediate part arranged between said cover and said housing of said suction head; and claim 4 , said weight member is arranged on said intermediate part.7. The work apparatus of claim 6 , wherein said cover holds said weight member on said intermediate part.8. The work apparatus of claim 6 , wherein the intermediate part is connected via a first connection to said housing and via a second connection to said cover.9. The work apparatus of claim 8 , wherein the first connection includes first connecting ...

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Номер записи: 13
13-06-2013 дата публикации

METHOD FOR LEAK-TESTING AND DEVICE FOR CARRYING OUT THE METHOD

Номер: US20130145825A1
Автор: Kinnen Arno
Принадлежит: ANDREAS STIHL AG & CO. KG

A method for leak-testing a fuel supply system has been provided, wherein the fuel supply system comprises a fuel tank, a fuel injection valve, fuel lines between the fuel tank and the fuel valve, and a control valve controlled by a diaphragm, and wherein the diaphragm bounds a control chamber on one side, the method comprising: acting upon the portion of the fuel supply system upstream of the control valve with a predetermined pressure level, acting upon the side of the diaphragm facing away from the control chamber with a counterforce, wherein the counterforce is equal or greater to the predetermined pressure level. A device for leak-testing a fuel system according to the above method, wherein the device comprises a test pressure unit with at least one test pressure line, wherein said test pressure line is connectable to the fuel supply system. 1. A method for leak-testing a fuel supply system , wherein the fuel supply system comprises a fuel tank , a fuel injection valve , fuel lines between the fuel tank and the fuel valve , and a control valve controlled by a diaphragm , wherein the diaphragm bounds a control chamber on one side , wherein the control chamber is filled with fuel , and wherein the control valve closes when the pressure in the control chamber rises above a predetermined pressure , the method comprising:acting upon the portion of the fuel supply system upstream of the control valve with a predetermined pressure level,acting upon the side of the diaphragm facing away from the control chamber with a counterforce, wherein the counterforce is equal to or greater than the predetermined pressure level.2. The method according to claim 1 , wherein the counterforce is formed from a force component produced by a spring and from a further force component acting in the same direction on the diaphragm.3. The method according to claim 2 , wherein the further force component is applied to the diaphragm by a test pressure line connected to a sealed space bounded ...

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Номер записи: 14
13-06-2013 дата публикации

Internal combustion engine with fuel supply device

Номер: US20130146028A1
Автор: Dietenberger Michael, Kinnen Arno, Layher Wolfgang, Rieber Martin, Tost Christopher
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine has a fuel supply device, wherein the fuel supply device includes a fuel pump, a fuel pressure damper, an injection valve, and a fuel pressure regulator. The fuel pressure damper has a damper membrane separating a damper chamber and a damper back chamber from each other. The damper chamber of the fuel pressure damper is loaded with a first reference pressure. The fuel pressure regulator regulates a pressure of fuel supplied by the fuel pump to the injection valve based on a second reference pressure of the fuel pressure regulator. The first reference pressure and the second reference pressure are adjusted relative to each other. 1. An internal combustion engine comprising:a fuel supply device, wherein the fuel supply device comprises a fuel pump, a fuel pressure damper, an injection valve, and a fuel pressure regulator;wherein the fuel pressure damper comprises a damper chamber and a damper back chamber and further comprises a damper membrane separating the damper chamber and the damper back chamber from each other;wherein the damper chamber of the fuel pressure damper is loaded with a first reference pressure;wherein the fuel pressure regulator has a second reference pressure and regulates a pressure of fuel supplied by the fuel pump to the injection valve based on the second reference pressure;wherein the first reference pressure and the second reference pressure are adjusted relative to each other.2. The internal combustion engine according to claim 1 , wherein the first reference pressure is identical to the second reference pressure.3. The internal combustion engine according to claim 2 , wherein the first reference pressure is ambient pressure and the second reference pressure is ambient pressure.4. The internal combustion engine according to claim 1 , wherein the damper chamber is arranged in a flow path of the fuel from the fuel pump to the injection valve.5. The internal combustion engine according to claim 1 , wherein the ...

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Номер записи: 15
13-06-2013 дата публикации

Ignition circuit

Номер: US20130146040A1
Автор: Arno Kinnen, Ernst Buck, Heiko Daeschner
Принадлежит: Andreas Stihl AG and Co KG

An ignition circuit for a combustion engine has an ignition coil and a control unit for the coil. The coil and the control unit are included in a common component as an ignition module. The module is supplied with voltage by a generator driven by the engine. A spark plug and the coil form a power circuit which includes a line segment to a reference potential outside the module. A sensor detects data of the engine and the output of the sensor is supplied to the module. The sensor is supplied with voltage via a sensor circuit. The sensor circuit and the power circuit use the line segment as a common connection to the reference potential, so that for a defect of the line segment, a missing connection to the reference potential in the high voltage circuit is recognized via the change of the sensor output signals.

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Номер записи: 16
13-06-2013 дата публикации

Device and method for operating a hand-held working apparatus

Номер: US20130151126A1
Автор: Heiko Däschner, Michael Harrer, Robert Böker
Принадлежит: Andreas Stihl AG and Co KG

A hand-held working apparatus has an internal combustion engine having a crankshaft which is driven in rotation. The crankshaft drives at least one tool of the working apparatus via a centrifugal clutch. The working apparatus has a device for determining the speed of the internal combustion engine and a control device which controls the internal combustion engine. It is provided that the profile of the speed of the internal combustion engine is evaluated by the control device, and that the engagement speed of the centrifugal clutch is determined from the profile of the speed of the internal combustion engine. A method of operation is also provided.

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Номер записи: 17
27-06-2013 дата публикации

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Номер: US20130160751A1
Автор: Klatt Clemens, NAEGELE Claus, Paa Andreas, Widmann Christoph
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine has a cylinder in which a combustion chamber, bounded on one side by a reciprocating piston, is formed. The piston drives a crankshaft rotatably mounted in a crank casing. The internal combustion engine has an inlet opening for combustion air into the crank casing, and an outlet opening out of the combustion chamber. The internal combustion engine has at least one overflow duct which connects the crank casing interior to the combustion chamber. The internal combustion engine has a crank casing pressure sensor for measuring the crank casing pressure, a device for determining the rotational position of the crankshaft, and an evaluation device which evaluates the measurements of the crank casing pressure sensor. A method for operating the internal combustion engine is provided where the ambient pressure is determined using the crank casing pressure measured by the crank casing pressure sensor. 1. A method for operating an internal combustion engine , the method comprising:providing a crank casing pressure sensor in an internal combustion engine having a crank casing,measuring a crank casing pressure using the crank casing pressure sensor,evaluating the crank casing pressure measurements,using the crank casing pressure measurements to approximate the ambient pressure, andcontrolling the internal combustion engine, a component thereof, or a device attached to the internal combustion engine using crank casing pressure measurements or the approximate ambient pressure or both.2. The method according to claim 1 , further comprising:measuring an angle of rotation of a crankshaft,evaluating the angle of rotation measurements, andcontrolling the internal combustion engine, a component thereof, or a device attached to the internal combustion engine using angle of rotation measurements.3. The method according to claim 1 , wherein the internal combustion engine comprises:a combustion chamber bounded on one side and around a circumference by a cylinder ...

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Номер записи: 18
27-06-2013 дата публикации

PROTECTIVE CIRCUIT FOR A RECHARGEABLE BATTERY PACK

Номер: US20130162052A1
Автор: Gaul Henrik, Schurr Martin
Принадлежит: Andreas Stihl AG & Co., KG

A protective circuit for an arrangement which includes a plurality of individual cells in a rechargeable battery pack with a predefined number of individual cells being connected in series in a cell row and at least two cell rows being situated parallel to one another. The component current flowing in a first cell row when the rechargeable battery pack is subject to loading is compared with the component current flowing in a second cell row to generate a signal when there is an implausible deviation in the component currents with respect to one smother. The signal is used to disconnect a defective cell row or to switch off the entire rechargeable battery pack in order to protect the latter. 1. A protective circuit for an arrangement having a plurality of individual cells in a rechargeable battery pack , wherein a predetermined number of individual cells are connected in series so as to form a cell row and at least a first and a second cell row are arranged in parallel; the first cell row is configured to have a first component current flow therein when a load is applied to the battery pack and the second cell row is configured to have a second component current flow therein when a load is applied to the battery pack , said protective circuit comprising;a circuit device configured to compare the first component current with the second component current to determine whether an implausible deviation is present therebetween and generate a signal when an implausible deviation is present.2. The protective circuit of claim 1 , wherein:{'sub': 'G', 'said circuit device is configured to calculate a difference between the first and the second component currents and generate said signal when said difference exceeds a pregiven value (I).'}3. The protective circuit of claim 1 , wherein said circuit claim 1 , device is configured to standardize said first component current and said second component current before comparing said currents; and claim 1 , said circuit device is ...

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Номер записи: 19
27-06-2013 дата публикации

ELECTRIC WORK APPARATUS WITH AN ELECTRIC LOAD AND A RECHARGEABLE BATTERY PACK

Номер: US20130162055A1
Автор: Kolb Joachim, Reber Volker
Принадлежит: ANDREAS STIHL AG & CO. KG

An electric work apparatus having an electric load which is fed from a rechargeable battery pack. The battery pack is accommodated in a housing with the electric load being connected to the battery pack via an electric connecting cable. To provide cable guidance for the connecting cable that is ergonomically suitable for a user, cable ducts are molded in a housing wall of the backpack-type battery pack that is separate from the electric load. The cable duct opens in the edge of the housing as cable outlets. 1. An electric work apparatus comprising:a battery pack;a housing configured to accommodate said battery pack therein and having a housing wall and an edge;an electrical load configured to be fed by said battery pack;an electrical connecting cable configured to connect said electrical load to said battery pack;said housing being configured as a backpack-type component which is separate from said electrical load;said housing having a cable duct formed in said housing wall; and,said cable duct having a cable outlet in said edge of said housing.2. The work apparatus of claim 1 , wherein;said cable duct has at least two of said cable outlets in said edge of said housing;said edge of said housing defines a peripheral direction;said cable outlets being disposed at a distance to each other in said peripheral direction.3. The work apparatus of claim 1 , wherein said cable duct is configured as a channel.4. The work apparatus of claim 1 , wherein;said battery pack includes a ceil pack arranged in said housing;said housing wall includes a back plate;said housing wall defines an outer surface;said back plate and said cell pack conjointly define an installation space therebetween; and,said cable duct is accommodated in said installation space and is open toward said outer surface of said housing wall.5. The work apparatus of claim 4 , wherein said cable duct is disposed in said back plate.6. The work apparatus of claim 4 , wherein:said back plate defines a portion of said ...

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Номер записи: 20
27-06-2013 дата публикации

PROTECTIVE CIRCUIT FOR A RECHARGEABLE BATTERY PACK

Номер: US20130162217A1
Автор: Gaul Henrik, Liebhard Gernot
Принадлежит: Andreas Stihl AG & Co., KG

The invention is directed to a protective circuit for a multiplicity of individual Cells arranged in a rechargeable battery pack, wherein a predefined number of individual cells forms a cell network. A monitoring circuit for the state of charge of the individual cells in the cell network is provided. Wherein the voltage at an individual cell is detected and the detected voltages of a plurality of individual cells are compared among one another to output a signal when an unbalancing limit is exceeded unbalancing limit indicates a permissible voltage difference between two selected individual cells of the cell network. The unbalancing limit of the cell network is provided as a characteristic curve variable over its state of charge. To alter the unbalancing limit, the characteristic curve is altered in dependence on a correction value. 1. A protective circuit for a multiplicity of individual cells mounted in a rechargeable battery pack wherein a pregiven number of the individual cells form a cell network having at least one operating variable , the protective circuit comprising:a monitoring circuit for monitoring the charge state of the individual cells of said cell network;{'sub': na', 'nb', 'nc, 'said monitoring circuit, being operatively connected to said individual cells of said cell network for detecting respective voltages (U, U, U) applied across corresponding ones of said individual cells;'}{'sub': na', 'nb', 'nc', 'Dn, 'said monitoring circuit being configured to compare the detected voltage (U, U, U) of several of said individual cells of said cell network to each other and output a signal when the comparison exceeds a debalancing limit (U) assigned to said cell network;'}{'sub': Dn', 'z, 'said debalancing limit (U) specifying a permissible voltage difference (ΔU) between two selected ones of said individual cells of said cell network;'}{'sub': 'Dn', 'said debalancing limit (U) being defined as a characteristic line (D) as a function of the charge state (SOC) ...

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Номер записи: 21
27-06-2013 дата публикации

PROTECTIVE CIRCUIT FOR A RECHARGEABLE BATTERY PACK

Номер: US20130163135A1
Автор: Liebhard Gernot
Принадлежит: ANDREAS STIHL AG & CO. KG

A protective circuit for an arrangement includes a multiplicity of individual cells in a rechargeable battery pack. A predefined number of individual cells are connected in series in a cell row and at least two cell rows are mutually parallel, and at least one cell connector situated between the individual cells at a location of one cell row is electrically connected via a compensation line to the cell connector situated at an identical location of the parallel cell row, and the potential of the cell connector connected to the compensation line at one location of one cell row and the potential of the cell connector electrically connected to the compensation line at the same location of the parallel cell row are detected and the detected potentials are fed to an evaluation unit. 1. A protective circuit for an arrangement having a plurality of individual cells in a battery pack , wherein a predetermined number of individual cells are connected in series via cell connectors so as to form a cell row and at least two cell rows are arranged in parallel , each of the individual cells of one cell row having a position which corresponds to the position of a corresponding one of the individual cells in the other cell row , each of the cell connectors of one cell row having a position therein which corresponds to the position of a corresponding one of the cell connectors in the other cell row , a plurality of compensation lines electrically interconnecting corresponding ones of the cell connectors of the different rows , the cell connectors being at respective potentials (U , U) , the protective circuit comprising:an evaluation unit;{'sub': nr', 'nl, 'a circuit device configured to detect the potential (U) of the cell connector connected to the compensation line of one of the cell rows and the potential (U) of the corresponding cell connector connected to said one compensation line of the other parallel cell row; and,'}{'sub': nl', 'nr, 'said circuit device being further ...

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Номер записи: 22
27-06-2013 дата публикации

RECHARGEABLE BATTERY PACK FOR AN ELECTRICAL LOAD

Номер: US20130164600A1
Автор: Gaul Henrik, Kolb Joachim, Liebhard Gernot, Reber Volker, Rosskamp Heiko
Принадлежит: Andreas Stihl AG & Co., KG

The invention is directed to a rechargeable battery pack for an electrical load with the load being connected to the rechargeable battery pack by a connection cable. A housing of the rechargeable battery pack has an inner space for accommodating a large number of rechargeable individual cells which are electrically connected to one another and supply the load via the connection cable. To provide the housing with a high level of stability, provision is made for the receiving space in the housing to be subdivided into individual receptacles by partition walls. A cell pack includes a predefined number of the individual cells and is arranged in a corresponding individual receptacle. Each cell pack forms an independent unit which is held in the individual receptacle. The individual cells of a cell pack are electrically and mechanically connected to one another by cell connectors. 1. A rechargeable battery pack for an electric load comprising:a connecting cable;a multiplicity of rechargeable individual cells which are electrically interconnected and configured to feed the electric load via said connecting cable;a housing having a receiving space configured for accommodating said, multiplicity of cells;partitioning walls configured to subdivide said receiving space into individual receptacles;said multiplicity of individual cells being apportioned into a plurality of cell packs wherein each one of said cell packs contains a predetermined number of said individual cells;said cell packs defining respective independent components configured to be held in corresponding ones of said, receptacles;a plurality of cell connectors assigned to corresponding ones of said cell packs; and,each one of said cell connectors being configured to electrically interconnect the individual cells of the cell pack to which said one connector is assigned.2. The rechargeable battery pack of claim 1 , wherein each one of said cell packs has an outer contour; and claim 1 , said housing has engagement ...

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Номер записи: 23
25-07-2013 дата публикации

CUTTER HEAD OF A MANUALLY GUIDED IMPLEMENT

Номер: US20130185946A1
Автор: Apfel Norbert, Theile Marc
Принадлежит: ANDREAS STIHL AG & CO. KG

A cutter head of an implement, comprising a cutting blade rotatabiy drivable about an axis of rotation and provided with at least two blade wings that extend along a longitudinal axis in a radial direction relative to the axis of rotation. The cutting blade is clamped between two contact or pressure pieces, at least one of which is provided with at least one radially extending dampening projection that rests against at least one of the blade wings and has a longitudinal axis that is angularly offset relative to the longitudinal axis of the blade wing. A protection against rotation that acts in at least one direction of rotation is provided between cutting blade and the contact or pressure piece that is provided with the at least one radially extending dampening projection. The protection against rotation is in the form of a positive connection between the angularly offset dampening projection and an outer edge of an associated blade wing. 1. A cutter head of an implement , comprising:a cutting blade that is rotatably drivable about an axis of rotation, wherein said cutting blade is provided with at least two blade wings, and wherein said blade wings extend along a longitudinal axis in a radial direction relative to said axis of rotation;two contact or pressure pieces, wherein said cutting blade is clamped between said contact or pressure pieces, and wherein at least one of said contact or pressure pieces is provided with at least one radially extending dampening projection that rests against at least one of said blade wings and has a longitudinal axis that is angularly offset relative to said longitudinal axis of said blade wings; anda protection against rotation that acts in at least one direction of rotation, wherein said protection against rotation is provided between said cutting blade and said at least one contact or pressure piece that is provided with said at least one radially extending dampening projection, and wherein said protection against rotation is in ...

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Номер записи: 24
08-08-2013 дата публикации

Handheld work apparatus

Номер: US20130199812A1
Автор: Manuel Dangelmaier, Tim Gegg
Принадлежит: Andreas Stihl AG and Co KG

A handheld work apparatus has a combustion engine ( 4 ) for driving a tool. The combustion engine ( 4 ) has an ignition device, a device for metering fuel and a control device ( 31 ). The control device ( 31 ) engages when an engagement speed (n E1 , n E2 ) is reached, in order to limit the speed (n) of the combustion engine ( 4 ). In order to allow the speed (n) to be set in an easy manner at full throttle, the work apparatus has a device for setting the engagement speed (n E2 ) by the user.

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Номер записи: 25
08-08-2013 дата публикации

METHOD FOR OPERATING A WORK APPARATUS HAVING AN ELECTRIC MOTOR AND WORK APPARATUS HAVING AN ELECTRIC MOTOR

Номер: US20130200837A1
Автор: Liebhard Gernot, Oerding Jochen, Renz Christian, Wichert René
Принадлежит: ANDREAS STIHL AG & CO. KG

An electric motor in a work apparatus has a power characteristic line which runs between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor. The power characteristic line has a power characteristic with a pronounced maximum (M) and an operating plateau (AP) which lies in a working rotational speed range (AD) of the work apparatus. A method for operating the electric motor provides for configuring the position of the operating plateau (AP) to be variable with respect to the rotational speed of the electric motor to achieve stable operating points over a wide rotational speed range. 1. A method for operating an electric motor in a work apparatus having a power characteristic line between a lower rotational speed of the electric motor and an upper rotational speed of the electric motor wherein the power characteristic line is configured so as to cause the power characteristic to have a pronounced maximum (M) and an operating plateau disposed in an operating rotational speed range (AD) of the work apparatus , the method comprising the step of:shifting the position of the operating plateau (AP) with respect to the rotational speed (n) of the electric motor.2. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) is performed with an otherwise unchanged power characteristic of the power characteristic line.3. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) with respect to the rotational speed (n) is achieved by setting a desired rotational speed range (AD).4. The method of claim 1 , wherein said shifting of the position of the operating plateau (AP) with respect to the rotational speed (n) is achieved by setting a desired operating rotational speed (n claim 1 , n claim 1 , n claim 1 , n).5. The method of further comprising the steps of:{'sub': A', 'A1', 'A2', 'A3, 'preselecting one of an operating rotational speed range (AD) and an operating ...

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Номер записи: 26
05-09-2013 дата публикации

WORK APPARATUS

Номер: US20130228350A1
Автор: Fattorusso Antonio, Guenther David, Haeberlein Juergen
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus such as a bed redefiner or edger has a handle for guiding the work apparatus over the ground. The apparatus also includes a drive motor which drives a tool in rotation. During operation, the apparatus is moved over the ground by the operator in a direction of movement. The tool is covered at least partially by a protective hood and a sliding skid is arranged on that end of the protective hood located at the front in the direction of movement. The sliding skid has an abutment surface for a flexible spray guard fixed to the protective hood. The spray guard is fastened to the protective hood in its fastening region located at the front viewed in the direction of movement. The spray guard is movable in its protective region located at the rear viewed in the direction of movement. 1. A work apparatus configured to be moved by an operator in a movement direction , the work apparatus comprising:a handle configured for guiding the work apparatus over the ground in said movement direction;a work tool;a drive motor configured to drive said work tool in rotation;a protective hood having a forward end with respect the direction, of the movement direction and configured to at least partially cover said work tool;a sliding skid disposed on said front end of said, protective hood;a flexible spray guard having an attachment section lying forward when viewed with respect to said movement direction;said flexible spray guard being attached to said protective hood at said attachment section;said flexible spray guard further having a movable protective section lying rearward when viewed in said movement direction; and,said sliding skid having a contact surface for receiving said movable protective section thereagainst during the operation of said work apparatus.2. The work apparatus of claim 1 , wherein said contact surface during operation of the work apparatus runs rearward and downward with respect to said movement direction.3. The work apparatus of claim 1 ...

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Номер записи: 27
05-09-2013 дата публикации

FURROW CUTTER

Номер: US20130228351A1
Автор: Guenther David, Haeberlein Juergen, Stark Thomas
Принадлежит: ANDREAS STIHL AG & CO. KG

A blade for a furrow cutter has a planar fastening region which is located in a fastening plane. The blade is driven in rotation via a transmission arranged in a transmission housing. The fastening plans separates a first region of the furrow cutter from a second region of the furrow cutter. The transmission is arranged in the first region. The blade has at least one arm projecting from the fastening region and having a free end. The arm has a first segment which extends out of the fastening plane into the second region. A simple structure, a good cutting result and a high service life are achieved when the arm has a second segment in which the arm extends back in the direction of the fastening plane. 1. A furrow cutter comprising:a blade having a planar fastening region defining a fastening plane;said fastening plane partitioning the furrow cutter into a first region and a second region;a transmission housing;a transmission arranged in the first region in said transmission housing and configured to rotatably drive said blade;said blade having at least one arm having a free end and projecting away from said fastening region;said arm having a first segment which extends out of said fastening plane into the second region; and,said arm having a second segment in which said arm runs back in the direction of said fastening plane.2. The furrow cutter of claim 1 , wherein said arm is configured to be planar in said second segment and is inclined at an angle (β) with respect to said fastening plane.3. The furrow cutter of claim 2 , wherein said angle (β) lies in a range between approximately 30° and approximately 80°.4. The furrow cutter of claim 2 , wherein said angle (β) lies in a range between approximately 40° and approximately 70°.5. The furrow cutter of claim 2 , wherein said angle (β) lies in a range between approximately 50° and approximately 60°.6. The furrow cutter of claim 1 , wherein said second segment extends up to said free end.7. The furrow cutter of claim 1 ...

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Номер записи: 28
10-10-2013 дата публикации

Internal Combustion Engine

Номер: US20130263812A1
Автор: Adam Roland, Geyer Werner, Leiendecker Martin, Volckart Lutz
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine has a cylinder liner arranged in the cylinder. A piston moves reciprocatingly in a direction of the longitudinal cylinder axis in the cylinder and is guided within the cylinder liner across a section of a movement path of the piston in the cylinder. A combustion chamber disposed in the cylinder is delimited by the piston. In a crankcase, a crankshaft is rotatably supported by a crankshaft bearing, wherein the crankshaft is driven in rotation by the piston about an axis of rotation of the crankshaft. A position of the cylinder liner relative to the crankcase is secured with form fit by a securing element located at an end face of the cylinder liner that is facing the crankcase. No loads are transmitted into the cylinder liner from the crankshaft bearing through the end face of the cylinder liner that is facing the crankcase. 1. An internal combustion engine comprising:a cylinder having a longitudinal cylinder axis;a cylinder liner arranged in the cylinder;a piston supported so as to move reciprocatingly in a direction of the longitudinal cylinder axis, wherein the piston is guided within the cylinder liner at least across a section of a movement path of the piston in the cylinder;a combustion chamber disposed in the cylinder and delimited by the piston;a crankcase;a crankshaft rotatably supported in the crankcase by at least one crankshaft bearing, wherein the crankshaft is driven in rotation by the piston about an axis of rotation of the crankshaft;wherein a position of the cylinder liner relative to the crankcase is secured with form fit by a securing element located at an end face of the cylinder liner that is facing the crankcase;wherein no loads are transmitted into the cylinder liner from the at least one crankshaft bearing through the end face of the cylinder liner that is facing the crankcase.2. The internal combustion engine according to claim 1 , wherein the securing element absorbs loads from the at least one crankshaft ...

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Номер записи: 29
17-10-2013 дата публикации

Cutting chain for a hand-operated implement and hand-operated implement

Номер: US20130269673A1
Автор: Buchholtz Jochen, SCHULZ Matthias, Zimmermann Helmut
Принадлежит: ANDREAS STIHL AG & CO. KG

A cutting chain for a hand-operated implement for cutting metal and mineral materials such as a stone cutter has central connecting links which are connected to one another by lateral connecting links. The central connecting links comprise first central connecting links which each have a drive tooth. The cutting chain has two central connecting links with drive teeth shaped differently to the drive teeth on the first central connecting links; or located a different distance from the leading drive teeth; or having no drive teeth. A hand-operated implement for cutting mineral materials has a drive motor which drives the cutting chain around a guide bar by a drive sprocket. The cutting chain is guided round part of the circumference of the drive sprocket and round a nose sprocket on the guide bar. The drive sprocket or nose sprocket have different first and second areas matched to the cutting chain. 1. A cutting chain for a hand-operated implement for cutting metal and mineral materials , the cutting chain comprising central connecting links;lateral connecting links connecting the central connecting links to each other;the central connecting links include first central connecting links configured as drive links each having a first drive tooth; the second central connecting links each have a second drive tooth, wherein the second drive tooth is shaped differently than the first drive tooth; or', 'the second central connecting links each have a second drive tooth, wherein the first drive tooth is positioned at a first distance to the second drive tooth leading in a direction of travel of the cutting chain and the second drive tooth is positioned at a second distance relative to the first drive tooth leading in a direction of travel of the cutting chain, wherein the first distance is different from the second distance; or', 'the second central connecting links have no drive tooth., 'the central connecting links including second central connecting links, wherein the second ...

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Номер записи: 30
17-10-2013 дата публикации

WORK APPARATUS

Номер: US20130270933A1
Автор: Kraetzig David
Принадлежит: ANDREAS STIHL AG & CO. KG

A work apparatus has a tool which is driven in rotation by a drive motor via a transmission. The drive motor is an electric motor which has a commutator and brushes. The drive motor is arranged in a motor housing and drives an impeller wheel which conveys a cooling airflow for the drive motor. Simple and effective lubrication of the transmission is achieved with the cooling airflow flowing past the commutator and brushes and the transmission is arranged downstream of the commutator in the cooling airflow. The motor housing is formed in a manner closed toward the transmission housing on that end side that faces the transmission housing and is connected to the transmission housing via a flow connection. 1. A work apparatus comprising:a work tool;a transmission;an electric drive motor for rotatably driving said work tool via said transmission;a motor housing defining a flow path for conducting a cooling airflow therealong;said drive motor being mounted in said motor housing and having a coil and a commutator assembly including a commutator and brushes;a fan wheel driven by said drive motor and said fan wheel being configured to move said cooling airflow over said coil and said commutator assembly during operation;said motor housing having an exit opening for passing said cooling airflow out from said motor housing;said exit opening being arranged in said flow path downstream of said commutator assembly;a transmission housing;said motor housing having an end facing toward said transmission housing and said motor housing being configured to be closed off at said end thereof;a flow connection connecting said motor housing to said transmission housing and configured to conduct at least a portion of said cooling airflow into said transmission housing; and,said transmission being arranged in said cooling airflow through said transmission housing.2. The work apparatus of claim 1 , wherein said cooling airflow transports carbon dust of said brushes to said transmission.3. The ...

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Номер записи: 31
24-10-2013 дата публикации

WORK APPARATUS HAVING A FUEL PUMP

Номер: US20130276724A1
Автор: Lank Jonas, Uhl Klaus-Martin, Zimmermann Helmut
Принадлежит: ANDREAS STIHL AG & CO. KG

A work apparatus has an internal combustion engine for driving a work tool of the work apparatus and a fuel pump which is driven by the engine and delivers fuel from a fuel tank to the engine. The work apparatus has a feed pump which is to be actuated manually by the operator. The fuel pump and the feed pump form one component which is arranged outside the fuel tank. The fuel tank has a tank wall which delimits the tank interior. An advantageous arrangement arid satisfactory cooling of the component are achieved if the component is arranged at least partially on the tank wall. 1. A work apparatus comprising:a work tool;a combustion engine configured to drive said work tool;a fuel tank having a tank wall del inviting a tank interior;a fuel pump configured to convey fuel from said fuel tank to said combustion engine;said combustion engine being further configured to drive said fuel pump;a feed pump configured to be manually actuated by a user; and,said fuel pump and said feed pump conjointly defining a component arranged outside of said fuel tank at least partially on said tank wall.2. The work apparatus of claim 1 , wherein said fuel tank has a recess; and claim 1 , said component is arranged in said recess.3. The work apparatus of claim 2 , wherein said fuel tank has the following; an upper side arranged topside in a usual rest position of said work apparatus; a rear side facing away from said work tool; a lower side arranged bottomside in said usual rest position; and claim 2 , at least one longitudinal side.4. The work apparatus of claim 3 , wherein said component has a height (b) measured in said rest claim 3 , position in the effective direction of gravitational force; at least 50% of said height (b) lies below the uppermost region of said upper side when said work apparatus is in said rest position and above the lowest region of said lower side of said fuel tank.5. The work apparatus of claim 3 , wherein said recess extends on said upper side and rear side of ...

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Номер записи: 32
21-11-2013 дата публикации

CHAIN GUARD AND CHAINSAW SYSTEM

Номер: US20130305545A1
Автор: Schell Berthold
Принадлежит: ANDREAS STIHL AG & CO. KG

The application relates to a chain guard for a chainsaw with interchangeable cutting attachments of different lengths, said cutting attachments having cutting chains, wherein the chain guard comprises an insertion opening for inserting a cutting attachment, at least two side walls for covering lateral surfaces of the cutting attachment, a front end opposite the insertion opening, a first latching depression formed in at least one side wall, and a second latching depression formed in at least one side wall at a distance closer toward the insertion opening with respect to the first latching depression, wherein the first latching depression and the second latching depression each comprise an arcuate latching surface for latching in a form-fitting manner with a cutting chain of the cutting attachment, said latching being active in the direction of a longitudinal axis of the chain guard, and also to a chainsaw system having such a chain guard. 1. A chain guard for a chainsaw with interchangeable cutting attachments of different lengths , said cutting attachments having cutting chains , wherein the chain guard comprises:an insertion opening for inserting a cutting attachment,at least two side walls for covering lateral surfaces of the cutting attachment,a front end opposite the insertion opening,a first latching depression formed in at least one side wall, anda second latching depression formed in at least one side wall at a distance closer toward the insertion opening with respect to the first latching depression,wherein the first latching depression and the second latching depression each comprise an arcuate latching surface for latching in a form-fitting manner with a cutting chain of the cutting attachment, said latching being active in the direction of a longitudinal axis of the chain guard.2. The chain guard according to claim 1 ,wherein at least two opposing first latching depressions are formed in the side walls, andwherein at least two opposing second latching ...

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Номер записи: 33
21-11-2013 дата публикации

HAND-HELD WORK IMPLEMENT HAVING AN INTERNAL COMBUSTION ENGINE AND AN AIR FILTER

Номер: US20130306018A1
Автор: Rögele Steffen, von Krane Florian
Принадлежит: ANDREAS STIHL AG & CO. KG

The application relates to a hand-held working implement comprising an internal combustion engine, an air filter, and an intermediate flange, wherein the intermediate flange is arranged between the air filter and the internal combustion engine, wherein the bottom of the intermediate flange is arranged opposite the air filter bottom, wherein the air filter bottom and the intermediate flange bound an interior space, wherein the interior space comprises a portion of the duct, wherein a portion of the duct in the interior space is bounded by at least one boundary wall which protrudes into the interior space transversely with respect to the air filter bottom, wherein the boundary wall is formed integrally on the intermediate flange and/or on the air filter bottom, and wherein the boundary wall bridges the spacing between the air filter bottom and the bottom of the intermediate flange. 1. A hand-held work implement comprisingan internal combustion engine,an air filter,wherein the air filter comprises a filter element which is connected fixedly at its front-side ends to end plates, wherein the filter element is cylindrical, wherein the filter element and the end plates create a separation between a dirty side and a pure side of the air filter, wherein the pure side of the air filter is connected via a duct to the internal combustion engine, and wherein a first end plate is configured as an air filter bottom, andan intermediate flange,wherein the intermediate flange is arranged between the air filter and the internal combustion engine, wherein the bottom of the intermediate flange is arranged opposite the air filter bottom, wherein the air filter bottom and the intermediate flange bound an interior space, wherein the interior space comprises a portion of the duct, wherein a portion of the duct in the interior space is bounded by at least one boundary wall which protrudes into the interior space transversely with respect to the air filter bottom, wherein the boundary wall is ...

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Номер записи: 34
28-11-2013 дата публикации

Motor Chain Saw with Supply Pump

Номер: US20130312267A1
Автор: Engel Bernd
Принадлежит: ANDREAS STIHL AG & CO. KG

A motor chain saw has a first driven sprocket wheel driving a saw chain lubricated via a supply pump driven by first and second drive wheel, wherein the second drive wheel is connected to the first sprocket wheel. A drive element with coupling section is connected to the first sprocket wheel and the second drive wheel is formed on the drive element. A second sprocket wheel can be used in place of the first sprocket wheel. The first and second sprocket wheels have different geometries. The coupling section has first and second followers correlated with follower surfaces of the first and second sprocket wheels. The coupling section contacts with first followers the follower surfaces of the first sprocket wheel or with second followers the follower surfaces of the second sprocket wheel when used in place of the first sprocket wheel. 1. A motor chain saw comprising:a drive motor;a saw chain;a first sprocket wheel operatively connected to the drive motor;the first sprocket wheel having teeth engaging the saw chain for driving the saw chain;a supply pump supplying the saw chain with chain oil for lubricating the saw chain;a pump drive operatively connected to the supply pump and comprising a first drive wheel and a second drive wheel, wherein the first drive wheel is connected to the supply pump and the second drive wheel is connected to the first sprocket wheel, and wherein the first and second drive wheels are drivingly connected with each other;a drive element comprising a coupling section, wherein the coupling section is connected with positive fit to the first sprocket wheel;the second drive wheel formed on the drive element;the coupling section having followers and the first sprocket wheel having follower surfaces correlated with the followers of the coupling section, respectively, wherein in a circumferential direction of the first sprocket wheel several of the follower surfaces of the first sprocket wheel are contacting several of the followers of the coupling ...

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Номер записи: 35
05-12-2013 дата публикации

Cutting chain for cutting mineral and metal materials

Номер: US20130319201A1
Автор: SCHULZ Matthias
Принадлежит: ANDREAS STIHL AG & CO. KG

A cuffing chain for cutting mineral and metal materials has central chain links and lateral connecting links. The cutting chain has connecting pins with a central section which has a diameter that is greater than the diameter of openings in adjacent connecting links. The cutting chain has two connecting links which have a supporting section instead of a cutting element. At least two second connecting links positioned adjacent to one another at right angles to the direction of travel of the cutting chain are formed separately from one another. As a result, the cutting chain can be opened for maintenance and repairs despite the use of collar studs as connecting pins. 1. A cutting chain for cutting mineral and metal materials , the cutting chain comprising:central chain links;lateral connecting links connecting the central chain links to each other, wherein at least two connecting links are positioned adjacent to each another, respectively, in a transverse direction relative to a direction of travel of the cutting chain;connecting pins connecting the central chain links to the connecting links;the connecting pins projecting through first openings in the connecting links and through second openings in the central chain links;the connecting pins each having a central axis, wherein the central axes of the connecting pins are lying in a common central axis plane when the cutting chain is extended;the connecting links including at least one first connecting link having a cutting element fixed thereto, the cutting element having a top facing away from the connecting pin;the connecting links including at least one second connecting link having a supporting section instead of a cutting element;the connecting pins each having a central section positioned between adjacent connecting links, wherein a diameter of the central section of the connecting pins is larger than the diameter of the first opening; andat least two second connecting links positioned adjacent to one another in ...

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Номер записи: 36
12-12-2013 дата публикации

Grass Blade for a Trimmer

Номер: US20130327198A1
Автор: Stark Thomas
Принадлежит: ANDREAS STIHL AG & CO. KG

A cutting blade for a hand-guided trimmer with a drive motor has a disk-shaped base member with cutting teeth disposed about a circumference of the base member. The base member has a first face and a second face opposite the first face. The cutting teeth each have a tooth face edge, the tooth face edge leading in driving direction of the cutting blade and extending radially, and a tooth back edge extending in the circumferential direction. The tooth face edge and the tooth back edge of the cutting teeth are alternatingly ground on the first face or the second face in the circumferential direction and define together a common cutting tip that is leading in the drive direction. Several of the cutting tips of the cutting teeth that are sequentially arranged in the circumferential direction are positioned in a common plane. 1. A cutting blade for a hand-guided trimmer with a drive motor , the cutting blade comprising:a disk-shaped base member with cutting teeth disposed about a circumference of the base member;the base member having a first face and a second face opposite the first face;the cutting teeth each comprising a tooth face edge, the tooth face edge leading in a driving direction of the cutting blade and extending approximately radially, and further comprising a tooth back edge extending in a circumferential direction of the base member, wherein the tooth face edge and the tooth back edge of the cutting teeth are alternatingly ground on the first face or the second face in the circumferential direction and the tooth face edge and the tooth back edge define together a common cutting tip, respectively, wherein the cutting tip is leading in the drive direction;several of the cutting tips of the cutting teeth that are sequentially arranged in the circumferential direction are positioned in a common plane.2. The cutting blade according to claim 1 , wherein all of the cutting tips of all of the cutting teeth of the cutting blade are positioned in said common plane.3. ...

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Номер записи: 37
26-12-2013 дата публикации

Power Tool

Номер: US20130340693A1
Автор: Kinnen Arno, Klaric Igor, Layher Wolfgang, Schäffer Thorsten, Tost Christopher
Принадлежит: ANDREAS STIHL AG & CO. KG

A power tool has an internal combustion engine with a cylinder. An injection valve supplies fuel to the internal combustion engine. A fuel pump conveys fuel from a fuel tank to the injection valve. A fan wheel is provided that is driven by the internal combustion engine. The cylinder is arranged in a first cooling zone of the power tool and the fan wheel conveys cooling air through the first cooling zone. The fuel pump is arranged in a second cooling zone of the power tool. Between the first cooling zone and the second cooling zone a buffer zone is arranged. The buffer zone is separated by at least one first partition from the first cooling zone and by at least one second petition from the second cooling zone. 1. A power tool comprising:an internal combustion engine comprising a cylinder;an injection valve supplying fuel to the internal combustion engine;a fuel tank;a fuel pump conveying fuel from the fuel tank to the injection valve;a fan wheel driven by the internal combustion engine;wherein the cylinder is arranged in a first cooling zone of the power tool and wherein the fan wheel conveys cooling air through the first cooling zone;wherein the fuel pump is arranged in a second cooling zone of the power tool;wherein between the first cooling zone and the second cooling zone a buffer zone is arranged, wherein the buffer zone is separated by at least one first partition from the first cooling zone and by at least one second partition from the second cooling zone.2. The power tool according to claim 1 , wherein the internal combustion engine takes in combustion air and wherein the second cooling zone is positioned in a flow path of the combustion air.3. The power tool according to claim 2 , further comprising an intake opening wherein the combustion air is taken in through the intake opening into the second cooling zone and the fuel pump is positioned in the flow path of the combustion air flowing in through the intake opening.4. The power tool according to claim 3 , ...

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Номер записи: 38
26-12-2013 дата публикации

Internal combustion engine and hand-held power tool with internal combustion engine

Номер: US20130340701A1
Автор: Klatt Clemens, Paa Andreas
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine of a hand-held power tool has a crankcase having a circumferential wall extending in a circumferential direction of the crankcase. A crankshaft is supported so as to be rotatable about an axis of rotation within the crankcase. At least one transfer passage extends from the crankcase into the cylinder of the engine, wherein the transfer passage has an inlet port at the crankcase. At least one fuel retaining device is disposed on the circumferential wall of the crankcase. A radial direction, starting at the axis of rotation of the crankshaft and extending outwardly, extends through the at least one fuel retaining device. The at least one fuel retaining device has a depth in the radial direction and a length in the circumferential direction. The at least one fuel retaining device, relative to the radial direction, has an asymmetric cross-section in the circumferential direction. 1. An internal combustion engine of a hand-held power tool adapted to drive a tool member of the power tool , the internal combustion engine comprising:a crankcase having a circumferential wall extending in a circumferential direction of the crankcase;a crankshaft supported so as to be rotatable about an axis of rotation within the crankcase;a cylinder;at least one transfer passage extending from the crankcase into the cylinder, wherein the transfer passage has an inlet port at the crankcase;at least one fuel retaining device disposed on the circumferential wall of the crankcase;wherein a radial direction, starting at the axis of rotation of the crankshaft and extending outwardly, extends through the at least one fuel retaining device;wherein the at least one fuel retaining device has a depth in the radial direction and a length in the circumferential direction;wherein the at least one fuel retaining device, relative to the radial direction, has an asymmetric cross-section in the circumferential direction.2. The internal combustion engine according to claim 1 , ...

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Номер записи: 39
26-12-2013 дата публикации

Internal combustion engine with fuel system

Номер: US20130340722A1
Автор: Dietenberger Michael, Klatt Clemens, Layher Wolfgang, Leopold Tobias, Osburg Gerhard
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine has a fuel system that has a fuel valve with a housing, wherein in the housing a fuel chamber is formed. A fuel pump pumps fuel from a fuel tank into the fuel chamber. A conveying pump provides forced conveyance of fuel into the fuel system. A feed line is connected to the fuel chamber of the fuel valve. The conveying pump is arranged in the feed line and supplies fuel to the fuel chamber. A relief line is connected to the fuel chamber of the fuel valve and a first valve is arranged in the relief line. 1. An internal combustion engine comprising: a fuel valve with a housing, wherein in the housing a fuel chamber is formed;', 'a fuel tank;', 'a fuel pump pumping fuel from the fuel tank into the fuel chamber;', 'a conveying pump adapted to provide forced conveyance of fuel into the fuel system;', 'a feed line connected to the fuel chamber of the fuel valve, wherein the conveying pump is arranged in the feed line and supplies fuel to the fuel chamber;', 'a relief line connected to the fuel chamber of the fuel valve;', 'a first valve arranged in the relief line., 'a fuel system comprising2. The internal combustion engine according to claim 1 , wherein the fuel pump has a pump chamber and wherein the feed line in which the conveying pump is arranged is positioned in a flow path from the pump chamber to the fuel chamber.3. The internal combustion engine according to claim 2 , wherein the fuel system further comprises a pressure regulator comprising a control chamber claim 2 , wherein the pressure regulator is arranged downstream of the fuel pump and wherein the feed line connects the control chamber of the pressure regulator with the fuel chamber.4. The internal combustion engine according to claim 1 , wherein the feed line is a bypass line bypassing the fuel pump and connecting the fuel tank to the fuel chamber.5. The internal combustion engine according to claim 1 , wherein the first valve is actuated as a function of an actuating pressure. ...

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Номер записи: 40
02-01-2014 дата публикации

Power tool with Bowden cable

Номер: US20140000407A1
Автор: Arno Kinnen, Christopher Tost, Igor Klaric
Принадлежит: Andreas Stihl AG and Co KG

A power tool has a drive motor with an actuating element. The power tool has a power tool housing with a first subassembly and a second subassembly that is connected with the first subassembly. An operating element is supported on the first subassembly. A Bowden cable is disposed within the power tool housing and has a Bowden cable housing and a Bowden cable inner wire arranged in the Bowden cable housing. The actuating element is a part of the second subassembly. The Bowden cable inner wire has a first end connected to the operating element and a second end connected to the actuating element, wherein the operating element acts on the actuating element through the Bowden cable. The Bowden cable housing has a first end and a second end and the first and second ends are secured on the same one of the first and second subassemblies.

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Номер записи: 41
02-01-2014 дата публикации

Power Tool

Номер: US20140000537A1
Автор: Donner Volker, Kinnen Arno, Rieber Martin, Riehmann Jens, Schäffer Thorsten
Принадлежит: ANDREAS STIHL AG & CO. KG

A power tool has an internal combustion engine with an injection valve through which fuel is supplied to the internal combustion engine; a crankcase; and a crankshaft arranged in the crankcase so as to be rotatable about an axis of rotation. A fan wheel housing is provided and a fan wheel is arranged in the fan wheel housing and conveys cooling air to the internal combustion engine. In the fan wheel housing a connecting opening is formed. The injection valve is arranged in a cooling area, wherein cooling air is supplied by the fan wheel through the connecting opening to the cooling area. 1. A power tool comprising: an injection valve through which fuel is supplied to the internal combustion engine;', 'a crankcase;', 'a crankshaft arranged in the crankcase so as to be rotatable about an axis of rotation;, 'an internal combustion engine comprisinga fan wheel housing;a fan wheel arranged in the fan wheel housing and conveying cooling air to the internal combustion engine;wherein in the fan wheel housing a connecting opening is formed; andwherein the injection valve is arranged in a cooling area, wherein cooling air is supplied by the fan wheel through the connecting opening to the cooling area.2. The power tool according to claim 1 , wherein the connecting opening is arranged in an overpressure area of the fan wheel housing.3. The power tool according to claim 1 , wherein the fan wheel housing has a back wall that is facing the crankcase and wherein the connecting opening is formed in the back wall.4. The power tool according to claim 1 , wherein the connecting opening is connected by an air guiding passage to the cooling area.5. The power tool according to claim 4 , wherein the internal combustion engine further comprises an air guiding component claim 4 , wherein the cooling area is delimited by the air guiding component.6. The power tool according to claim 5 , wherein the air guiding component delimits the air guiding passage.7. The power tool according to claim 5 , ...

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Номер записи: 42
30-01-2014 дата публикации

Electric drive motor for a work apparatus

Номер: US20140028126A1
Автор: Adolf Juergen Neumann, Alexander Haas, Markus Maier, Michael Renz
Принадлежит: Andreas Stihl AG and Co KG

An electric drive motor for a work apparatus includes a stator having two stator poles which are at a distance from one another in the circumferential direction and have respective field windings. The motor has a rotor which rotates between the stator poles and the rotor shaft of the rotor drives a fan wheel. The cooling-air flow generated by the fan wheel enters the stator, flows therethrough and is discharged therefrom. For effective cooling, a pole intermediate space is provided between the stator poles; and, for the cooling-air flow, this space is filled by a non-magnetic guide body to provide a cooling duct delimited by the guide body and the field windings. The guide body is fastened to a support at one stator end and is inserted axially into the stator at the other end thereof.

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Номер записи: 43
30-01-2014 дата публикации

ARRANGEMENT FOR IDENTIFYING A SWITCHING POSITION OF A SWITCH ON AN INTERNAL COMBUSTION ENGINE IN A HANDHELD WORK APPARATUS

Номер: US20140028332A1
Автор: Boeker Robert, Mandl Franz, Praeger Joerg
Принадлежит: ANDREAS STIHL AG & CO. KG

The invention relates to an arrangement for identifying a switching position of a switch (on an internal combustion engine in a handheld work apparatus. An energy source for supplying power to an inductive electrical load is provided, it being possible to connect the load to the energy source in order to be switched on and off via a controller. The switch is arranged in a voltage branch which is connected in parallel with the inductive load and in which a zener diode is also connected. The zener diode is activated or inactivated via the switch as a function of the switching position of the switch. The amplitude of the switch-off voltage, which is induced when the inductive load is disconnected, is limited by the zener diode, so that it is possible to read from the magnitude of the amplitude whether the switch is closed or open. 1. An arrangement for identifying a switch position of a switch on an internal combustion engine in a handheld work apparatus , the arrangement comprising:a control;an inductive electrical load;an energy source configured to supply said inductive electrical load with energy;said inductive electrical load being connected to said energy source via said control so as to be switched on and off;a first voltage branch disposed parallel to said inductive load;said switch being a first switch having a first and a second switch position and being arranged in said first voltage branch;a first zener diode arranged in said first voltage branch;said first zener diode being configured to be switched to an active state and an inactive state in dependence upon the switch position of said first switch;said inductive load being configured to cause an induced switch-off voltage having an amplitude when said inductive load is switched off; and,said first zener diode being configured to limit said amplitude of said induced switch-off voltage.2. The arrangement of further comprising:an evaluation unit configured to evaluate said amplitude of said switch-off ...

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Номер записи: 44
06-02-2014 дата публикации

METHOD FOR SWITCHING OFF A ROTATIONAL SPEED LIMIT IN AN INTERNAL COMBUSTION ENGINE

Номер: US20140034011A1
Автор: Dangelmaier Manuel, Gegg Tim, Koelmel Armin
Принадлежит: ANDREAS STIHL AG & CO. KG

A method controls the rpm of a combustion engine in a hand-held work apparatus such as a brushcutter. The engine drives a work tool via a clutch which engages as a function of the engine rpm (n). A spark plug is arranged in the combustion chamber and is driven by an ignition unit. During start of the engine, an rpm lock circuit is active and defines a control variable as a function of the instantaneous rpm (n) of the engine. According to the magnitude of this control variable, operating parameters of the engine are adapted to change the instantaneous rpm (n). A control variable is determined for the adaptation of the operating parameters by the rpm lock circuit. The switch-off of the rpm lock circuit is provided when the control variable of the control lies outside a predetermined bandwidth of the absolute magnitude of the control variables. 1. A method of controlling the rotational speed of a combustion engine in a handheld work apparatus , wherein the combustion engine is supplied with a fuel/air mixture; the combustion engine has a crankshaft configured to drive a work tool via a clutch configured to engage in dependence upon the rotational speed of the combustion engine; the clutch being configured to generate a drive connection with the crankshaft when above an engaging rotational speed (n) and to interrupt the drive connection when below the engaging rotational speed (n); the combustion engine further having a combustion chamber and a spark plug arranged in the combustion chamber; the combustion engine further having an ignition unit for driving the spark plug and an rpm lock circuit configured to switch on when the combustion engine is started and to set the instantaneous rotational speed (n) of the combustion engine below the engaging rotational speed (n) of the clutch; the rpm lock circuit further being configured to determine a control variable of a control having a magnitude according to which operating parameters of the combustion engine are adapted so ...

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Номер записи: 45
20-02-2014 дата публикации

CIRCUIT FOR ACTIVATING AN ELECTRIC MOTOR IN A HAND GUIDED WORK APPARATUS

Номер: US20140049195A1
Автор: Gurr Kay-Steffen, Liebhard Gernot, Wichert René
Принадлежит: ANDREAS STIHL AG & CO. KG

A circuit for activating an electric motor in a work apparatus includes a main circuit having an electric motor, a rechargeable-battery pack, and an operating switch for activating the motor, and also a parallel branch to the battery pack and the operating switch. A capacitor is arranged in the parallel branch. To lower the electrical contact load on the operating switch, provision is made to arrange an electronic switch, which is connected in series with the capacitor, in the parallel branch. The series circuit which includes the capacitor and the electronic switch has a first and a second end. The ends form the only electrical power connection of the capacitor to the main circuit. The electronic switch in the series circuit will apply a supply voltage, which is provided by the battery pack, to the capacitor only after a period of time following closing of the operating switch has elapsed. 1. A circuit arrangement for starting an electric motor of a hand guided work apparatus , the circuit arrangement comprising:an electric motor;a battery pack configured as an energy source;a mechanical operating switch configured to start said electric motor and said mechanical operating switch having an open switch position and a closed switch position;a main circuit which includes said electric motor, said battery pack and said mechanical operating switch;a capacitor;an electronic switch;a parallel circuit branch arranged in parallel to said battery pack and said operating switch;said parallel circuit branch including said capacitor and said electronic switch connected in series with each other and having first and second ends;said parallel circuit branch being configured such that said first end and said second end are the only electrical power connections of said capacitor to said main circuit; and,said electronic switch being configured to apply a supply voltage provided by said battery pack to said capacitor upon elapse of a predetermined time duration after said mechanical ...

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Номер записи: 46
13-03-2014 дата публикации

HANDHELD WORK APPARATUS HAVING A DRIVE CIRCUIT FOR AN ELECTRIC MOTOR WHICH DRIVES OSCILLATING TOOLS

Номер: US20140070737A1
Автор: Kloeker Jens, Luz Jochen
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus having an electric motor and a drive circuit for the electric motor. The rotation movement of the motor is converted into an oscillating movement of the work tool via a gear mechanism. The motor is situated in a circuit including at least the motor and a switch for operating the motor. To reduce wear of the gear mechanism, a control unit for operating the motor in one of two directions of rotation is provided. The control unit independently determines a selected direction of rotation for a next operating cycle as a function of a control variable. When the motor is started, the motor is started by the control unit in the direction of rotation which is associated with a value of the control variable. The control variable changes before the motor is restarted for a following operating cycle. The value of the control variable is independently determined again for the following operating cycle. 1. A handheld work apparatus comprising:a work tool;a gear mechanism;an electric motor configured to generate a rotational movement and to drive said work cool via said gear mechanism;said gear mechanism being configured to convert said rotational movement of said electric motor into an oscillating movement of said work tool;an electric circuit including said electric motor and a switch unit for operating said electric motor in a rotational direction;said electric circuit further including a drive circuit for said electric motor;said drive circuit including a control unit configured for the operating of said electric motor in one of a first rotational direction and a second rotational direction; and,{'sub': n', 'n+x, 'said control unit being further configured to independently determine a selected one of said rotational directions of said electric motor for a next operating cycle (B) in dependence upon a control variable and, when said electric motor is started, said electric motor is started in the rotational direction corresponding to a value of said ...

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Номер записи: 47
03-04-2014 дата публикации

ADJUSTMENT SAFEGUARD FOR A SET SCREW ON A CARBURETOR

Номер: US20140093329A1
Автор: Baumhauer Achim, Gernhard Walter, Levien Patrick
Принадлежит: ANDREAS STIHL AG & CO. KG

An adjustment safeguard for a set screw on a carburetor includes a cap held non-rotatably on the head of the set screw. The cap is surrounded by a coaxially positioned wall sleeve fixed to the housing. A rotation stop is fixed to the housing to limit the angle of rotation of the cap in the sleeve in the rotational direction of the set screw. A through-opening in the cap permits inserting a tool into an engagement opening in the head of the set screw to avoid destruction by introducing too much torque into the adjustment safeguard. The form and opening width of the through-opening is limited by the use of a metal material such that a tool larger than the adjustment tool is not able to be inserted through the through-opening into the head of the set screw. The engagement opening is flexible to limit a maximum allowable adjustment torque. 1. An adjustment safeguard for a set screw on a carburetor in a handheld work apparatus comprising:said carburetor having a carburetor housing defining a wall;said set screw having a head and defining an engagement opening and said set screw being rotatable in a rotational direction;a cap configured to be held in a rotatably fixed manner on said head of said set screw and said cap being rotatable through a rotational angle (S);a wall sleeve fixed to said carburetor housing and configured to be coaxial with said cap and surround said cap with a slight radial clearance;a rotation stop fixed to said carburetor housing to limit said rotational angle (S) of said cap in said wall sleeve;said cap defining a through opening to said engagement opening;said through opening having a shape and an opening width which are delimited by a metallic material; and,said engagement opening being configured to be flexible in at least one of said shape and said opening width so as to limit a maximum allowable adjustment torque.2. The adjustment safeguard of claim 1 , wherein said engagement opening is adapted to receive an adjustment tool for adjusting said ...

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Номер записи: 48
01-01-2015 дата публикации

AIR FILTER ARRANGEMENT HAVING A CARBURETOR

Номер: US20150000234A1
Автор: Hermann Karl-David, Herrmann Frederik, Zürcher Lukas
Принадлежит: ANDREAS STIHL AG & CO. KG

An air filter and carburetor arrangement includes a round filter and a round filter carrier having a filter plate. The round filter has a central filter axis, which lies at an angle to the filter plate. The carburetor has a carburetor body, in which an intake duct is configured with a duct longitudinal axis, and at one end of the intake duct on the carburetor body a filter connection side for the round filter carrier is configured, wherein the round filter carrier is fixed with at least one surface portion of the filter plate on the connection surface of the carburetor. The design is provided such that the duct longitudinal axis of the intake duct lies in the plane of the filter plate at a lateral distance (r) to the filter axis of the round filter fixed to the round filter carrier.

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Номер записи: 49
07-01-2016 дата публикации

Backpack sprayer and container for spraying agent for a backpack sprayer

Номер: US20160001310A1
Автор: Hans-Georg Wiedmann, Klaas Maximilian Heide, Klaus Langhans
Принадлежит: Andreas Stihl AG and Co KG

A backpack sprayer has a carrying arrangement, on which a container for spraying agent is arranged. The container has a filling opening which can be closed by way of a lid. The carrying arrangement has a set-down position, in which the carrying arrangement is set down on a planar, horizontal set-down surface. The spraying agent region of the container is the region which is provided for spraying agent and extends as far as a maximum permissible filling height (max). The spraying agent region has a greatest horizontal inner cross-sectional area (A) in the set-down position. In order to allow simple filling of spraying agent and simple cleaning of the container, it is provided that the container can be opened at the filling opening over at least 60% of its greatest inner cross-sectional area (A).

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Номер записи: 50
10-01-2019 дата публикации

Method for Assisting During Execution of a Sequence of Cuttings in a Tree, and System for Assisting During Execution of a Sequence of Cuttings in a Tree

Номер: US20190008099A1
Автор: Andreas Eppinger, Antonio KRAEMER FERNANDEZ, Benjamin FREY, Bettina Meier, Dirk Jaeger, Florian Eppinger, Friedrich Hollmeier, Harald Mang, Martin Tippelt, Michael Reinert, Steffen Kugel, Steffen Suepple
Принадлежит: Andreas Stihl AG and Co KG

A method assists during execution of a sequence of cuttings in a tree, wherein, during a cutting sequence, a first cut in the tree is followed by a second cut in the tree At least a part of an ideal course of the second cut depends on at least a part of a course of the first cut. The method includes the steps of: identifying at least the part of the course of the first cut in the tree; precalculating at least the part of the ideal course of the second cut in the tree based on the identified part of the course of the first cut; and outputting cutting information for executing the second cut based on the precalculated part of the ideal course of the second cut.

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Номер записи: 51
25-01-2018 дата публикации

Work apparatus with housing parts connected via a pivot joint

Номер: US20180023680A1
Автор: Benjamin BARTH, David Hampe, Jan Föhrenbach, Tobias Wörner, Ulrike Neumann
Принадлежит: Andreas Stihl AG and Co KG

A work apparatus has a gear unit which is arranged in a gear housing. The gear unit includes a drive part arranged in a first housing part of the gear housing and an output part arranged in a second housing part. The two housing parts are connected to each other via a pivot joint which permits pivoting of the second housing relative to the first housing part about a pivot axis. The pivot joint has a clamping device for bracing the two housing parts in the direction of the pivot axis. The force exerted with the clamping device on the two housing parts is adjustable via a clamping element. To avoid loosening or releasing of the clamping device even after frequent pivoting, the clamping element moves during clamping in the direction of a clamping axis which encloses an angle α which is more than 10° with the pivot axis.

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Номер записи: 52
29-01-2015 дата публикации

HAND-HELD WORK IMPLEMENT

Номер: US20150026988A1
Автор: Friedrich Sebastian, Knauss Jens, Kurzenberger Jan, Menzel Johannes
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held work implement comprises a housing, at least one tool and a combustion engine for driving the tool. The combustion engine has a cylinder and has a piston which drives a crankshaft in rotation about an axis of rotation. The crankshaft drives a fan impeller. The work implement has a handle unit with a handle bar and has an engine unit, these being connected to one another via anti-vibration elements. The combustion engine has a transverse plane which encompasses the cylinder longitudinal axis and which runs parallel to the axis of rotation of the crankshaft. The transverse plane divides the work implement into a front region, in which a section of the tool that projects out of the housing is arranged, and a rear region. The fixing of the anti-vibration element to the cylinder is realized in the front region. 1. A hand-held work implement , comprising:a housing,at least one tool anda combustion engine for driving the at least one tool, wherein the tool projects at least partially out of the housing of the work implement, wherein the combustion engine has a cylinder in which a piston is mounted so as to move in reciprocating fashion, wherein the piston drives a crankshaft in rotation about an axis of rotation, wherein the hand-held work implement has a fan impeller that is driven in rotation by the crankshaft, wherein the hand-held work implement has a handle unit and an engine unit which, for a vibration decoupling, are connected to one another via at least one anti-vibration element, wherein the engine unit comprises the combustion engine, wherein the anti-vibration element is fixed by way of a first end to a handle bar of the handle unit and by way of a second end to the cylinder of the combustion engine, wherein the combustion engine has a transverse plane which encompasses the cylinder longitudinal axis and which runs parallel to the axis of rotation of the crankshaft, and wherein the combustion engine has a central plane which is arranged perpendicular ...

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Номер записи: 53
29-01-2015 дата публикации

Handheld work apparatus and elastic connecting piece for a handheld work apparatus

Номер: US20150027396A1
Автор: Andreas Lingen, Christian Schmidt, Christina Escher, Daniel Diepolder, Jens Knauss, Juergen Bernert, Sebastian Friedrich
Принадлежит: Andreas Stihl AG and Co KG

A handheld work apparatus has at least one tool which is driven by a combustion engine. A portion of an intake channel of the combustion engine is formed by an elastic connecting piece which has a first section and a second section between which an expansion fold is arranged. The expansion fold has a first side wall and a second side wall arranged downstream of the first side wall. A peripheral wall, which extends in the region of the largest outside diameter (a) of the expansion fold, is arranged in flow direction between the first side wall and the second side wall. The connecting piece has a stop for the expansion fold which prevents a segment of the first side wall adjoining the peripheral wall from bearing against the second side wall.

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Номер записи: 54
29-01-2015 дата публикации

HANDHELD WORK APPARATUS

Номер: US20150027745A1
Автор: Friedrich Sebastian, Knauss Jens, Kurzenberger Jan, Menzel Johannes
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus has a motor unit comprising a drive motor. The drive motor drives a tool of the work apparatus, for example a saw chain. The apparatus has a grip unit with a handle that is vibrationally decoupled from the motor unit via an antivibration element. The antivibration element is connected to a first component of the grip unit via a holding device and a second component of the motor unit via a holding element. Arranged in the connection of the first component to the second component through the antivibration element is a predetermined breaking point formed in a third component that is replaceable independently of the first component and the second component. The strength of the connection of the first component to the second component through the antivibration element is lowest at this predetermined breaking point. 1. A handheld work apparatus comprising:a motor unit comprising a drive motor, wherein the drive motor drives a tool of the work apparatus;a grip unit comprising a handle, wherein the grip unit is vibrationally decoupled from the motor unit via an antivibration element, wherein the antivibration element is connected to a first component of the grip unit via a holding device, and wherein the antivibration element is connected to a second component of the motor unit via a holding element;a predetermined breaking point, wherein the predetermined breaking point is formed in a third component that is replaceable independently of the first component and the second component, wherein the predetermined breaking point is arranged in the connection of the first component to the second component through the antivibration element, and wherein the strength of the connection of the first component to the second component through the antivibration element is lowest at the predetermined breaking point.2. The work apparatus according to claim 1 ,wherein the predetermined breaking point is formed by a notch.3. The work apparatus according to claim 2 , ...

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Номер записи: 55
01-05-2014 дата публикации

PORTABLE WORK APPARATUS HAVING STRAPS

Номер: US20140115835A1
Автор: Kolb Joachim, Maier Alexander, Reber Volker
Принадлежит: ANDREAS STIHL AG & CO. KG

A portable work apparatus has a main unit and a work tool. The main unit is carried by the user via a strap. The strap has a fastening section which is secured to the main unit via a fastening element. The fastening section is held between a pressure surface of the fastening element and a fastening surface formed on the main unit. To prevent twisting of the strap when the fastening element is secured, provision is made for the fastening surface to be formed with a structure that increases the friction coefficient. The structure interacts with a bearing surface, facing the fastening surface, of the fastening section such that the fastening section, which is held in a clamped manner between the pressure surface of the fastening element and the fastening surface of the main unit, is prevented from rotating relative to the main unit. 1. A portable work apparatus comprising:a strap having at least one fastening section;a main unit configured to be carried by an operator via said strap;a fastening surface incorporated in said main unit;a work tool;a fixation element having a pressure surface;said strap being configured fixed to said main unit via said fixation element in such a manner that said fastening section of said strap is held between said pressure surface of said fixation element and said fastening surface of said main unit;said fastening section of said strap having a bearing surface which faces said fastening surface;said fastening section of said strap being configured to be held clamped between said pressure surface of said fastening element and said fastening surface of said main unit in a clamped position; and,said fastening surface having a friction increasing structure formed thereon to coact with said bearing surface of said fastening section in such a manner that a rotational movement of said fastening section relative to said main unit is prevented when said fastening section is clamped into said clamped position.2. The work apparatus of claim 1 , ...

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Номер записи: 56
06-02-2020 дата публикации

Method for starting a combustion engine

Номер: US20200040863A1
Автор: Clemens Klatt, Johannes Lang, Michael Unterkircher, Ulf Bannick
Принадлежит: Andreas Stihl AG and Co KG

A method is for the safe starting of a combustion engine in a handheld, portable work apparatus. When starting, start rpm limiting is activated when the rotational speed of the combustion engine exceeds an activation rotational speed that lies above the coupling rotational speed of a centrifugal coupling. After activating the start rpm limiting for at least one working cycle, an intervention in the ignition is carried out such that the rotational speed of the combustion engine decreases. After the rotational speed has decreased below a lower engagement rotational speed, an intervention in the ignition is carried out such that the rotational speed increases. If the rotational speed exceeds an upper engagement rotational speed, an intervention in the ignition is again carried out such that the rotational speed decreases. The upper engagement rotational speed and/or the lower engagement rotational speed is/are changed with an increasing number of consecutive working cycles.

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Номер записи: 57
19-02-2015 дата публикации

Guide Bar for a Saw Chain of a Motor-Driven Chain Saw and Application of a Marking on a Guide Bar of a Motor-Driven Chain Saw

Номер: US20150047491A1
Автор: Schamberg Guenther
Принадлежит: ANDREAS STIHL AG & CO. KG

A guide bar for a saw chain of a chain saw has a fastening section and a redirecting section. The guide bar has an imaginary longitudinal center axis extending from the fastening section to the redirecting section. The guide bar has at least one first marking in the form of a line. The first marking is inclined at an angle of about 20° to about 80° with respect to the longitudinal center axis when viewing the guide bar in side elevation. The first marking is used to estimate, during operation, the depth (t) of a groove produced by the saw chain in the workpiece in the case of a cut in which the longitudinal center axis of the guide bar is inclined at an angle of about 20° to about 80° to the surface of the workpiece. 117-. (canceled)18. A guide bar for a saw chain of a chain saw comprising:a guide bar body defining an imaginary longitudinal center axis and having a first end and a second end disposed opposite to said first end;said first end having a fastening section;said second end having a redirecting section;said imaginary center line extending from said fastening section to said redirecting section; and,at least one first marking having a linear shape and being inclined at an angle lying in a range of approximately 20° to approximately 80° with respect to said imaginary longitudinal center axis when said guide bar body is viewed in side elevation.19. The guide bar of claim 18 , wherein:said guide bar body has a total length (a) and defines a forward region extending from said redirecting section over at most half of said total length (a); and,said first marking is arranged in said forward region of said guide bar body.20. The guide bar of further comprising:a further first marking; andsaid first marking and said further first marking being inclined with respect to one another.21. The guide bar of claim 20 , wherein said first marking and said further first marking conjointly enclose an angle (h) lying in a range of approximately 5° to approximately 40°.22. The ...

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Номер записи: 58
26-02-2015 дата публикации

Guide bar for a saw chain having a reduced-wear direction-reversing section

Номер: US20150052762A1
Автор: Alexander Fuchs, Berthold Schell, David Mitrega, Jochen Buchholtz, Matthias Schulz, Norbert Apfel, Oliver Gerstenberger, Thomas Lux, Thomas Voigt
Принадлежит: Andreas Stihl AG and Co KG

A guide bar for a saw chain includes an elongate, flat base body made of a basic material. The base body extends along a longitudinal center axis and, in order to guide a saw chain, has a running surface formed on an outer periphery thereof and a guide groove formed in the outer periphery of the base body. The guide groove has a groove base. A direction-reversing section for the saw chain is provided at one end of the base body. The direction-reversing section includes at least one add-on component having a running surface made of more wear-resistant material than the basic material of the base body. The add-on component is secured to the base body of the guide bar by at least one weld seam. The weld seam extends between the add-on component and the base body and is located spatially beneath the groove base.

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Номер записи: 59
02-03-2017 дата публикации

Charging device for a battery pack

Номер: US20170063116A1
Автор: Friedhelm Koch, Gernot Liebhard, Thomas Heinrich
Принадлежит: Andreas Stihl AG and Co KG

A charging device for a battery pack has a housing defining a charging receptacle for accommodating the battery pack. Power electronics are arranged in the housing. A cooling air fan is provided in the housing which draws a suction air flow into the housing via an air inlet opening and blows the suction air flow out of the housing, as a first cooling air flow via an air outlet opening. A battery air flow flows through the battery pack and enters as a first cooling air flow via the air inlet opening. A further suction air flow is drawn into the housing from the surroundings of the housing via a further air inlet opening formed in the housing. The further suction air flow is formed as a second cooling air flow separate from the battery air flow. The power electronics are situated in the flow path between the second air inlet opening and the cooling air fan. The second cooling air flow, after cooling the power electronics, is supplied to the cooling air fan.

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Номер записи: 60
29-05-2014 дата публикации

Hand-guided power tool with internal combustion engine

Номер: US20140144396A1
Автор: Kraus Alexander, Kunert Niels, Rieber Martin, Wolf Gunter
Принадлежит: ANDREAS STIHL AG & CO. KG

A power tool has an internal combustion engine with a piston supported in the cylinder and delimiting a combustion chamber. A crankshaft is rotatably supported in the crankcase and driven by the piston. Combustion air is supplied to the combustion chamber via an intake passage that has a piston-controlled inlet opening and an intake section formed within the cylinder. The bottom of the intake section, when the cylinder axis is vertical and the crankcase is beneath the combustion chamber, connects lowermost points of passage cross-sections arranged in the intake section perpendicular to the flow direction. The bottom descends toward the crankcase when the longitudinal cylinder axis is vertical. A ramp arranged in the intake passage next to the inlet opening deflects a portion of flow flowing within the intake passage. The ramp, when the longitudinal cylinder axis is vertical, ascends in flow direction toward the crankcase. 1. A power tool comprising:an internal combustion engine;at least one tool member connected to the internal combustion engine so as to be driven by the internal combustion engine;the internal combustion engine having a cylinder with a longitudinal cylinder axis, wherein the cylinder has a cylinder bore;the internal combustion engine having a piston reciprocatingly supported in the cylinder bore and delimiting a combustion chamber in the cylinder;a crankcase connected to the cylinder;a crankshaft rotatably supported about an axis of rotation within the crankcase and connected to the piston so as to be driven in rotation by the piston;the internal combustion engine having an intake passage through which combustion air is supplied;the intake passage having a piston-controlled inlet opening that communicates with the crankcase;the intake passage having an intake section formed within the cylinder;the intake section having a bottom;the bottom, when the longitudinal cylinder axis is vertically positioned and the crankcase is arranged beneath the ...

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Номер записи: 61
24-03-2016 дата публикации

Filament cutterhead for a brushcutter

Номер: US20160081268A1
Автор: Achim Rethaber, Sven Lang
Принадлежит: Andreas Stihl AG and Co KG

A filament cutterhead is provided for mounting on the drive shaft of a brushcutter. The filament cutterhead includes a housing with a circumferential wall wherein a first wall opening for a cutting filament is formed. A filament spool arranged in the housing is rotatable relative to the housing. A filament channel with a filament inlet segment is provided in a partition wall of the filament spool. The filament channel extends from the filament inlet segment past the hub to a filament outlet segment which is assigned a second wall opening in the circumferential wall. The filament outlet segment is at an offset (v) with respect to the filament inlet segment in the circumferential direction of the hub. The mouth of the filament inlet segment and the mouth of the filament outlet segment lie within an outside diameter (A) of the partition wall and open into a pass-through space.

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Номер записи: 62
19-06-2014 дата публикации

Electric Shears

Номер: US20140165411A1
Автор: Binder Andreas
Принадлежит: ANDREAS STIHL AG & CO. KG

Electrical shears have a housing with an electric drive motor arranged in the housing. A motor shaft is connected to the drive motor. Blades are provided and at least one of the blades is connected to the motor shaft. The motor shaft acts on the at least one blade for opening or closing the blades. A manual actuating member with a guide member is guided in a translatory motion, wherein the guide member has a length extending in a direction of a straight actuating travel path of the manual actuating member. A control unit is provided that controls the drive motor as a function of an electric control signal, wherein the electric control signal represents a mechanical position of the manual actuating member. 1. Electrical shears comprising:a housing;an electric drive motor arranged in the housing;a motor shaft connected to the drive motor;blades, wherein at least one of the blades is connected to the motor shaft, wherein the motor shaft acts on the at least one blade for opening or closing the blades;a manual actuating member, wherein the manual actuating member comprises a guide member and is adapted to be guided in a translatory motion, wherein the guide member has a length extending in a direction of a straight actuating travel path of the manual actuating member;a control unit, wherein the drive motor, as a function of an electric control signal, is controlled by the electronic control unit and wherein the electric control signal represents a mechanical position of the manual actuating member.2. The shears according to claim 1 , wherein an actuating travel of the manual actuating member along the translatory actuating travel path and a closing angle of the blades are dependent on each other.3. The shears according to claim 2 , wherein the translatory actuating travel is proportional to the closing angle.4. The shears according to claim 1 , further comprising a guide structure claim 1 , wherein the guide member is disposed in the guide structure which is arranged ...

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Номер записи: 63
19-06-2014 дата публикации

Method for operating an internal combustion engine of a hand-guided power tool

Номер: US20140165964A1
Автор: Andresen Erik, Klein Alexander, Leufen Heinrich, Maier Georg, Redecker Jürgen
Принадлежит: ANDREAS STIHL AG & CO. KG

In a power tool, an internal combustion engine is coupled by a clutch to a tool member. An ignition control device is provided that for each engine speed of the internal combustion engine specifies at least one ignition timing. For each engine speed of a first engine speed range a correlated first ignition timing is specified, wherein each first ignition timing is an ignition timing of a first ignition timing range. For each engine speed of a second engine speed range, adjoining the first engine speed range, a correlated second ignition timing is specified, wherein each second ignition timing is an ignition timing of a second ignition timing range. The first ignition timing is retarded by at least 5° crank angle relative to the second ignition timing. The first engine speed range extends at least from the coupling engine speed range to the limit engine speed of approximately 7,000 RPM. 1. A method for operating an internal combustion engine of a hand-guided power tool , wherein the power tool has a clutch and at least one tool member , wherein the clutch engages at a coupling engine speed and wherein the internal combustion engine at engine speeds above the coupling engine speed is operatively connected by the clutch to the tool member , wherein the internal combustion engine has a cylinder and a piston supported reciprocatingly in the cylinder , wherein the piston drives in rotation a crankshaft which is rotatably supported in a crankcase of the internal combustion engine , wherein the internal combustion engine has an ignition control device that for each engine speed of the internal combustion engine specifies at least one ignition timing; the method comprising:specifying for each engine speed of a first engine speed range a correlated first ignition timing, wherein each first ignition timing is an ignition timing of a first ignition timing range;specifying for each engine speed of a second engine speed range, adjoining the first engine speed range, a correlated ...

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Номер записи: 64
19-06-2014 дата публикации

WORK APPARATUS

Номер: US20140166325A1
Автор: Goetzel Arne, Haeberlein Juergen
Принадлежит: ANDREAS STIHL AG & CO. KG

A work apparatus has a drive motor for driving a work tool and has a control unit for the drive motor. The operating device includes an actuating element actuated by a user. The actuating element is mounted in a movable manner in a housing and can be adjusted in an actuating direction between a zero position and a maximum position. An intermediate stop acts between the zero position and the maximum position. The position of the intermediate stop is settable via a setting element. After the intermediate stop has been reached, the actuating element can be actuated further as far as the maximum position. The operating force (F) for further actuating the actuating element increases when the intermediate stop is reached. Provision is made for the operating force (F) to drop again upon further actuation of the actuating element after the intermediate stop has been overcome. 1. A work apparatus comprising:a work tool;a drive motor configured to drive said work tool;a control unit for said drive motor having a actuating element for actuation by a user;a housing;said actuating element having an actuating direction and being movably mounted in said housing via an application of an actuating force (F);said actuating element being configured to be displaceable from a zero position up to a maximum position;a setting element;an intermediate stop configured to act at a position between said zero position and said maximum position;said setting element being configured to set said position of said intermediate stop; and,said actuating element is further configured to interact with said intermediate stop so as to cause said actuating force (F) to increase when said actuating element reaches said intermediate stop and decreases once said intermediate stop is overcome with further actuation of said actuating element toward said maximum position.2. The work apparatus of claim 1 , wherein said actuating force (F) claim 1 , after said intermediate stop has been overcome claim 1 , is less ...

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Номер записи: 65
26-06-2014 дата публикации

HANDHELD WORK APPARATUS HAVING A DRIVE MOTOR FOR DRIVING A WORK TOOL AND METHOD FOR OPERATING SAID APPARATUS

Номер: US20140174772A1
Автор: Heinzelmann Georg, Kaupp Klaus, Mandalka Markus
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus has a drive motor for driving a tool, an operating element for operating the drive motor, a first inhibiting unit and a second inhibiting unit. Each inhibiting unit has a disable state and an enable state. The operating element is inhibited for operating the drive motor when at least one of the inhibiting units is in its disable state. The work apparatus further has a locking device which locks the first inhibiting unit in its enable state if the second inhibiting unit is in its enable state. A method for operating the work apparatus provides that the first inhibiting unit is locked in its enable state when the first inhibiting unit and the second inhibiting unit are situated in their enable states at the same time. 1. A handheld work apparatus comprising:a work tool;a drive motor for driving said work tool;an operating element for facilitating operation of said drive motor by an operator;a first inhibiting unit having a disable state and an enable state;a second inhibiting unit having a disable state and an enable state;said operating element being disabled when at least one of said inhibiting units is in the disable state corresponding thereto; and,a locking device configured to lock said first inhibiting unit in said enable state thereof when said second inhibiting unit is in said enable state thereof.2. The handheld work apparatus of claim 1 , further comprising a blocking device configured to block a shift of said second inhibiting unit into said enable state thereof when said first inhibiting unit is in said disable state thereof.3. The handheld work apparatus of claim 2 , wherein said blocking device includes an inhibiting contour for blocking the shift of said second inhibiting unit into said enable state thereof.4. The handheld work apparatus of claim 1 , wherein said first and second inhibiting units define respective actuation directions lying transversely to each other.5. The handheld work apparatus of claim 1 , wherein said ...

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Номер записи: 66
19-03-2020 дата публикации

Rechargeable Battery Pack

Номер: US20200091476A1
Автор: Alexander Nordmann, Daniel Wagner, Joachim Kolb, Markus Herrmann
Принадлежит: Andreas Stihl AG and Co KG

A rechargeable battery pack supplies electrical energy to hand-held power tools. The battery pack is designed for selective use in a vertical use position or a horizontal use position, and includes an external housing which has a housing base and a housing hood, which is connected to the housing base, and surrounds an interior space, and a rechargeable battery cell block which is arranged in the interior space. The battery pack has a water discharge structure for discharging water which is contained in the interior space and/or water which enters the external housing from the outside. The water discharge structure has, on at least one side of the external housing, a double-labyrinth wall structure which is open to liquid and has an outer labyrinth wall structure, which is formed by overlapping respectively of an outer side wall of the housing base and of the housing hood, and an inner labyrinth wall structure, which is arranged offset in relation to the outer labyrinth wall structure in the direction of the interior space and which is formed by overlapping respectively of an inner side wall of the housing base and of the housing hood.

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Номер записи: 67
13-04-2017 дата публикации

Guide Bar

Номер: US20170100852A1
Автор: Werner Galster
Принадлежит: Andreas Stihl AG and Co KG

A guide bar for a saw chain has oppositely arranged outer side faces facing away from each other. A guide groove is formed on a peripheral edge of the guide bar and receives and guides the saw chain. The guide bar has a longitudinal center axis and extends lengthwise in a length direction along the longitudinal center axis. A rearward clamping end is provided for securing the guide bar. A leading deflecting section deflects the saw chain and the deflecting section is arranged opposite the rearward clamping end in the length direction. A cutout is formed between the rearward clamping end and the leading deflecting section. A weight-reducing insert is inserted into the cutout and is provided with external elevations that are projecting past a plane of the sides faces of the guide bar.

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Номер записи: 68
20-04-2017 дата публикации

Two-stroke engine and production series of two-stroke engines

Номер: US20170107895A1
Автор: Hannah Thoelking
Принадлежит: Andreas Stihl AG and Co KG

A two-stroke engine has a cylinder and a transfer channel which, in the region at bottom dead center of a piston, establishes a flow connection between a crankcase interior and the combustion chamber. The crankcase has a crankcase connecting flange for connecting to the cylinder, which has a first connecting opening and a second connecting opening. The transfer channel passes into the crankcase at the first connecting opening or the second connecting opening. At the other of the first and second connecting openings, no transfer channel passes into the crankcase. For a production series of two-stroke engines, provision is made, in one two-stroke engine of the series, which has a first cylinder, for a second connecting opening to be closed off from the cylinder, and, in one two-stroke engine of the series, which has a second cylinder, for the first connecting opening to be closed off by the cylinder.

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Номер записи: 69
27-05-2021 дата публикации

Device for Recording Operating Data of a Motorized Tool, System and Method for Operating a Device

Номер: US20210157505A1
Автор: André VAAS, Kay-Steffen Gurr, Michael GRAMM, Michael Kaiser
Принадлежит: Andreas Stihl AG and Co KG

A device records operating data of a motorized tool. The device is arranged on the tool, wherein the device has: a recording and/or evaluation device, wherein the recording and/or evaluation device is designed to record at least one variable, wherein the variable is dependent on an operating state of the tool, and to evaluate the recorded variable in order to identify the operating data, and/or to record the operating data. An operating data memory is provided, wherein the operating data memory is designed to store the identified and/or recorded operating data. A communication interface is designed, in a state connected to an external appliance, to wirelessly transmit the stored operating data thereto. The device is designed, if at least one connection criterion is met by the operating data and/or at least one connection criterion is met, wherein the connection criterion is the fact that the operating data have not been erased from the operating data memory and/or have not been transmitted, to wirelessly transmit connection information in a transmission state different from the connection state by way of the communication interface and/or to output the connection information by way of an output device of the device.

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Номер записи: 70
11-05-2017 дата публикации

HEDGE TRIMMER

Номер: US20170127619A1
Автор: Rosskamp Heiko
Принадлежит: Andreas Stihl AG & Co KG

A cutting tool has a housing. A blade bar projects forwards from the housing along a longitudinal axis. An electric drive motor drives the blade bar. At least one battery supplies the drive motor with electrical energy. The blade bar, the drive motor and the battery are mounted on the housing. The cutting tool has a top handle arranged above a center of gravity of the hedge trimmer, and a rear handle arranged behind the hedge-trimmer center of gravity. The battery is arranged on the housing at least mainly in front of the rear handle. 1. An outdoor power tool comprising:a main housing having an upper side and a lower side, the upper and lower side being defined when the tool is in a horizontal orientation with a longitudinal axis of the blade bar substantially parallel to the ground;a blade bar projecting forward from the housing along the longitudinal axis;an electric drive motor for driving the blade bar arranged within the housing;at least one battery for supplying the drive motor with electrical energy arranged mainly within an outer contour of the housing; anda top handle arranged above a center of gravity of the outdoor power tool when the tool is in a horizontal orientation with the longitudinal axis of the blade bar substantially parallel to the ground, anda rear handle formed integrally with the housing and arranged behind the outdoor power tool center of gravity and the top handle when the tool is in a horizontal orientation with the longitudinal axis of the blade bar substantially parallel to the ground, the battery being arranged on the housing at least mainly in front of the rear handle, the housing having a receptacle for interchangeably accommodating the battery, wherein the receptacle has an interface for the battery that is generally accessible from the upper side of the housing, such that the battery can be inserted into an opening of the receptacle at the upper side of the housing and connected to the interface with the battery received at least ...

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Номер записи: 71
07-08-2014 дата публикации

HEDGE TRIMMER

Номер: US20140215833A1
Автор: Heinzelmann Georg
Принадлежит: Andreas Stihl AG & CO.KG

A hedge trimmer having a drive motor, a gear mechanism, and a blade arrangement with at least one cutter bar, which is driven in a reciprocating manner by the drive motor via the gear mechanism in a longitudinal direction. The blade arrangement includes a guide mechanism that extends over at least a part of the length of the blade arrangement. The guide mechanism is embodied as a molded part that includes a generally flat fastening portion and a profiled guide portion. The cutter bar is longitudinally movably held on the guide portion. 1. A hedge trimmer , comprising:a drive motor;a gear mechanism; anda blade arrangement having at least one cutter bar and a free end, wherein said at least one cutter bar is driven in a reciprocating manner in a longitudinal direction of said blade arrangement by said drive motor via said gear mechanism, further wherein said blade arrangement includes a guide means, wherein the blade arrangement is connected with a supporting component of the hedge trimmer via the guide means, wherein said guide means is embodied as a molded part that includes a generally flat fastening portion and a profiled guide portion, wherein the guide portion extends approximately to the free end of the blade arrangement, wherein the blade arrangement is longitudinally moveably held to the guide portion.2. A hedge trimmer according to claim 1 , wherein said profiled guide portion is provided with a ribbing.3. A hedge trimmer according to claim 2 , wherein said ribbing includes at least one transverse rib that extends transverse to the longitudinal direction of said blade arrangement.4. A hedge trimmer according to claim 3 , wherein a plurality of said transverse ribs are provided claim 3 , and wherein said transverse ribs are more densely disposed in a region of said guide portion that faces said fastening portion than in a region of said guide portion that is remote from said fastening portion.5. A hedge trimmer according to claim 2 , wherein said ribbing ...

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Номер записи: 72
07-08-2014 дата публикации

Carburetor for a hand-guided power tool and hand-guided power tool

Номер: US20140216402A1
Автор: Antonio Fattorusso, Arne Götzel, Jörg AMANN, Kai Oppenländer
Принадлежит: Andreas Stihl AG and Co KG

A carburetor for a hand-guided power tool has a carburetor housing and a carburetor rotor supported rotatably in the carburetor housing about an axis of rotation. A needle is disposed on the carburetor rotor and projects into a fuel opening of the carburetor. An adjusting element is operatively connected to the needle so as adjust a position of the needle relative to the carburetor rotor. The adjusting element has an engagement contour that is to be engaged by a tool for adjusting the adjusting element. A securing contour that is fixedly connected to the carburetor rotor is provided. The securing contour, at any point of the securing contour, has a spacing to the axis of rotation of at least approximately 10 mm.

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Номер записи: 73
23-04-2020 дата публикации

System for Analyzing Operation of a Hand-Guided Working Apparatus and Method for Analyzing Operation of a Hand-Guided Working Apparatus

Номер: US20200126319A1
Автор: Claus Naegele, Friedrich Hollmeier, Michael GRAMM, Michael Unterkircher, Patrick Ruß, Tommy Roitsch
Принадлежит: Andreas Stihl AG and Co KG

A system for analysis of operation of a hand-guided working apparatus, wherein the working apparatus includes a working tool and a drive system for driving the working tool, includes an optical recording device configured for recording a temporal succession of images of a working procedure on a workpiece using the working tool, an identification device configured for identifying a temporal succession of operational data values of the drive system during recording of the temporal succession of images, and at least one output device configured for outputting in each case at least one of the recorded images together with at least one identified operational data value correlated in time thereto.

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Номер записи: 74
03-06-2021 дата публикации

Plug Connector for Electrically Connecting a Tag Connector to an Electrical Line of a Motor-Driven Garden and/or Forestry Working Apparatus, and Motor-Driven Garden and/or Forestry Working Apparatus

Номер: US20210167525A1
Автор: Georg Maier, Mario HAEFELE, Michael Schneider, Rolf Walter
Принадлежит: Andreas Stihl AG and Co KG

A plug connector for electrically connecting a tag connector to an electrical line of a motor-driven garden and/or forestry working apparatus includes a tag connector receptacle portion and a line receptacle portion. The tag connector receptacle portion has a first surface-clamping leg, a second surface-clamping leg, a first peripheral guiding blade and a second peripheral guiding blade, wherein the surface-clamping legs are disposed so as to be opposite one another and wherein the peripheral guiding blades are disposed so as to be opposite one another. The tag connector receptacle portion is configured for elastically enlarging a leg spacing between the surface-clamping legs and for plastically enlarging a blade spacing between the peripheral guiding blades by interaction between the peripheral guiding blades and the tag connector for receiving the tag connector and for contacting and for impinging with a clamping force opposite surfaces of the received tag connector by the surface-clamping legs, and for contacting opposite peripheries of the received tag connector by the peripheral guiding blades for securing the received tag connector against being released from the tag connector receptacle portion and for electrical contacting. The line receptacle portion is electrically connected to the tag connector receptacle portion. The line receptacle portion is configured for receiving the electrical line and for securing the received line against being released from the line receptacle portion and for electrical contacting.

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Номер записи: 75
26-05-2016 дата публикации

Power Saw System and Cable Assembly for a Power Saw

Номер: US20160144530A1
Автор: Benjamin FREY, Georg Heinzelmann, Harald Mang, Jonas Lank, Markus Weinig, Martin Failenschmid, Simon Jug
Принадлежит: Andreas Stihl AG and Co KG

A power saw system has a power saw with housing; guide bar; and saw chain driven about the guide bar by an electric drive motor. A battery is arranged outside of the housing. A power cable is connected with its first end through an electrical connection to the battery and with the second end to the drive motor to supply the drive motor with power. An elastic securing element is connected by a fastening element to the housing. A connecting device connects by a mechanical connection the securing element to an operator of the power saw. The connecting device has an overload protection separating the mechanical connection between securing element and operator when a maximum pulling force is surpassed. Securing element and power cable form a cable assembly. A pull-out force for separating the electrical connection is smaller than the maximum pulling force.

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Номер записи: 76
30-04-2020 дата публикации

Solenoid Valve and Method for Operating a Solenoid Valve

Номер: US20200132214A1
Автор: Jens Ramler, Klaus Geyer
Принадлежит: Andreas Stihl AG and Co KG

A solenoid valve has a valve housing, a magnetic core, and an armature plate interacting with the magnetic core and actuating a valve body. The solenoid valve has first and second travel positions defined by first and second distances measured between armature plate and magnetic core, respectively. The first distance is longer than the second distance. Flow through the solenoid valve is possible in one of the first and second travel positions and blocked in the other. The armature plate has a travel from first to second travel position and has an intermediate position located between first and second travel positions. A first spring element acts on the armature plate across the entire travel from first to second travel position. A second spring element acts additionally on the armature plate and begins acting from the intermediate position of the armature plate onward toward the second travel position.

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Номер записи: 77
24-06-2021 дата публикации

Trimmer Head with Residual Trimmer Line Indicator

Номер: US20210185909A1
Автор: Florian Hoche
Принадлежит: Andreas Stihl AG and Co KG

A trimmer head for mounting on a drive shaft of a trimmer has a housing and a trimmer line spool for winding and unwinding a trimmer line. The trimmer line spool is rotatably supported in the housing about an axis of rotation. The trimmer line spool has a first rotational direction in relation to the housing and a second rotational direction in relation to the housing, wherein the second rotational direction is opposite to the first rotational direction. A counting device detects a residual trimmer line length of the trimmer line remaining on the trimmer line spool. The counting device is connected to the trimmer line spool such that the counting device counts up when the trimmer line spool rotates in relation to the housing in the first rotational direction and counts down when the trimmer line spool rotates in relation to the housing in the second rotational direction.

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Номер записи: 78
11-09-2014 дата публикации

Trimmer Head for a Trimmer

Номер: US20140250699A1
Автор: Häberlein Jürgen, Keller Katharina, Neumaier Thomas, Stark Thomas, Weimer Ina
Принадлежит: ANDREAS STIHL AG & CO. KG

A trimmer head for a trimmer has a base member having a trimmer line opening. A clamping device arranged in the base member clamps a trimmer line that defines a cutting plane when rotated. The clamping member of the clamping device is rotatably disposed on a pivot bolt having a pivot axis positioned in a plane that is parallel to the cutting plane. The clamping member is spring-loaded by a clamping spring into a clamping position. The trimmer line is secured in the clamping position between a clamping surface and the clamping member. A centrifugal force acting on the trimmer line loads the clamping member in the clamping position. A U-shaped bracket has bracket legs connected by a stay. The clamping member is positioned between the bracket legs. The pivot bolt is supported on the bracket leg ends. The stay of the U-shaped bracket forms the clamping surface.

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Номер записи: 79
11-09-2014 дата публикации

GUIDE BAR HAVING A CARBON FIBER REINFORCED PLASTIC INSERT

Номер: US20140250701A1
Автор: Amend Helmar, Fuchs Alexander, Lank Jonas, Rominger Christine, SCHULZ Matthias, Uhl Klaus-Martin, von Hiller Christoph
Принадлежит: ANDREAS STIHL AG & CO. KG

A guide bar for a chain saw has an elongate main body of steel. The main body has flat sides and upper and lower peripheries defining a guide groove for a saw chain. An elongate window is formed in the main body between the peripheries and is filled with an insert made of a fiber composite material made up of resin and fibers. The fibers are in the direction of the longitudinal axis of the main body. The insert includes a plurality of fiber layers that are bonded with resin. A central layer is formed from a fiber layer and the fibers thereof are at an angle to the longitudinal axis. Two fiber layers having fibers oriented in the direction of the longitudinal axis of the main body are on both sides of the central layer. The inner fiber layers are covered outwardly by a woven fabric.

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Номер записи: 80
11-09-2014 дата публикации

HANDHELD WORK APPARATUS HAVING A TENSIONING DEVICE FOR A CHAIN

Номер: US20140250702A1
Автор: Lank Jonas, Zimmermann Helmut
Принадлежит: ANDREAS STIHL AG & CO. KG

A handheld work apparatus has a guide bar having a periphery along which a chain runs. The work apparatus has a housing and a fastening arrangement for fixing the guide bar to the housing. The fastening arrangement has an actuating device which can be actuated in a fastening direction in order to fix the guide bar. The work apparatus has a tensioning device to tension the chain. The tensioning device includes a tensioning spring. When the fastening arrangement is loosened, the tensioning spring exerts a force in a tensioning direction of the chain on the guide bar. Simple operation and a simple construction are achieved if the tensioning spring is in operative connection with the actuating device and is tensioned during actuation of the actuating device in the fastening direction.

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Номер записи: 81
11-09-2014 дата публикации

Coil Support for a Trimmer Line Coil

Номер: US20140252152A1
Автор: Garstenauer Andreas, Pearson Robert Jamieson, Schilling Thorsten, Smagin Vladimir A.
Принадлежит: ANDREAS STIHL AG & CO. KG

A coil support with a coil of a trimmer line has a coil core with an outer wall surface and first and second axial ends. At the axial ends securing elements that project past the wall surface of the coil core are provided for positional fixation of the coil wound onto the coil core. A securing element provided at the first axial end is a support plate with a longitudinal center axis. The size of the support plate is provided in the direction of the longitudinal center axis with a greater extension than transverse to the longitudinal center axis such that the support plate in a first radial direction of the coil core is greater than in a second radial direction. The coil core is fixedly connected with the support plate and with the further securing elements that are provided on the second axial end.

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Номер записи: 82
30-05-2019 дата публикации

Method for Operating a Wireless Transmitter and a Wireless Receiver, and System

Номер: US20190166487A1
Автор: Patrick Ruß, Tommy Roitsch
Принадлежит: Andreas Stihl AG and Co KG

A method for operating a wireless transmitter and a wireless receiver, wherein the wireless transmitter is assigned to a tool and is adapted to detect an operation condition of the tool and to send an operation condition signal as a function of the detected operation condition. The wireless receiver is assigned to an apparatus and is adapted to receive the sent operation condition signal and to control an operation condition of the apparatus as a function of the received operation condition signal. The method assigns the wireless transmitter and the wireless receiver by a user-operated, electric assignment apparatus such that the receiver controls the operation condition of the apparatus as a function of the received operation condition signal. The assignment apparatus is separate from the transmitter and the receiver.

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Номер записи: 83
18-09-2014 дата публикации

INTERNAL COMBUSTION ENGINE HAVING AN INTAKE DEVICE

Номер: US20140261277A1
Автор: GRETHER Michael, Volckart Lutz
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine has an intake device having an air filter and at least one port. Combustion air is sucked in from the clean side of the air filter to the internal combustion engine via the port. The intake device has air trunking, in which at least a first section and a second section of the port are guided. The air trunking has a longitudinal center axis, wherein combustion air flows in the first section of the port in a first direction of flow running in the direction of the longitudinal center axis. The combustion air flows in the second section of the port in a second direction of flow oriented in an opposite direction to the first direction of flow and in the direction of the longitudinal center axis. As a result, a compact overall size is achieved with port length. 1. An internal combustion engine comprising:an intake device, wherein the intake device has an air filter and at least one port, via which combustion air is sucked in from a clean side of the air filter to the internal combustion engine,wherein the intake device has air trunking, in which at least a first section and a second section of the port are guided, wherein the air trunking has a longitudinal center axis, wherein the combustion air flows in the first section of the port in a first direction of flow which runs in the direction of the longitudinal center axis, and wherein the combustion air flows in the second section of the port in a second direction of flow which is oriented in the opposite direction to the first direction of flow and in the direction of the longitudinal center axis.2. The internal combustion engine according to claim 1 , wherein the air trunking extends through the air filter.3. The internal combustion engine according to claim 2 , wherein the first section and the second section of the port extend through the air filter claim 2 , and a third section of the port is guided in the air trunking claim 2 , wherein the direction of flow in the third section ...

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Номер записи: 84
13-06-2019 дата публикации

Assembly for filling a gas tank

Номер: US20190178267A1
Автор: Georg Heinzelmann, Malte Hartmann, Manuel Dangelmeier
Принадлежит: Andreas Stihl AG and Co KG

An assembly is for filling a gas tank for a combustion engine from a gas-filled storage bottle via a filling device arranged between the tank and the storage bottle. The tank has at least one fill valve for liquefied gas, a pressure relief valve for gas in the gaseous state, and an extraction valve for liquefied gas. The filling device has a gas connection for the storage bottle and has a fill connection for the fill valve. For filling the tank, the fill valve is connected via the filling device to the storage bottle, such that, when the fill valve is open, liquefied gas flows from the storage bottle via the fill valve into the tank. During the inflow of liquefied gas, the pressure relief valve of the tank is at least intermittently open. A filling level gauge is provided for indicating a predefined filling level in the tank.

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Номер записи: 85
02-10-2014 дата публикации

HAND-HELD WORK IMPLEMENT AND PROCESS FOR PRODUCING A BRAKING DEVICE OF A HAND-HELD WORK IMPLEMENT

Номер: US20140291080A1
Автор: Apfel Norbert, Cornelsen Ralf, Schumacher Manfred
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held work implement having a tool has a braking device for the tool that includes a brake band which wraps around a brake drum. The brake band and the brake drum undergo friction as they move relative to one another during braking. At least one of the band or drum comprises an austenitic steel, a duplex steel, super duplex steel, a nickel-base alloy or a cobalt-base alloy and has a base body and a marginal layer. The hardness of the marginal layer is approximately 150% to approximately 600% of the hardness of the base body and the carbide proportion in the marginal layer is less than approximately 0.5% by weight. A process for production of the foregoing includes diffusing carbon and/or nitrogen into a marginal layer at a temperature of less than 500° C. 1. A hand-held work implement comprising a tool and a braking device for the tool ,wherein the braking device comprises a brake band, which wraps around a brake drum, wherein the brake band and the brake drum form a first part and a second part undergoing friction which move relative to one another during the braking operation, wherein the first part undergoing friction is an austenitic steel, a duplex steel, super duplex steel, a nickel-base alloy or a cobalt-base alloy, wherein the first part undergoing friction has a base body and a marginal layer, wherein the hardness of the marginal layer is approximately 150% to approximately 600% of the hardness of the base body, and wherein the carbide proportion in the marginal layer is less than approximately 0.5% by weight.2. The hand-held work implement according to claim 1 , wherein the marginal layer has a thickness of approximately 5 μm to approximately 50 μm.3. The hand-held work implement according to claim 1 , wherein the nitride proportion in the marginal layer is less than approximately 1%.4. The hand-held work implement according to claim 1 , wherein the carbon content in the marginal layer is approximately 1% by weight to approximately 7% by weight.5. ...

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Номер записи: 86
27-07-2017 дата публикации

Cutting Knife for a Cutting Head of a Trimmer

Номер: US20170208740A1
Автор: David Gunther, Fabian Pöhler
Принадлежит: Andreas Stihl AG and Co KG

The cutting knife has a base member with first and second faces. One face has a topographic disturbance element arranged between knife edge and longitudinal center axis and shaping the elevation profile of the face. On the opposite face relative to the center plane an opposite elevation profile with contour line is formed. The contour line points of the contour line of the first elevation profile are positioned opposite the contour line points of the opposite contour line on perpendiculars to the center plane. The contour line of the first elevation profile and the opposite contour line are noncongruent. The contour line of the first elevation profile extends transversely to the longitudinal center axis of the base member across the disturbance element and has an ascending line section and a descending line section. A turning point positioned between these line sections is a component of the disturbance element.

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Номер записи: 87
09-10-2014 дата публикации

METHOD FOR OPERATING AN INTERNAL COMBUSTION ENGINE

Номер: US20140299098A1
Автор: Klatt Clemens, Raffenberg Michael
Принадлежит: ANDREAS STIHL AG & CO. KG

An internal combustion engine includes a cylinder and a piston journalled to reciprocate therein. The cylinder and piston conjointly delimit a combustion chamber into which a spark plug projects. Ignition of the spark plug occurs at an ignition time point controlled by a control unit. The ignition time point is controlled in an idle speed range according to an idle control having a most advanced ignition time point. The engine has a decompression valve which, when open, connects the combustion chamber to a pressure relief space. The valve is open during engine start and closes when pressure in the combustion chamber exceeds a closing pressure. To close the valve, the ignition occurs in the idle speed range for an engine cycle departing from the idle control at a closing ignition time point lying approximately 5° crankshaft angle ahead of the most advanced ignition time point. 1. A method for operating an internal combustion engine including:a piston and a cylinder having a combustion chamber delimited by said piston;said piston being journalled so as to carry out a reciprocating back and forth movement in said cylinder;a crankcase and a crankshaft rotatably mounted in said crankcase and driven by said piston;a spark plug projecting into said combustion chamber;a starter device for starting said engine;a control unit for controlling the ignition time point (ZZP) of the ignition of said spark plug;a decompression valve defining a closed state and an open state wherein said decompression valve connects said combustion chamber to a pressure relief space;said decompression valve being configured to be in said open state when said engine is started and in said closed state when a pressure (p) in said combustion chamber exceeds a predetermined closing pressure (p1);said method comprising the steps of:controlling said ignition time point (ZZP) in an idle speed range in accordance with an idle control having a most advanced ignition time point (ZZP1); and,causing the ...

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Номер записи: 88
12-08-2021 дата публикации

Cutting Chain for Cutting Mineral or Metallic Materials

Номер: US20210245396A1
Автор: Matthias Schulz
Принадлежит: Andreas Stihl AG and Co KG

A cutting chain for cutting mineral or metallic materials has central drive links with a projection. Pairs of two side members are positioned laterally at the central drive links. The central drive links and the side member pairs are pivotably connected to each other. At least two cutting members are arranged sequentially in running direction of the cutting chain and each have one pair of side members and an abrasive cutting element connecting the two side members to each other. A drive link is arranged between the two cutting members and the projection of the drive link projects into a space between the cutting elements. The cutting chain has a cutout arranged such that a maximum sag of the cutting chain, at which the projection of the drive link comes into contact with one of the cutting elements, is enlarged compared to the same cutting chain without cutout.

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Номер записи: 89
09-08-2018 дата публикации

Cutter Head for a Brushcutter

Номер: US20180220583A1
Автор: David Gunther
Принадлежит: Andreas Stihl AG and Co KG

A cutter head for a brushcutter has a base member with top and bottom base member parts and rotates about an axis of rotation in operation. The top base member part is fixed to the brushcutter shaft end. The bottom base member part is screwed by a screw element to the shaft end. A bearing element is arranged in the base member radially spaced to the axis of rotation. A cutting tool is secured by the bearing element to the base member between top and bottom base member parts. The bearing element is secured either to bottom or top base member part and arranged relative to the other one such that the bearing element is constructively unhindered to move relative to the other base member part at least circumferentially and such that the bottom base member part for mounting or demounting is rotatable relative to the top base member part.

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Номер записи: 90
19-08-2021 дата публикации

Hand-Guided Gardening, Forestry and/or Construction Processing Device and Method for Operating a Hand-Guided Gardening, Forestry and/or Construction Processing Device

Номер: US20210251151A1
Автор: Alexander Haas, Heinrich Leufen, Philippe BUERCKEL, Simon KLAIBER
Принадлежит: Andreas Stihl AG and Co KG

A hand-guided gardening, forestry and/or construction processing device includes a processing tool, an electric motor drive system, wherein the electric motor drive system is designed to drive the processing tool, a user-adjustable operating element, and a control device. The control device is designed to control a target slope rate of a rotational speed of the electric motor drive system in dependence on a position of the operating element according to at least one allocation in such a way that maximum target slope rates of the rotational speed differ for different positions.

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Номер записи: 91
08-09-2016 дата публикации

System module which can be carried on the back and has a carrying arrangement and a fold-down hip portion

Номер: US20160255942A1
Автор: Daniel Wagner, Markus Zeller, Martin Lambe, Patrick Behringer
Принадлежит: Andreas Stihl AG and Co KG

The invention relates to a system module, which is carried on the back, for a work tool. The system module has a stand surface for setting down the system module in an upright manner. A carrying arrangement for the system module has at least one back panel and at least one shoulder strap. The back panel is formed with an upper shoulder portion and with a lower back portion. The back panel is extended beyond the back portion by a hip portion. The hip portion can be pivoted relative to the back portion about a movement axis. The movement axis extends at the level of the stand surface of the system module.

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Номер записи: 92
06-08-2020 дата публикации

Handheld Work Apparatus

Номер: US20200246957A1
Автор: Jan Rieger, Sebastian Hanussek
Принадлежит: Andreas Stihl AG and Co KG

A handheld work apparatus includes a work tool, a belt drive, a drive motor configured to drive the work tool via the belt drive, a brake unit configured to act on the belt drive, and a holding arrangement. The brake unit has a braking position and a released position and the holding arrangement is configured to hold the brake unit in the released position. The holding arrangement includes an electromagnet to which current is supplied during operation of the work apparatus.

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Номер записи: 93
04-12-2014 дата публикации

Hand-held power tool with an internal combustion engine

Номер: US20140352660A1
Автор: Gräter Werner, Kurzenberger Jan
Принадлежит: ANDREAS STIHL AG & CO. KG

A hand-held power tool has an internal combustion engine provided with a throttle trigger adjustable between an idle position and a full throttle position. The engine has an operating mode selector adjustable between an operating position and a start position. In an intake passage of the engine, a throttle element is arranged that is in a throttling position when the operating mode selector is in the start position. The throttle element is secured in the throttling position by a locking action. The locking action is released when the throttle trigger is moved from the idle position toward the full throttle position. A restoring element is coupled permanently to the position of the throttle trigger. The restoring element, when the throttle trigger is moved for releasing the locking action, acts on the operating mode selector and restores the operating mode selector from the start position into the operating position. 1. A hand-held power tool comprising:an internal combustion engine comprising:a throttle trigger adjustable between an idle position and a full throttle position;an operating mode selector adjustable between an operating position and a start position;an intake passage;at least one throttle element arranged in the intake passage, wherein the at least one throttle element, in the start position of the operating mode selector, is in a throttling position, wherein the at least one throttle element is secured in the throttling position by a locking action, wherein the locking action is released upon actuation of the throttle trigger from the idle position in the direction toward the full throttle position;a restoring element coupled permanently to the position of the throttle trigger, wherein the restoring element, when the throttle trigger is moved for releasing the locking action, acts on the operating mode selector and restores the operating mode selector from the start position into the operating position.2. The power tool according to claim 1 , wherein ...

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Номер записи: 94
01-10-2015 дата публикации

CHAIN FOR A WORK IMPLEMENT, METHOD FOR PRODUCING A STUD FOR A CHAIN AND METHOD FOR PRODUCING A DRIVING MEMBER FOR A CHAIN

Номер: US20150273729A1
Автор: Apfel Norbert, Buchholtz Jochen, Gerstenberger Oliver, Lux Thomas, Regnet Nina, SCHULZ Matthias
Принадлежит: ANDREAS STIHL AG & CO. KG

A chain for a work implement has lateral connecting members connected to central driving members via studs. The stud has two lateral portions spaced apart from one another by a collar. A driving member is mounted pivotably on the collar. At the collar the stud has a surface layer harder than the base material. For a high chain service life, the stud has a diffusion layer above a surface layer above the base material. To produce the stud, the stud is provided with a diffusion layer at least at the collar, and a surface region of the collar is hardened, such that a surface layer is formed between the diffusion layer and the base material of the stud. For a method for producing a driving member, the driving member is provided with a diffusion layer at least at a circumferential surface of a hole and the driving member is hardened. 1. A chain for a work implement , wherein the chain comprises:a plurality of connecting members,a plurality of driving members, anda plurality of studs,wherein the connecting members are connected in an articulated manner to the driving members by way of the studs, wherein the studs and the driving members comprise steel,wherein at least one stud comprises two lateral portions which are spaced apart from one another in the longitudinal direction of the stud and between which there is arranged a collar with an enlarged external diameter,wherein at least two of the connecting members have at least one hole, through which a stud projects, wherein the connecting members are arranged on the lateral portions of the stud and are connected to the stud fixedly in terms of rotation and fixedly in the direction of the longitudinal central axis of the stud,wherein a driving member is mounted pivotably on the collar of the stud through a hole in the driving member,wherein at the collar the stud has a surface layer which has a greater hardness than a hardness of a base material of the stud, wherein the stud has a diffusion layer at least at the collar, and ...

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Номер записи: 95
22-08-2019 дата публикации

Hand-Guided Power Tool with a Control Device

Номер: US20190255727A1
Автор: Günter Wolf, Holger Vollmer, Jan Kurzenberger, Marcel Förster, Ulrich Kapinsky
Принадлежит: Andreas Stihl AG and Co KG

A hand-guided power tool has an internal combustion engine that is arranged in a power tool housing and drives a tool member of the power tool. A fuel tank and at least one electric component are provided. A control device that is an electronic control unit is connected to the at least one electric component and controls the at least one electric component. The power tool has a top face which, when parking the power tool in a usual parking position on a flat horizontal support surface, is facing upwardly. The electronic control unit has a plug contact and a connecting plug is plugged into the plug contact. The connecting plug is connected by a connecting line to the at least one electric component. The connecting plug is arranged on a top side of the control device which is facing upwardly in the usual parking position of the power tool.

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Номер записи: 96
21-09-2017 дата публикации

Work Device

Номер: US20170266834A1
Автор: Benjamin FREY, Helmut Zimmermann, Klaus-Martin Uhl
Принадлежит: Andreas Stihl AG and Co KG

The invention relates to a work device with a guide rail ( 4 ) on which a chain ( 5 ) is driven in a circulating manner. The work device has a clamping device ( 15 ) for the chain ( 5 ). The clamping device ( 15 ) has a clamping element ( 16 ) which acts on en the guide rail ( 4 ) in the direction ( 19 ) of the longitudinal central axis ( 18 ) of the guide rail ( 4 ). The clamping device ( 15 ) has a rotatably mounted adjusting element ( 17 ) which is connected to the clamping element ( 16 ) via a threaded connection ( 20 ). A rotation of the adjusting element ( 17 ) about its rotational axis ( 21 ) causes a movement of the clamping element ( 16 ) in the direction ( 19 ) of the longitudinal central axis ( 18 ) of the guide rail ( 4 ). The outer circumference of the adjusting element ( 17 ) has a threaded portion ( 22 ) with at least one turn ( 23 ), said threaded portion being provided for engaging with at least one threaded portion ( 24 ) of the clamping element ( 16 ). The adjusting element ( 17 ) has an actuating contour ( 39 ) so that a user can rotate the adjusting element ( 17 ), said actuating contour comprising at least one depression. The largest spacing (b) between the threaded portion ( 22 ) of the adjusting element ( 17 ) and the rotational axis ( 21 ) is at least as large as the largest spacing (a) between the actuating contour ( 39 ) and the rotational axis ( 21 ).

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Номер записи: 97
21-09-2017 дата публикации

Electronic control unit for operating an electric motor having a braking resistor

Номер: US20170271952A1
Автор: Gernot Liebhard, Kay-Steffen Gurr, Lothar Lehmann, Rudolf Saemann
Принадлежит: Andreas Stihl AG and Co KG

An electronic control unit is configured to operate an electric motor from a rechargeable battery pack. The control unit has a circuit board with electronic components for driving the electric motor. Furthermore, an electrical braking circuit having a braking resistor and also a braking switch is provided. The receiving surface of the circuit board is spatially divided into a first surface region and a second surface region. The first surface region serves to receive electronic components; the second surface region serves to receive the braking resistor, wherein the braking resistor is configured as a conductor track which is formed on the circuit board.

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Номер записи: 98
21-09-2017 дата публикации

Electromechanical function unit for a battery-operated, handheld work apparatus

Номер: US20170273209A1
Автор: Gernot Liebhard, Joachim Kolb, Kay-Steffen Gurr, Matthias Mueller
Принадлежит: Andreas Stihl AG and Co KG

An electromechanical function unit is for a battery operated, handheld work apparatus that has an operating switch for putting the work apparatus into operation. The operating switch is to be actuated by an actuating element of the work apparatus. The operating switch is connected to a control unit for operating the work apparatus. The control unit includes a circuit board having electronic components, and has a first circuit board side, and a second circuit board side that faces away from the first circuit board side. In order to avoid wiring and to reduce the tolerance chain, provision is made to dispose the operating switch on the second circuit board side. The operating switch is supported statically via a support arrangement, independently of the circuit board. The support arrangement has no mechanical connection to the circuit board, and leads from the second circuit board side to the first circuit board side.

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Номер записи: 99
08-10-2015 дата публикации

Hand-held power tool with a clutch and method for producing a groove in the circumferential wall of a clutch drum of a hand-held power tool

Номер: US20150285315A1
Автор: Günter Wolf, Marcel Förster
Принадлежит: Andreas Stihl AG and Co KG

A hand-held power tool is provided with a drive motor and a clutch connected to the drive motor. The drive motor drives a tool member through the clutch. The clutch has a clutch drum with a circumferential wall provided with an end face. A follower member engages a groove in the circumferential wall of the clutch drum and a driven element is connected to the follower member to be driven by the follower member. The groove extends from the end face of the circumferential wall into the circumferential wall and has a groove bottom and two groove sides positioned opposite each other. The circumferential wall has a protrusion located at the groove bottom. The protrusion has a protrusion thickness measured at the groove bottom that amounts to at least approximately 110% of a wall thickness of the circumferential wall measured at the two groove sides.

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Номер записи: 100