Control system for self-propelled line striper

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatable to steer a wheel, and a speed bar pivotable to control the propulsion system.

PISTON ROD HAVING CAP RECESS

A piston rod for pumping paint includes an elongated cylindrical stem and a piston rod cap connected to the cylindrical stem. The cylindrical stem is formed from metal and has an outer diameter that is uniform along most or all of a length of the cylindrical stem. The piston rod cap is cylindrical and formed from metal. The piston rod cap includes an annular top portion that has an outer diameter that is larger than the outer diameter of the cylindrical stem, an annular bottom portion that has an outer diameter that is larger than the outer diameter of the cylindrical stem, and an exterior recess located between the annular top and bottom portions. The recess has an outer diameter that is smaller than the outer diameters of the annular top and bottom portions. 1. A piston rod for pumping paint , the piston rod comprising:an elongated cylindrical stem, the cylindrical stem being formed from metal and having an outer diameter that is uniform along most or all of a length of the cylindrical stem; and an annular top portion having an outer diameter that is larger than the outer diameter of the cylindrical stem;', 'an annular bottom portion having an outer diameter that is larger than the outer diameter of the cylindrical stem; and', 'an exterior recess located between the annular top and bottom portions, the recess having an outer diameter that is smaller than the outer diameters of the annular top and bottom portions., 'a piston rod cap connected to the cylindrical stem, the piston rod cap being cylindrical and formed from metal, the piston rod cap comprising2. The piston rod of claim 1 , wherein the outer diameters of the annular top and bottom portions are equal.3. The piston rod of claim 1 , wherein the recess is a groove that extends entirely around a circumference of the piston rod cap.4. The piston rod of claim 1 , wherein a bottom of the cylindrical stem is configured to contact paint and pump the paint by reciprocation of the cylindrical stem.5. The piston rod ...

Paint sprayer

Paint sprayer

Paint sprayer

FLUID PUMP LEAKAGE DIVERSION

A piston rod assembly includes a piston rod having a first end configured to contact fluid, a packing retainer through which the piston rod extends, and one or more packing rings. The packing retainer includes one or more leakage ports forming passageways between an inner surface and an outer surface of the packing retainer. The one or more packing rings surround the piston rod, are adjacent the inner surface of the packing retainer, and are positioned between the one or more leakage ports and a bottom end of the packing retainer. The one or more leakage ports are positioned so that fluid that leaks past the one or more packing rings will flow through the one or more leakage ports. 1. A piston rod assembly comprising:a piston rod having a first end configured to contact fluid;a packing retainer though which the piston rod extends, the packing retainer including one or more leakage ports forming passageways between an inner surface and an outer surface of the packing retainer; andone or more packing rings that surround the piston rod, are adjacent the inner surface of the packing retainer, and are positioned between the one or more leakage ports and a bottom end of the packing retainer;wherein the one or more leakage ports are positioned so that fluid that leaks past the one or more packing rings will flow through the one or more leakage ports.2. The piston rod assembly of claim 1 , wherein the packing retainer further comprises a circumferential channel formed in the outer surface of the packing retainer and positioned to be in fluid communication with the one or more leakage ports.3. The piston rod assembly of claim 1 , wherein the piston rod further comprises a second end configured to contact a drive mechanism.4. The piston rod assembly of claim 1 , wherein the one or more packing rings are V-shaped.5. The piston rod assembly of and further comprising a paint permeable ring adjacent the one or more ports at the inner surface of the packing retainer.6. The piston ...

CONTROL SYSTEM FOR SELF-PROPELLED LINE STRIPER

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatatable to steer a wheel, and a speed bar pivotable to control the propulsion system. 1. A self-propelled paint system comprising:a chassis;a first wheel mounted to the chassis;a second wheel mounted to the chassis; a hydraulic fluid; and', 'a hydraulic motor driven by the hydraulic fluid and connected to the first wheel;, 'a hydraulic propulsion system mounted to the chassis, the hydraulic propulsion system comprising a paint pump powered by the hydraulic fluid; and', 'sprayers fluidly coupled to the paint pump; and, 'a paint system mounted to the chassis, the paint system comprising a steering lever rotatable about a first axis to move the second wheel; and', 'a control lever mounted to the steering lever to control flow of the hydraulic fluid to the hydraulic motor., 'a steering system comprising2. The self-propelled paint system of wherein: a carriage having a swivel post connected to the chassis; and', 'a tire mounted to the carriage; and, 'the second wheel comprises 'a pair of linkages connecting the steering lever to the carriage.', 'the steering system further comprises3. The self-propelled paint system of wherein the steering system further comprises:a caliper mounted to the swivel post;a centering post extending from the carriage;a stop post connected to the chassis;a caliper mounted to the chassis and having arms surrounding the centering post and the stop post; anda spring coupled to the arms of the caliper to position the carriage in a preferred orientation.4. The self-propelled paint system of wherein:the stop post is adjustably positioned on the chassis.5. The self-propelled paint system of wherein ...

CONTROL SYSTEM FOR SELF-PROPELLED LINE STRIPER

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatatable to steer a wheel, and a speed bar pivotable to control the propulsion system. 1. A self-propelled cart comprising:a chassis;a drive wheel coupled to an aft end the chassis;a swivel wheel mounted to a forward end of the chassis at a swivel; a hydraulic fluid;', 'a hydraulic pump for pressurizing the hydraulic fluid;', 'a hydraulic motor driven by the hydraulic fluid and connected to the drive wheel; and', 'a valve for controlling flow of hydraulic fluid from the hydraulic pump to the hydraulic motor; and, 'a hydraulic propulsion system mounted to the chassis, the hydrostatic propulsion system comprising a handle rotatable about a first axis;', 'a cable extending from the handle to the swivel wheel;', 'a control lever coupled to the handle and rotatable about a second axis; and', 'a cable extending from the control lever to the valve., 'a steering system comprising2. The self-propelled cart of claim 1 , and further comprising:a spring-biased lever coupled to the chassis to apply rotational bias to the swivel wheel; andan alignment post coupled to the chassis to arrest movement of the spring-biased lever.3. The self-propelled cart of claim 1 , wherein: a carriage having a swivel post connected to the chassis; and', 'a tire mounted to the carriage; and, 'the swivel wheel comprises 'a pair of linkages connecting the handle to the carriage.', 'the steering system further comprises4. The self-propelled cart of claim 3 , wherein the steering system further comprises:a caliper mounted to the swivel post;a centering post extending from the carriage;a stop post connected to the chassis;a caliper mounted to the chassis ...

BATTERY POWERED FLUID SPRAYER

A battery powered fluid sprayer includes a battery mounted to a vertically extending wall of the fluid sprayer. The battery powers an electric motor to power a pump to pump fluid to a spray gun for spraying. The battery is disposed within a battery chamber enclosed by a door. The battery is suspended above a base of the battery chamber to isolate battery from any fluid that may enter the chamber. 1. A fluid sprayer comprising:an electric motor;a battery supported by a drive housing and electrically connected to the electric motor to provide power to the electric motor, wherein the drive housing is supported by a frame of the fluid sprayer; anda pump operatively connected to the electric motor to be driven by the electric motor;wherein the battery is mounted in a battery compartment at least partially defined by the drive housing.2. The fluid sprayer of claim 1 , further comprising:a reservoir supported by the frame of the fluid sprayer, wherein the pump is configured to pump fluid from a reservoir.3. The fluid sprayer of claim 2 , wherein the electric motor is disposed between the battery and the reservoir.4. The fluid sprayer of claim 1 , further comprising:a door connected to the drive frame and configured to enclose the battery compartment.5. The fluid sprayer of claim 4 , wherein the door is hinged to move between an open state claim 4 , during which the battery is exposed claim 4 , and a closed state claim 4 , during which the battery is fully enclosed within the battery compartment.6. The fluid sprayer of claim 5 , wherein the door includes a seal groove extending laterally and disposed proximate a hinge connecting the door to the drive housing claim 5 , and wherein a seal is disposed in the seal groove claim 5 , the seal configured to interface with the drive housing with the door in the closed state.7. The fluid sprayer of claim 4 , wherein:the door includes a first lateral side and a second lateral side;the first lateral side overhangs the drive housing; ...

CONTROL SYSTEM FOR SLEF-PROPELLED LINE STRIPER

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatable to steer a wheel, and a speed bar pivotable to control the propulsion system. 1. A line striping system comprising:a chassis;wheels mounted under the chassis;a spray system mounted on the chassis;a propulsion system mounted on the chassis to drive a wheel; and a handlebar rotatable to steer a wheel; and', 'a speed bar pivotable to control the propulsion system., 'a steering system coupled to the chassis, the steering system comprising2. The line striping system of wherein the spray system and the propulsion system are both powered by a single engine.3. The line striping system of wherein the propulsion system comprises a hydrostatic system.4. The line striping system of wherein:a first wheel is located toward a forward end of the chassis and is powered by the propulsion system; anda second wheel is located toward an aft end of the chassis and is rotated by the steering system.5. The line striping system of wherein:a first wheel is located toward an aft end of the chassis and is powered by the propulsion system; anda second wheel is located toward a forward end of the chassis and is rotated by the steering system.6. The line striping system of wherein pivoting of the speed bar in a first direction causes forward propulsion and pivoting of the speed bar in a second direction causes reverse propulsion.7. The line striping system of wherein rotation of the handlebar in a first direction causes leftward steering and rotation of the handlebar in a second direction causes rightward steering.8. The line striping system of wherein the steering system further comprises:a cable system connecting the handlebar and the ...

Spray gun for spraying paints and other coatings

A spray gun includes a gun body and a handle removably connected to the gun body. A filter is disposed in the handle for filtering particulate from the spray fluid. A trigger guard is connected to the handle and gun body and includes a contour on a lower portion of the trigger guard for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard can be disconnected from the gun body and rotated relative to the handle. The trigger guard can contact a portion of the handle and exert torque on the handle to connect the handle to and disconnect the handle from the gun body. The portion of the handle at least partially covers a fitting connecting to the handle to provide spray fluid to the spray gun.

CHECK VALVE WITH NONLINEAR FORCE LOAD FOR HVLP SPRAYING

A high-pressure low-volume spray system includes a hose disposed between a compressor and a spray gun. The hose acts as an accumulator when the spray gun is deactivated. A check valve is disposed in a fitting connecting the hose to the compressor. The check valve includes a spring that applies a nonlinear force to a downstream end of a valve member, such that the valve member tips open in response to the pressure differential, providing a variable flowpath opening through the check valve. 1. A high-volume low-pressure (HVLP) spray system for spraying a fluid , the spray system comprising:an air control unit configured to generate a flow of pressurized air;a spray gun configured to spray the fluid with the flow of pressurized air;a hose extending from the air control unit and configured to provide the flow of pressurized air from the air control unit to the spray gun; and a seat;', 'a valve member movable between a closed position in which the valve member is engaged with a seat and a modulated position in which the valve member is tipped partially off of the seat while a portion of the valve member is still engaged with the seat; and', 'a spring that pushes the valve member into the closed position, the spring configured to be overcome by the flow of the pressurized air such that the flow of the pressurized air moves the valve member to the modulated position., 'a check valve including2. The HVLP spray system of claim 1 , further comprising:a fitting attached to the air control unit; a cage disposed within the housing; and', 'the seat disposed at an upstream end of the cage;, 'wherein the check valve is disposed within the fitting and has a longitudinal axis, the check valve further comprisingwherein the spring disposed within the cage between a downstream end of the cage and the seat; andwherein the valve member is disposed within the cage between the spring and the seat, the downstream face of the valve member facing the spring and an upstream face of the valve ...

Fluid pump leakage diversion

A piston rod assembly includes a piston rod having a first end configured to contact fluid, a packing retainer through which the piston rod extends, and one or more packing rings. The packing retainer includes one or more leakage ports forming passageways between an inner surface and an outer surface of the packing retainer. The one or more packing rings surround the piston rod, are adjacent the inner surface of the packing retainer, and are positioned between the one or more leakage ports and a bottom end of the packing retainer. The one or more leakage ports are positioned so that fluid that leaks past the one or more packing rings will flow through the one or more leakage ports.

Control system for self-propelled line striper

A line striping system comprises a chassis, wheels, a spray system, a propulsion system and a steering system. The wheels are mounted under the chassis. The spray system is mounted on the chassis. The propulsion system is mounted on the chassis to drive a wheel. The steering system is coupled to the chassis. The steering system comprises a handlebar rotatatable to steer a wheel, and a speed bar pivotable to control the propulsion system.

Control system for self-propelled line striper

Fluid pump leakage diversion

FLUID PUMP LEAKAGE DIVERSION ABSTRACT A piston rod assembly includes a piston rod having a first end configured to contact fluid, a packing retainer through which the piston rod extends, and one or more packing rings. The packing retainer includes one or more leakage ports forming passageways between an inner surface and an outer surface of the packing retainer. The one or more packing rings surround the piston rod, are adjacent the inner surface of the packing retainer, and are positioned between the one or more leakage ports and a bottom end of the packing retainer. The one or more leakage ports are positioned so that fluid that leaks past the one or more packing rings will flow through the one or more leakage ports. 1/6 10 16 12 18 24 20 22-- Fig. 1

Paint sprayer

Fluid pump leakage diversion

Spray gun for spraying paints and other coatings

A spray gun (10) includes a gun body (12) and a handle (16) removably connected to the gun body (12). A filter (32) is disposed in the handle (16) for filtering particulate from the spray fluid. A trigger guard (90) is connected to the handle (16) and gun body (12) and includes a contour on a lower portion of the trigger guard (90) for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard (90) can be disconnected from the gun body (12) and rotated relative to the handle (16). The trigger guard (90) can contact a portion of the handle (16) and exert torque on the handle (16) to connect the handle (16) to and disconnect the handle (16) from the gun body (12). The portion of the handle (16) at least partially covers a fitting (22) connecting to the handle (16) to provide spray fluid to the spray gun (10).

Spray gun for spraying paints and other coatings

SPRAY GUN FOR SPRAYING PAINTS AND OTHER COATINGS ABSTRACT A spray gun includes a gun body and a handle removably connected to the gun body. A filter is disposed in the handle for filtering particulate from the spray fluid. A trigger guard is connected to the handle and gun body and includes a contour on a lower portion of the trigger guard for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard can be disconnected from the gun body and rotated relative to the handle. The trigger guard can contact a portion of the handle and exert torque on the handle to connect the handle to and disconnect the handle from the gun body. The portion of the handle at least partially covers a fitting connecting to the handle to provide spray fluid to the spray gun.

Spray gun for spraying paints and other coatings

A spray gun includes a gun body and a handle removably connected to the gun body. A filter is disposed in the handle for filtering particulate from the spray fluid. A trigger guard is connected to the handle and gun body and includes a contour on a lower portion of the trigger guard for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard can be disconnected from the gun body and rotated relative to the handle. The trigger guard can contact a portion of the handle and exert torque on the handle to connect the handle to and disconnect the handle from the gun body. The portion of the handle at least partially covers a fitting connecting to the handle to provide spray fluid to the spray gun.

Battery powered fluid sprayer

A battery powered fluid sprayer includes a battery mounted to a vertically extending wall of the fluid sprayer. The battery powers an electric motor to power a pump to pump fluid to a spray gun for spraying. The battery is disposed within a battery chamber enclosed by a door. The battery is suspended above a base of the battery chamber to isolate battery from any fluid that may enter the chamber.

Fluid sprayer with covered battery

A battery powered fluid sprayer includes a shelter that the battery is mounted in to provide power to the electric components of the sprayer. The shelter protects the battery from falling fluid droplets. The shelter extends above the battery and projects outward laterally and longitudinally to protect the battery. The battery can move vertically downward to dismount from the fluid sprayer.

Battery powered fluid sprayer

A battery powered fluid sprayer includes a battery mounted to a vertically extending wall of the fluid sprayer. The battery powers an electric motor to power a pump to pump fluid to a spray gun for spraying. The battery is disposed within a battery chamber enclosed by a door. The battery is suspended above a base of the battery chamber to isolate battery from any fluid that may enter the chamber.

Battery powered fluid sprayer

A battery powered fluid sprayer (12) includes a battery (68) mounted to a vertically extending wall (92) of the fluid sprayer (12). The battery (68) powers an electric motor (30) to power a pump (28) to pump fluid to a spray gun (16) for spraying. The battery is disposed within a battery chamber (70) enclosed by a door (24). The battery (68) is suspended above a base (64) of the battery chamber (70) to isolate battery (68) from any fluid that may enter the chamber (70).

Battery powered fluid sprayer

A fluid sprayer includes a battery supported by a stand of the sprayer and that is configured to provide electric power to a motor of the sprayer to cause pumping by a pump of the sprayer. The battery is mounted vertically below the sprayer body. The battery is bracketed by vertical portions of the stand.

Airless paint sprayer

Fluid sprayer with covered battery

A battery powered fluid sprayer (10) includes a shelter (18) that the battery (12) is mounted in to provide power to the electric components of the sprayer (10). The shelter (18) protects the battery (12) from falling fluid droplets. The shelter (18) extends above the battery (12) and projects outward laterally and longitudinally to protect the battery (12). The battery (12) can move vertically downward to dismount from the fluid sprayer (10).

Spray gun for spraying paints and other coatings

A spray gun includes a gun body and a handle removably connected to the gun body. A filter is disposed in the handle for filtering particulate from the spray fluid. A trigger guard is connected to the handle and gun body and includes a contour on a lower portion of the trigger guard for receiving one or more fingers of the user that are not interfacing with and contacting the trigger. The trigger guard can be disconnected from the gun body and rotated relative to the handle. The trigger guard can contact a portion of the handle and exert torque on the handle to connect the handle to and disconnect the handle from the gun body. The portion of the handle at least partially covers a fitting connecting to the handle to provide spray fluid to the spray gun.

Fluid sprayer with covered battery

A battery powered fluid sprayer includes a shelter that the battery is mounted in to provide power to the electric components of the sprayer. The shelter protects the battery from falling fluid droplets. The shelter extends above the battery and projects outward laterally and longitudinally to protect the battery. The battery can move vertically downward to dismount from the fluid sprayer.

Piston rod having cap recess

Mobile sprayer

A mobile sprayer is configured to apply swaths of fluid to target surfaces to coat the target surfaces with the fluid. A controller of the mobile sprayer controls movement of the mobile sprayer and spraying from a spray module of the mobile sprayer. A frame of the mobile sprayer is movably supported on a ground surface by one or more displacers. The spray module is configured to displace vertically relative to a base of the frame to apply vertical swaths of the fluid on the target surface.

Fluid pump leakage diversion

FLUID PUMP LEAKAGE DIVERSION ABSTRACT A piston rod assembly includes: a piston rod having a first end configured to contact fluid and a second end opposite the first end; a packing retainer though which the piston rod extends, the packing retainer including one or more leakage ports forming passageways between an inner surface and an outer surface of the packing retainer; one or more packing rings that surround the piston rod, are adjacent the inner surface of the packing retainer, and are positioned between the one or more leakage ports and the first end of the piston rod; and an annular wiper seal adjacent the inner surface of the packing retainer and positioned between the one or more leakage ports and the second end of the piston rod.