Rooftop Exhaust System with Automatic Motor Lockout

A rooftop exhaust fan incorporates a mechanical motor lockout that prevents a fan motor from being energized when the exhaust fan assumes an open position for cleaning, maintenance or inspection.

Commercial Kitchen Installation with Double Wall Grease Duct

A grease duct assembly is employed in a commercial kitchen. The grease duct assembly includes multiple sections that are connected together and sealed. Each section includes a double wall construction that forms a central conduit and an annular space that extends between an inner wall and an outer wall. Shredded insulation is directed into the annular space and compressed therein.

A system for directing and controlling two separate streams of air to a kitchen

A method of directing two streams of air, a conditioned stream and an unconditioned stream, into a kitchen having an exhaust hood through which air is exhausted from the kitchen, the method comprising: a. directing the conditioned air stream into the kitchen and out an outlet in a vicinity of the exhaust hood; b. directing the unconditioned air stream into the kitchen and out an outlet positioned generally between the exhaust hood and the outlet for the conditioned air stream; c. controlling the velocity of one or both air streams such that a velocity of the conditioned air stream equals or exceeds a velocity of the unconditioned air stream; and d. wherein controlling the velocity of the one or more air streams includes varying a speed of a fan utilized to move either the unconditioned or conditioned air streams or adjusting a damper in a conduit through which one of the air streams passes.

A system for directing and controlling two separate streams of air to a kitchen

A system for directing two separate streams of air to a commercial or industrial kitchen environment. The system includes a dual airflow plenum that is normally disposed adjacent a kitchen exhaust hood. Typically one stream of air is a tempered, that is heated or cooled, and is directed through the dual airflow plenum to where it is exhausted at an area or point adjacent the exhaust hood. A second untempered, that is ambient air, air stream is directed through the same dual air flow plenum and is exhausted into an area adjacent the exhaust hood. Preferably the plenum is positioned with respect to the exhaust hood such that the outlet for the untempered air is disposed generally between the exhaust hood and the outlet for the tempered air. Moreover, the relative velocity of the two air streams is maintained or controlled such that the velocity of the tempered air stream is equal to or greater than the velocity of the untempered air stream.

Kitchen exhaust hood assembly having components secured together by threaded studs

A kitchen exhaust hood assembly comprises a front subassembly and a rear subassembly connected together. The connected subassemblies including a top portion and opposed side surfaces. A pair of side panels is connected to opposed sides of the front and rear subassemblies. A series of threaded studs welded to either the front or rear subassemblies or to the side panels project into and through openings formed through either the front or rear subassemblies or the side panels such that the side panels are secured to the front and rear subassemblies secured to the threaded studs.

Rooftop exhaust system with automatic motor lockout and method of locking out an electric motor of a rooftop exhaust system

Rooftop exhaust system with automatic motor lockout

A rooftop exhaust system for exhausting air from a building comprising a motor and fan mounted in a housing and a support disposed underneath the housing. The housing being moveable between a closed position where exhaust air moves upwardly through the support and the housing and an open position where the housing is tilted with respect to the support and access can be gained to the fan and motor. A motor disconnect switch configured to prevent the motor from being energized when the switch is in an off position. A stationary motor lockout mounted adjacent to and aligned with the disconnect switch and configured to engage and move the stitch to the off position in response to the housing pivoting to the open position, and lie in the path of the switch when the housing assumes the open position, preventing the switch from moving to the on position.

Rooftop exhaust system with automatic motor lockout

ROOFTOP EXHAUST SYSTEM WITH AUTOMATIC MOTOR LOCKOUT ABSTRACT A rooftop exhaust fan 10 incorporates a mechanical motor lockout that prevents a fan motor 14 from being energized when the exhaust fan assumes an open position for cleaning, maintenance or inspection. 1/2 10 12 0 0 a a a a a 46A 46 10 44 40 uOFF 30 42 0 180 FIG. 1

Rooftop exhaust system with automatic motor lockout

A rooftop exhaust system for exhausting air from a building comprising a motor and fan mounted in a housing and a support disposed underneath the housing. The housing being moveable between a closed position where exhaust air moves upwardly through the support and the housing and an open position where the housing is tilted with respect to the support and access can be gained to the fan and motor. A motor disconnect switch configured to prevent the motor from being energized when the switch is in an off position. A stationary motor lockout mounted adjacent to and aligned with the disconnect switch and configured to engage and move the stitch to the off position in response to the housing pivoting to the open position, and lie in the path of the switch when the housing assumes the open position, preventing the switch from moving to the on position.

Rooftop exhaust system with automatic motor lockout

ROOFTOP EXHAUST SYSTEM WITH AUTOMATIC MOTOR LOCKOUT ABSTRACT A rooftop exhaust fan 10 incorporates a mechanical motor lockout that prevents a fan motor 14 from being energized when the exhaust fan assumes an open position for cleaning, maintenance or inspection. 1/2 10 12 0 0 a a a a a 46A 46 10 44 40 uOFF 30 42 0 180 FIG. 1

Rooftop exhaust system with automatic motor lockout and method of locking out an electric motor of a rooftop exhaust system

A rooftop exhaust fan incorporates a mechanical motor lockout that prevents a fan motor from being energized when the exhaust fan assumes an open position for cleaning, maintenance or inspection.