Stoves and furnaces – Stove hoods
Patent
1976-04-08
1978-01-03
Capossela, Ronald C.
Stoves and furnaces
Stove hoods
169 65, 251 62, 55DIG36, F23L 1300
Patent
active
040660648
ABSTRACT:
This invention relates to a kitchen ventilating system, where a kitchen hood communicates through an exhaust duct to the exterior atmosphere, where a fan in the duct operates for powered venting of the kitchen, and where a damper can be closed to separate the kitchen from the exhaust duct. This invention teaches means for shifting the damper between the closed position and the open position, which means is a fluid power actuator in the form of a power cylinder. The power cylinder is operated by water, typically from the same source as the regular kitchen water, and control valve means utilized between this source of water under pressure and the cylinder controls the shifting of the damper. The preferred system provides that the valve means shifts by spring pressure to the position corresponding to where the damper is closed and is electrically shifted to open the damper, so that should a power failure occur the damper will automatically be closed. Also, there is a pressure tank that retains sufficient water pressure to close the damper, even though the source of water may actually have inadequate or total loss of pressure.
REFERENCES:
patent: 2311374 (1943-02-01), Farmer et al.
patent: 2648346 (1953-08-01), Deardorff et al.
patent: 3055285 (1962-09-01), Gaylord
patent: 3207058 (1965-09-01), Gaylord
patent: 3785124 (1974-01-01), Gaylord
patent: 3802493 (1974-04-01), Goettl
patent: 3805685 (1974-04-01), Carns
patent: 3831643 (1974-08-01), Lau
Capossela Ronald C.
Lind Charles F.
McGraw-Edison Company
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