Kitchen ventilator damper actuator and control

Abstract From the Canadian patent

Abstract of Disclosure, 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 …