FLAP VALVE GEAR CAPABLE OF COPING WITH CHIP

摘要

A reverse-flow fluid control system utilizes a pair of rivet-shaped flappers mounted on a motor driven lever to apportion fluid between a pair of nozzles. Each flapper is slideably mounted upon the lever to allow the lever to move relative to and independently of the flapper should a chip become lodged between a flapper and a nozzle as the lever moves towards that nozzle.