Patent ID: 8801392
Filing Date: 2014-08-12
Classification: F04B,F04D,F16K,Y10T

Abstract:
1. A controlling mechanism for an inflatable object having an air pump selectively operable to deflate and inflate the inflatable object, the controlling mechanism comprising: a valve controlling assembly comprising a valve shaft and a valve formed on a distal end thereof, the valve shaft movable between a first position in which the valve is closed so as to block fluid communication between the air pump and the inflatable object and a second position in which the valve is open so as to allow fluid communication between the air pump and the inflatable object; a pressure controlling assembly in fluid communication with the inflatable object and comprising a controlling shaft driven to move by air pressure in the inflatable object; and a linkage assembly arranged to lock the valve shaft into position when the valve shaft is driven into the second position; wherein the pressure controlling assembly is configured such that when air pressure inside the inflatable object reaches a predetermined high pressure and the valve shaft is locked into position by the linkage assembly, movement of the controlling shaft drives the linkage assembly to release the valve shaft.