Servo booster mechanism

Details Servo booster mechanism Servo booster mechanism

F - Mech Eng,Light,Heat,Weapons

15

B

138/56.12

F15B 9/08 (2006.01)

Patent

CA 1224380

ABSTRACT A servo booster mechanism (18) having a piston (48) responsive to movement of a plunger (84) by an input signal for controlling the rate of fluid flow past a seat (82) into a passage (80) for distribution to the surrounding environment. A first restrictor (75) creates a first pressure drop in a supply fluid pressure Ps to present an operational chamber (46) with fluid at a presure Px. A second restrictor (openings 74-76) creates a second pressure drop in fluid pressure Px supplied from the operational chamber (46) to present control chamber (88) with fluid at a pressure Ph. The difference in pressure combine to act on the piston (48) and plunger (84) to provide a constant force at stem (26), which provides a feedback to the input member (12), and provide a linkage (22) with a force to hold a position sensor (24) in a stationary position.

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