Servo booster mechanism

Details Servo booster mechanism Servo booster mechanism

1984-03-19

1985-09-10

Maslousky, Paul E.

Motors: expansible chamber type

Constantly applied motive fluid with controlled venting

Fluid vented through working member

91376R, 91417R, F15B 1517

Patent

active

045398917

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 P.sub.s to present an operational chamber (46) with fluid at a pressure P.sub.x. A second restrictor (openings 74-76) creates a second pressure drop in fluid pressure P.sub.x supplied from the operational chamber (46) to present control chamber (88) with fluid at a pressure P.sub.h. The difference in pressures 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.

REFERENCES:
patent: 1585529 (1926-05-01), Bouing
patent: 3514072 (1970-05-01), Tutherly
patent: 3757640 (1973-09-01), Karol

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