Pneumatically operated servo-booster

Details Pneumatically operated servo-booster Pneumatically operated servo-booster

1987-08-17

1989-03-21

Garrett, Robert E.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

91376R, F15B 910

Patent

active

048133388

ABSTRACT:
A pneumatically operated servo booster has a housing divided by a diaphragm assembly into front and rear chambers respectively. A hub movable with the partition carries a vacuum valve seat and a plunger slidable within the hub carries an atmospheric valve seat, the seats co-operating with a spring-urged poppet valve to control fluid flow to the chamber. A stack of Belleville washers normally transmits input force from an input rod, the washers yielding at a predetermined input force to allow a cup member to engage an abutment carried by the hub, causing the hub to move relative to the valve member and temporarily open the valve seat to cause a reduction in boost compensating for the excess input force.

REFERENCES:
patent: 3209657 (1965-10-01), Randol
patent: 3727405 (1973-04-01), Randol
patent: 3795426 (1974-03-01), Sisson

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