Expansible chamber devices – Plural flexible wall working members
Patent
1994-03-15
1995-10-24
Look, Edward K.
Expansible chamber devices
Plural flexible wall working members
92 98R, 92181P, 91376R, 137517, F01B 1900, F15B 910
Patent
active
054600766
ABSTRACT:
A fluid-operated brake actuator having a check valve in the spring chamber to equalize the pressure on opposite sides of an operating movable diaphragm. The brake actuator comprises a service brake housing divided into first and second service chambers by a diaphragm or piston, and a spring brake housing arranged in tandem with and attached to the service brake housing, also divided into a first and second spring chambers by a diaphragm or piston. The check valve connecting the first and second spring chambers blocks flow between the first and second chambers when the second spring brake chamber is pressurized and opens up flow between the two chambers when the second spring chamber is depressurized.
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Pierce Wiliam C.
Smith John P.
Stojic Steven
Look Edward K.
NAI Anchorlok Inc.
Nguyen Hoang
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