Fluid-operated brake actuator with internal check valve

Details Fluid-operated brake actuator with internal check valve Fluid-operated brake actuator with internal check valve

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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