Spring chamber isolation system for a fluid-operated brake...

Details Spring chamber isolation system for a fluid-operated brake... Spring chamber isolation system for a fluid-operated brake...

F - Mech Eng,Light,Heat,Weapons

01

B

F01B 19/00 (2006.01) B60T 17/08 (2006.01)

Patent

CA 2138379

A spring chamber isolation system is provided to isolate the spring chamber of a spring brake actuator from its operating environment. The brake actuator (14) comprises a service brake housing (18) divided into first and second service chambers (26. 28) by a diaphragm or piston, and a spring brake housing (20) arranged in tandem with and attached to the service brake housing, also divided into a first and second spring chambers (62, 63) by a diaphragm (53) or piston. A hollow actuator rod (56) is attached to the diaphragm or piston in the spring brake housing and extends from the first spring chamber, through openings in the spring and service brake housings, into the first service brake chamber. The actuator rod is open at both ends, allowing air to flow from the first service chamber into the first spring chamber when the volume of the first spring chamber increases.

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