Fluid-operated brake actuator with internal valve

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

1996-03-28

2000-11-21

Nguyen, Hoang

Expansible chamber devices

Plural flexible wall working members

92 63, 92 96, 91376R, 91509, F01B 1900

Patent

active

RE0369551

ABSTRACT:
A fluid-operated brake actuator having a hollow actuator rod between a spring chamber of a spring brake housing and a spring chamber of a service brake housing incorporates a valve within the actuator rod. The valve isolates the two spring chambers from each other in normal operation and releases a vacuum in the spring brake housing spring chamber when the spring brake is activated. A separate one-way check valve mounted in a well of the spring brake housing permits fluid to exhaust from the spring chamber to atmosphere and prevents contaminants in the atmosphere from entering the spring chamber.

REFERENCES:
patent: 2931616 (1960-04-01), White et al.
patent: 3101219 (1963-08-01), Herrera
patent: 3155012 (1964-11-01), Ayers
patent: 3659501 (1972-05-01), Beard
patent: 3696711 (1972-10-01), Berg et al.
patent: 3712178 (1973-01-01), Hensley
patent: 3730056 (1973-05-01), Swander, Jr.
patent: 4960036 (1990-10-01), Gummer et al.
patent: 5372059 (1994-12-01), Pierce et al.
Brochure Entitled "Neway Immediate Response Height Control Valve". The brochure was published by Lear Siegler Truck Products Corporation, 1992.

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