Brake actuator

Details Brake actuator Brake actuator

1975-05-27

1976-10-05

Maslousky, Paul E.

Motors: expansible chamber type

With motive fluid valve

Valved piston

91404, 91444, 91449, F15B 1108, F15B 1304

Patent

active

039837904

ABSTRACT:
A brake actuator for a vehicle having air brakes is disclosed in which air pressure is expelled through the actuator upon release of the brakes in order to purge the latter of contaminants. The actuator includes a housing in which a piston reciprocates. Fluid pressure is admitted to the chamber defined between one side of the piston and the corresponding end of the housing in order to urge the latter in a brake actuating direction. The piston includes a passage extending therethrough to connect the chambers defined between opposite sides of the piston and the corresponding ends of the housing, and a shuttle valve carried within the passage in order to close the passage upon brake application and open the passage to permit fluid communication between the chambers upon brake release. An articulated guide rod is pivotally mounted on the end wall of the housing and extends into the piston to guide the shuttle valve during operation of the actuator.

REFERENCES:
patent: 1965064 (1934-07-01), Zwayer
patent: 3236157 (1966-02-01), Lovell et al.
patent: 3361036 (1968-01-01), Harvey et al.
patent: 3789737 (1974-02-01), Burnett

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