Abstract: A piston anti-knock back assembly in a disc brake assembly having a brake actuator comprising a piston slidably mounted within a cylinder bore and operable to urge a fricton surface into contact with a rotary disc surface upon supply of hydraulic fluid under pressure to said cylinder bore, comprises an expanded resilient split ring in frictional contact with a main portion of the cylinder bore and loosely axially located in an annular piston groove adjacent a conical head of said piston.
Type:
Grant
Filed:
July 8, 1981
Date of Patent:
April 26, 1983
Assignee:
General Motors Corporation
Inventors:
Gabriel Gregoire, Vincent Robles, Pedro Alvarez
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