Title: Parking brake device

Abstract: A combined fluid pressure operable running and parking vehicle brake device including an application piston responsive to fluid pressure for exerting a brake-applying force on a vehicle wheel through a brake shoe for effecting either a service or emergency application, a locking piston responsive to fluid pressure independently of the application piston, for locking the brake device in an application disposition when the vehicle is parked, and compressible springs placed under compression by actuation of the application piston for storing a compressive force available for providing the brake-applying force in the event of failure of fluid pressure when the vehicle is parked.

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Inventors: Shirey, Frank W. (N. Huntingdon, PA, US)

Application Number: 932591
Filing Date: 1978-08-10
Publication_date: 1980-08-05
Assignee: Westinghouse Air Brake Company (Wilmerding, PA)
Primary Class(es): 188/265 303/89
Other Classes:
US Patent Ref:

3035666	May, 1962	Beeskow	188/217.
3228729	Jan, 1966	Schubert	303/89.
3410610	Nov, 1968	Cumming	303/89.

Other Refs:
Primary Examiner: Reger, Duane A.
Assistant Examiner:
Attorney: Visk; R. S., McIntire, Jr.; R. W.