Brakes – Operators – Fluid pressure
Patent
1990-04-12
1991-08-13
Butler, Douglas C.
Brakes
Operators
Fluid pressure
92 24, 188 59, 188170, 188265, B60T 1310, B60T 1304, B61H 1322, F16D 6532
Patent
active
050388967
ABSTRACT:
In a brake cylinder (1) for vehicle brake systems a service and a parking brake are provided within a common housing (25). The parking brake (41) acts on a brake actuating member (37) of the brake cylinder (1) against spring force via a parking brake piston (57) which can be loaded preferably by a pressure medium, and can be locked in the parking brake position by a locking mechanism (43) that acts mechanically, i.e., pressure independently, and that is applied automatically subject to spring force when the parking brake is actuated. The locking mechanism (43) is released preferably by loading a locking piston (59) with a pressure medium in such a manner that the parking brake piston can be returned automatically subject to spring force into its release position and is mechanically maintained in this position.
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patent: 4592451 (1986-06-01), Persson
patent: 4795005 (1989-01-01), Wirth
Butler Douglas C.
Knorr-Bremse AG
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