Pneumatically actuated parking brake

Details Pneumatically actuated parking brake Pneumatically actuated parking brake

2006-02-07

2006-02-07

Kramer, Devon C. (Department: 3683)

Brakes

Operators

Spring

C188S265000, C188S072700

Reexamination Certificate

active

06994191

ABSTRACT:
A vehicle parking brake system pneumatically actuates an air cylinder to mechanically lock a wheel brake in an applied position in response to a parking demand request. The air cylinder includes an extendable shaft that supports a lock member. When a parking demand request is initiated by moving a hand control, an air chamber is pressurized with air from a parking reservoir via a valve assembly to apply the wheel brake. Air pressure is released from the air cylinder and the lock member is moved into engagement with a brake component to lock the wheel brake in the applied condition. The wheel brake remains locked even if pressure is released from the air chamber. When a release command is initiated, the air cylinder is pressurized and the lock member is moved out of engagement with the brake component.

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patent: 4746171 (1988-05-01), Engle
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patent: 5558410 (1996-09-01), Kanjo et al.
patent: 5558411 (1996-09-01), Kanjo et al.
patent: 6305511 (2001-10-01), McCann et al.
patent: 6491352 (2002-12-01), Engle
patent: 6578679 (2003-06-01), Hill et al.
patent: 0 207 275 (1987-01-01), None
patent: 0 891 908 (1999-01-01), None
patent: WO 99/48738 (1999-09-01), None
patent: WO 01/66376 (2001-09-01), None
European Search Report, Mar. 15, 2005.

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