B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
B60T 13/38 (2006.01) B60T 17/04 (2006.01) F16K 24/04 (2006.01) F16D 65/28 (2006.01)
Patent
CA 2568783
A brake actuator redirects pressurized air that compressed a parking brake spring to the other side of a piston upon release of the parking brake spring. The redirected air is clean air which removes contaminates and pushes them out a one-way check exhaust. A first embodiment of the brake actuator uses an external quick release valve to take exhaust air from a pressure chamber and direct it to the spring chamber. A second embodiment of the brake actuator uses the spring brake control valve to take exhaust air from the pressure chamber and direct it to the spring chamber. In each embodiment, the pressurized air pushes out the excess air past the one-way check exhaust, carrying all contaminates with it. The brake actuator can also advantageously be operated under water without the water entering the spring chamber.
Blake Cassels & Graydon Llp
Wabash National L.p.
LandOfFree
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