B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/83
B60T 13/22 (2006.01) B60T 13/16 (2006.01) B60T 13/18 (2006.01) B60T 15/04 (2006.01)
Patent
CA 1326255
ABSTRACT OF THE DISCLOSURE A hydraulic control valve for controlling the parking brakes of a vehicle hydraulic braking system having mechanically applied parking brakes which are released by hydraulic pressure includes a housing having a mechanically actuated control valve and a diverter assembly. When the vehicle is parked, the parking brakes are vented to reservoir and fluid from the vehicle hydraulic pump is communicated directly from the inlet of the valve to the return or drain port of the valve. When the brakes are released, communication between the spring brakes and reservoir pressure is cut off, and fluid communicated into the inlet is diverted to the diverter assembly, which builds pressure to a predetermined level which is communicated to the vehicle parking brakes to release the latter. When the predetermined pressure level is attained, the diverter assembly automatically opens to permit fluid to bypass the diverter assembly back to the return or drain port.
611101
Johnson Duane Richard
Vander Molen Gary Lee
Bendix Commercial Vehicle Systems Llc
Macrae & Co.
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