B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/72
B60T 8/32 (2006.01) B60T 8/36 (2006.01) B60T 13/66 (2006.01)
Patent
CA 1202053
ABSTRACT OF THE DISCLOSURE A microprocessor having input fluid brake control apparatus and output fluid brake application apparatus is pro- vided wherein the output fluid brake application apparatus comprises a digital signal characteristic of a desired fluid braking pressure. The brake application apparatus comprises an improved fluid pressure regulator having a fluid pressure cham- ber for developing and maintaining a regulated braking fluid pressure. The improved regulator has valves selectively oper- able to brake application, release, and lap positions for selectively governing regulated fluid pressure in a braking device and in the fluid pressure chamber. A digital linear actuator having an axially operable shaft responsive to the digital signal is provided to actuate the valves alternately to application and release positions, the actuator being secured to a piston subject to pressure in the fluid pressure chamber on one side thereof and subject to pressure of a metering spring on the other side thereof. The valves are governed by a spool that is linearly actuated by the actuator.
409290
Borden Ladner Gervais Llp
General Signal Corporation
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