B - Operations – Transporting – 60 – T
Patent
B - Operations, Transporting
60
T
303/46
B60T 15/18 (2006.01) B60T 11/34 (2006.01)
Patent
CA 1042487
BRAKE CONTROL VALVE DEVICE WITH MOVABLE CONTROL RESERVOIR CHARGING VALVE ABSTRACT OF THE DISCLOSURE A brake control valve device operated by a reduction in brake pipe pressure on one side of a movable abutment rela- tive to control reservoir pressure on the opposite side em- bodies in the abutment a control reservoir charging valve mechanism, a filter and a choke arranged in series. The valve mechanism comprises a spring-biased valve slidably mounted in a ported bushing carried by the abutment. Two spaced-apart stops carried on the abutment enable relative movement between the abutment and the valve whereby, in one position of the valve, fluid under pressure may flow from the brake pipe to the control reservoir to effect charging thereof via the ported bushing, a passageway in the valve and the choke, and, in a second position of this valve, this charging communica- tion is closed. One end of the valve abuts a member disposed therebetween and a second abutment biased in the direction of the first abutment by a strong spring. Therefore, upon a reduction of brake pipe pressure on the one side of the one abutment to effect a brake application, control reservoir pressure on the opposite side shifts this one diaphragm and the ported bush- ing relative to the valve until a seal member carried adjacent the one end of this valve is disposed below the ports in the bushing thereby closing communication between the brake pipe and the control reservoir.
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