Brake control system with metering pump relief

Details Brake control system with metering pump relief Brake control system with metering pump relief

B - Operations, Transporting

65

G

188/4, 138/47

B65G 43/00 (2006.01) B66D 5/26 (2006.01) F16D 65/14 (2006.01)

Patent

CA 1183757

-11- Brake Control System With Metering Pump Relief Abstract This invention relates to a brake control system for controlling engagement and disengagement of a spring applied pressure released brake of a winch and includes an orifice and a relief valve connected in series to the outlet port of a metering pump to relieve pressure in the outlet port at a lower than normal pressure level when the fluid flow therethrough is below a predetermined flow rate. Relieving the pressure at the outlet port of the metering pump reduces the pressure differential between the inlet port and outlet port of the metering pump and thereby drastically reduces the internal leakage within the metering pump so that the metering pump is operative to pump fluid from the actuating chamber at the slow rotational speeds of the rotatable member.

427893

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