Hydraulic control device

Details Hydraulic control device Hydraulic control device

F - Mech Eng,Light,Heat,Weapons

15

B

138/80, 138/79.1

F15B 21/00 (2006.01) F04B 49/025 (2006.01) F15B 1/26 (2006.01)

Patent

CA 1053121

ABSTRACT OF THE DISCLOSURE A hydraulic control device for use in a hydraulic system having a pump supplying fluid from a reservoir to a working circuit. The control device detects leaks in the working circuit by monitoring the level of hydraulic fluid in the reservoir. In the event of a drop in the level of hydraulic fluid beyond a predetermined low level, the control device automatically diverts the fluid output side of the pump to the fluid input side to prevent further loss of fluid in the working circuit and to safeguard against cavitation in the pump due to the low level of fluid in the reservoir. The control device also senses excessive pressure peaks in the working circuit and operates to relieve the excessive pressure peaks by automatically venting a portion of the fluid on the output side of the pump to the reservoir. I

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