Dual-speed setting underspeed system

Details Dual-speed setting underspeed system Dual-speed setting underspeed system

F - Mech Eng,Light,Heat,Weapons

04

B

138/69.13

F04B 49/00 (2006.01) F15B 11/17 (2006.01) F15B 15/18 (2006.01) F16H 61/46 (2006.01)

Patent

CA 1045509

DUAL-SPEED SETTING UNDERSPEED SYSTEM A B S T R A C T A hydraulic power system having a plurality of variable displacement pumps for supplying pressurized fluid for manipulation of an implement includes a control system operative to automatically adjust pump displacement to the output horsepower of a prime mover driving the pumps of the system. The control system includes underspeed valve means responsive to a deviation in the speed of the prime mover from a predetermined normal speed and a selectable second speed to transmit a fluid pressure signal to a servocontrol means for adJusting the displacement of the pumps. The control system includes a valve for selectively conditioning the control system to cause the underspeed valve to respond to a deviation of the selected engine speed and an indicator for indicating the conditioning of the control system.

263497

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