Variable displacement hydraulic control with override

Details Variable displacement hydraulic control with override Variable displacement hydraulic control with override

F - Mech Eng,Light,Heat,Weapons

15

B

341/97, 138/78.1

F15B 9/17 (2006.01) F16H 61/46 (2006.01)

Patent

CA 1178871

VARIABLE DISPLACEMENT HYDRAULIC CONTROL WITH OVERRIDE Abstract of the Disclosure In the preferred form, the invention disclosed herein provides a single servo control valve to modulate the flow of control fluid to a servo mechanism of a variable displacement pump wherein the single valve is provided with both a manual primary input and an electro-hydraulic secondary input which modulates the primary input. The servo valve is spring biased toward a neutral position with the manual input displacement command being applied to such servo valve through a resilient linkage. Also applied to the servo valve is a hydraulic signal which is electrically controlled to modify the displacement of the servo valve relative to the yieldably applied manual input.

410942

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