Positive neutral control for hydrostatic transmission

Details Positive neutral control for hydrostatic transmission Positive neutral control for hydrostatic transmission

F - Mech Eng,Light,Heat,Weapons

16

H

138/45.1

F16H 61/42 (2006.01)

Patent

CA 1132438

POSITIVE NEUTRAL CONTROL FOR HYDROSTATIC TRANSMISSION Abstract of the Disclosure A hydrostatic transmission includes a reversible, variable displacement pump having a swashplate actuator controlled by a pilot-operated displacement control valve. A manually operated displacement control lever is manipulated to opposite sides of a neutral position to effect command signals for causing pilot operation of the displacement control valve to control movement of the swashplate in accordance with the command. A neutral control valve is coupled to the displacement control lever and is operated thereby to a neutral position, wherein it connects the swashplate actuator to sump, when the lever is moved to its neutral position.

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