Hydrostatic transmission

Details Hydrostatic transmission Hydrostatic transmission

F - Mech Eng,Light,Heat,Weapons

15

B

138/41.15

F15B 15/18 (2006.01) F16H 61/46 (2006.01)

Patent

CA 1049889

HYDROSTATIC TRANSMISSION Abstract of the Disclosure The hydrostatic transmission includes a main pump having a plurality of reciprocating pistons projecting into and biased towards a drive chamber and has both its inlet and its drive chamber connected to a substantially constant pressure charge circuit. Displacement of the pump is controlled by controlling the fluid flowing from the charge circuit to the inlet. The pump outlet is connected to the drive chamber through a com- bined safety and inching valve which normally blocks fluid flow therebetween but which is responsive to excess pressure at the pump outlet to open and increase the pressure in the drive chamber. The valve is also manually operable through a pedal on the vehicle which can be used to destroke the pump in emergency situations or to provide inching control.

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