Hydrostatic continuously variable transmission

Details Hydrostatic continuously variable transmission Hydrostatic continuously variable transmission

2011-03-29

2011-03-29

Leslie, Michael (Department: 3745)

Power plants

Pressure fluid source and motor

Input pump and rotary output motor system having...

Reexamination Certificate

active

07913492

ABSTRACT:
A hydrostatic continuously variable transmission is configured by connecting a swash plate type plunger hydraulic pump P and a swash plate type plunger hydraulic motor via a hydraulic closed circuit. A continuous shift control is executed by variably controlling an inclined angle of the swash plate of the hydraulic motor. A valve spool movably arranged in a spool hole axially extends in a shaft that supports the hydraulic pump and the hydraulic motor and is configured by coupling a first spool member provided with a guide land fitted in a guide member and a second spool member provided with a central land and a left land and provided with a valve that connects and cuts off a clutch oil passage on the high pressure side and a clutch oil passage on the low pressure side according to axial movement by a coupling pin.

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patent: 2920772 (1999-04-01), None
patent: 2005-256979 (2005-09-01), None

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