Neutral centering device for hydrostatic transmission

Details Neutral centering device for hydrostatic transmission Neutral centering device for hydrostatic transmission

1996-09-26

1997-10-14

Denion, Thomas E.

Expansible chamber devices

Displacement control of plural cylinders arranged in...

74475, 417219, F01B 106

Patent

active

056760345

ABSTRACT:
In a hydraulic transaxle, a radial ball piston pump and motor combination receive input torque and translate it into output torque, the direction of which is determined by the position of a cam ring located in the transaxle housing. This cam ring is movable by means of a control shaft which is manually operated. The invention provides an extended control pin linking the control shaft to the cam ring and a channel formed in the transaxle housing. When the control shaft nears a neutral center position, the channel and its rounded edges provide a detented ramp into which the length of a portion of the control pin may be seated. A spring acting on the control shaft urges the control pin into the detented position.

REFERENCES:
patent: 4958534 (1990-09-01), Takada et al.
patent: 4968227 (1990-11-01), Szulczewski et al.
patent: 5182966 (1993-02-01), von Kaler et al.
patent: 5234321 (1993-08-01), Gafvert
patent: 5279206 (1994-01-01), Krantz et al.

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