Control linkage for hydrostatic transmission

Details Control linkage for hydrostatic transmission Control linkage for hydrostatic transmission

1990-09-24

1992-03-10

Herrmann, Allan D.

192 clutches and power-stop control

Elements

Wear compensators

74473R, 74474, 192 4A, 192 4C, B60K 4122, B60K 2000

Patent

active

050943260

ABSTRACT:
A control linkage for controlling the speed and direction of a hydrostatic transmission in a lawn and garden tractor. A directional control arm, coupled to a dash mounted direction and speed control lever, pivots relative to the hydrostatic transmission in response to movement of the direction and speed control lever. A cam roller on the directional control arm engages a cam plate mounted on the control input shaft of the hydrostatic transmission so as to rotate the control input shaft in response to movement of the direction and speed control lever. A detent adjacent the transmission and engaging the cam plate fixes the position of the cam plate to eliminate backlash and avoid vehicle "creep" when the direction and speed control lever is placed in "neutral." An additional cam, responsive to engagement of a vehicle clutch/brake system automatically places the transmission in "neutral" when the clutch/brake system is engaged.

REFERENCES:
patent: 4064766 (1977-12-01), Rinaldo
patent: 4281737 (1981-08-01), Molzahn
patent: 4296846 (1981-10-01), Benson
patent: 4491209 (1985-01-01), Bening
patent: 4496035 (1985-01-01), Wanie
patent: 4759417 (1988-07-01), Wanie et al.
patent: 4771856 (1988-09-01), Hutchison et al.
patent: 4799397 (1989-01-01), Egidi et al.
patent: 4955249 (1990-09-01), Wetor

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