Speed control system for a working vehicle

Details Speed control system for a working vehicle Speed control system for a working vehicle

1988-12-09

1990-12-18

Look, Edward K.

Power plants

Pressure fluid source and motor

Servo-motor having externally operated control valve sets...

60487, 91216A, 91506, 92117A, 921691, F16H 3946, B60K 2014

Patent

active

049777602

ABSTRACT:
A speed control system for a working vehicle comprises a hydrostatic transmission for propelling the vehicle, a hydraulic cylinder and a control valve. The hydraulic cylinder includes a cylinder case operatively connected to a control shaft for varying a swash plate angle of the hydrostatic transmission, and a piston rod fixed to a case containing the hydrostatic transmission. The control valve is fixed to the cylinder case and includes a spool extending parallel to the hydraulic cylinder and operatively connected to a foot pedal for manually controlling the hydrostatic transmission. The cylinder case is shiftable following a shift of the valve spool.

REFERENCES:
patent: 3107490 (1963-10-01), Cooper et al.
patent: 3127745 (1964-04-01), Young
patent: 3158068 (1964-11-01), Bokelman
patent: 3188810 (1965-06-01), Kuze
patent: 3412553 (1968-11-01), Wright
patent: 3555817 (1971-01-01), Hann
patent: 3669569 (1972-06-01), Wagenseil
patent: 3772888 (1973-11-01), Orlando
patent: 3823792 (1974-07-01), Dinkloh et al.

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