Method and apparatus for controlling an implement

Details Method and apparatus for controlling an implement Method and apparatus for controlling an implement

1991-09-13

1993-03-02

Look, Edward K.

Motors: expansible chamber type

Working member position feedback to motive fluid control

Electrical input and feedback signal means

91367, 91403, 91435, 91461, F15B 1316

Patent

active

051899400

ABSTRACT:
Vehicles having implements are typically used to perform repetitive functions in work cycles. An implement control system raises and lowers an implement relative to the vehicle and reduces the stresses applied to the vehicle from abruptly stopping the motion of the implement. A lever pilot signal is produced in response to the pivotal position of a control lever. An electrohydraulic pilot signal is also produced. The pilot signal having the greater pressure is directed to a main valve for controlling the position of the implement. The method and apparatus of the instant invention are applicable to a number of vehicles having a hydraulically operated implement.

REFERENCES:
patent: 3789739 (1974-02-01), Krehbiel et al.
patent: 3892079 (1975-07-01), Hirano et al.
patent: 4015729 (1977-04-01), Parquet et al.
patent: 4109812 (1978-08-01), Adams et al.
patent: 4166506 (1979-09-01), Tezuka et al.
patent: 4358989 (1982-11-01), Tordenmalm
patent: 4552503 (1985-11-01), Mouri et al.
patent: 4844685 (1989-07-01), Sagaser

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