Control device for an earthwork machine

Details Control device for an earthwork machine Control device for an earthwork machine

1979-10-04

1982-06-01

Blix, Trygve M.

Material or article handling

Vertically swinging load support

Shovel or fork type

37DIG1, 414728, 364424, E02F 332

Patent

active

043325173

ABSTRACT:
The control device for an earthwork machine according to the invention is designed for reducing the manufacturing cost of the earthwork machine by eliminating some of the calculating circuitry and the control circuitry. According to the control device, one of the cylinders necessary for carrying out straight excavation is directly manually controlled without using calculating circuitry, and the operations of the cylinders are respectively detected by detecting circuitry. The other two cylinders are also controlled by the arithmetic unit provided in the control device for performing calculation necessary to move the sharp edge of the bucket along a straight line of predetermined inclination in accordance with detected pivoted angles of the boom, arm and bucket.

REFERENCES:
patent: 3386689 (1968-06-01), Parker
patent: 3636325 (1972-01-01), Chytil
patent: 3656640 (1972-04-01), Schwing
patent: 3997071 (1976-12-01), Teach
patent: 4015729 (1977-04-01), Parquet
patent: 4059196 (1977-11-01), Uchino

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