Earth-working machine

Details Earth-working machine Earth-working machine

1986-10-16

1988-05-24

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

37103, 73518, 318 67, 324208, 414694, E02F 502

Patent

active

047462647

ABSTRACT:
An earth-working machine includes a first internal gear fixedly mounted on a mobile chassis, a turntable coaxially rotatably mounted on the first internal gear, a carriage rotatably mounted on the turntable in eccentric relation thereto and having a second internal gear, an earth-working mechanism mounted on the carriage, a first hydraulic motor mounted on the turntable and having a first pinion held in driving mesh with the first internal gear for rotating the turntable about its own axis, a second hydraulic motor mounted on the turntable and having a second pinion held in driving mesh with the second internal gear for rotating the carriage about its own axis, and hydraulic driving devices for actuating the first and second hydraulic motors independently or in synchronism. The hydraulic driving devices may be controlled by an electric control system supplied with signals from angle detectors such as rotary encoders for detecting angular displacements of the turntable and the carriage.

REFERENCES:
patent: 4053826 (1977-10-01), Wasawa et al.
patent: 4150314 (1979-04-01), Zabler et al.
patent: 4283679 (1981-08-01), Ito et al.
patent: 4596508 (1986-06-01), Kishi et al.

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