Earthworking machine of the loader type

Details Earthworking machine of the loader type Earthworking machine of the loader type

1981-05-12

1983-03-15

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

414708, 91 33, E02F 342, E02F 922

Patent

active

043766129

ABSTRACT:
The invention relates to a hydraulic loader comprising a boom, a balance beam and a bucket for loading material, boom jacks and balance beam jacks being coupled between the frame and the boom and between the boom and the balance beam. A secondary jack is also coupled between the frame and the boom and comprises an active chamber, while a first conduit connects this active chamber to the extension chamber of the balance beam jack and a first cut-off valve is disposed in this first conduit, establishing, in its first position, communication of the two sections of the first conduit which are connected thereto, isolating, on the contrary, in its second position, these two sections. One application of the invention is the production of a powerful and efficient loader.

REFERENCES:
patent: 3966066 (1976-06-01), Schexnayder
patent: 4179981 (1979-12-01), Yeou
European Patent Application No. 0 004 839, Lundstrom, 1979.

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