Level lift hydraulic valve

Details Level lift hydraulic valve Level lift hydraulic valve

1988-01-28

1989-01-24

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

91520, 91532, 91535, B66F 900

Patent

active

047998512

ABSTRACT:
Level lifting and lowering of a working implement in combination with a hydraulic boom is provided through a hydraulic circuit and valve including a shuttle check valve, a rotary flow divider and a counterbalance valve. Selective operation results in the working implement being raised or lowered in a level displacement relative to the ground.

REFERENCES:
patent: 3811587 (1974-05-01), Seaberg
patent: 4709618 (1987-12-01), Zongker
patent: 4723478 (1988-02-01), Diel et al.

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