Apparatus for controlling movement of an implement relative to a

Details Apparatus for controlling movement of an implement relative to a Apparatus for controlling movement of an implement relative to a

1997-12-05

2000-08-08

Underwood, Donald W.

Material or article handling

Vertically swinging load support

Shovel or fork type

414700, E02F 300

Patent

active

060992360

ABSTRACT:
An apparatus for controlling movement of an implement relative to a frame of a work machine is disclosed. The apparatus includes a lift arm having an implement, such as a bucket, pivotally coupled thereto. The apparatus also includes a pivot bar which is pivotally coupled to the lift arm via a coupling pin. A first hydraulic cylinder is coupled to the pivot bar. A second hydraulic cylinder is also coupled to the coupling pin. The first hydraulic cylinder and the second hydraulic cylinder are both actuated so as to lift the lift arm. Moreover, the first cylinder is actuated so as to tilt the bucket. A number of position sensors are provided to communicate output signals indicative of the position of the lift arm and the bucket to a controller. The controller processes such output signals and thereafter alters the position of a pair of proportional fluid valves associated with the first and second hydraulic cylinders.

REFERENCES:
patent: 3140001 (1964-07-01), Strader
patent: 3987920 (1976-10-01), Parquet et al.
patent: 4006834 (1977-02-01), Anderson et al.
patent: 5184932 (1993-02-01), Misuda et al.
patent: 5188502 (1993-02-01), Tonsor et al.
patent: 5189940 (1993-03-01), Hosseini et al.
patent: 5195864 (1993-03-01), Drake et al.

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