Fork unit having adjustable forks

Details Fork unit having adjustable forks Fork unit having adjustable forks

1980-10-27

1983-04-26

Paperner, Leslie J.

Material or article handling

Vertically swinging load support

Shovel or fork type

74 8915, 414667, B60P 150, B66F 914

Patent

active

043811663

ABSTRACT:
A lift unit for attachment to a vehicle having hoist members. The lift unit rotatably supports a plurality of elongate threaded rods. A drive motor is operably connected to the elongate threaded rods for rotation thereof. Nut members are threadedly joined to each of the threaded rods. Carrier members enclose the nut members and prevent rotation thereof. The carrier members and the nut members thus move along the threaded rods as the threaded rods are rotated. Fork members are joined to the carrier members for movement therewith. Operation of the drive motor thus moves the forks and changes the spacing therebetween, for positioning the forks below an object or at opposed portions of an object for supporting the object during movement of the lift unit with movement of the hoist members.

REFERENCES:
patent: 1813596 (1931-07-01), Abbe
patent: 2339120 (1944-01-01), Ulinski
patent: 2451943 (1948-10-01), Gunning
patent: 2462691 (1949-02-01), Thompson
patent: 2483745 (1949-10-01), Vossenberg
patent: 3424328 (1969-01-01), Gideonsen et al.
patent: 3596968 (1971-08-01), Holm
patent: 4280781 (1981-07-01), Bodin
patent: 4335992 (1982-06-01), Reeves

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