Portable jack

Details Portable jack Portable jack

1988-01-29

1989-05-16

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Hoisting truck

Screw

269 17, B60P 110

Patent

active

048303356

ABSTRACT:
A portable jack comprising a wheeled base and a support structure pivotably attached to the base. The support structure is pivotable from a lowered position in which the support structure is essentially co-planar with the plane of the base to an upright position in which the support structure is essentially perpendicular to the base. The support structure comprises spaced parallel guide members having hinged ends connected to the base to allow pivoting of the support structure. A locking device is provided to lock the support structure in an upright position. The support structure uses a carriage member which moves slidably along the guide members to support an article to be lifted.

REFERENCES:
patent: 1909023 (1933-05-01), Statz
patent: 2398584 (1946-04-01), Goodrich
patent: 2702689 (1955-02-01), Smith
patent: 2814099 (1957-11-01), Knittel
patent: 3102648 (1963-09-01), Hughes
patent: 3109625 (1963-11-01), Arnes et al.
patent: 3391905 (1968-07-01), Burns

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