Lifting fork

Details Lifting fork Lifting fork

1982-04-27

1984-10-09

Cherry, Johnny D.

Handling: hand and hoist-line implements

Hoistline attached load supporting frame

294 63R, 414639, 414645, B66C 124

Patent

active

044757581

ABSTRACT:
A lifting fork intended to be suspended from a lifting member, e.g. a lifting hook (4) of a hoisting crane, and which includes forks (2), a lifting shank (3) to which a movable attachment (7,11,14) for the lifting hook (4) is attached, and a connecting bar (5) extending between the forks and the lifting shank. In order to facilitate the withdrawal of the forks (2) from the load the point of action of the lifting force at the lifting fork by moving the attachment (7,11,14) is movable from the position at the lifting shank (3) to a position close to the rear end of the forks (2). This can be achieved in many ways, i.e. by means of the attachment (7,11,14) being displaceable from the lifting shank (3) down along the connecting bar (5) or by the connecting bar (5) or a part thereof possibly together with the lifting shank being pivotable backwards - downwards.

REFERENCES:
patent: 872651 (1907-12-01), Gordon
patent: 993145 (1911-05-01), Bradley
patent: 1564652 (1925-12-01), Wallace
patent: 1745839 (1930-02-01), Wallace
patent: 1765765 (1930-06-01), Luce
patent: 1811429 (1931-06-01), Fontaine
patent: 1818728 (1931-08-01), Mallery et al.
patent: 2133557 (1938-10-01), McNeillie
patent: 2849253 (1958-08-01), Bopp
patent: 2918322 (1959-12-01), Bopp
patent: 3165344 (1965-12-01), Holder

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