Handling: hand and hoist-line implements – Grapple – Pivoted jaws
Patent
1975-09-23
1976-10-19
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Pivoted jaws
24248C, 24248E, B25B 508, B66C 148
Patent
active
039867463
ABSTRACT:
A clamping attachment for tensile pulling devices has a pair of clamping members designed to be arranged side by side, the members each being designed to provide one of a pair of facing jaws. The clamping members and the jaws are arranged to allow the jaws to grasp a member between them. The jaws are each provided with bores designed to be aligned when they are grasping a member between them and a bolt is provided designed to extend through the aligned bores, the bolt having a head on one end and a nut on the other. Each of the bores at their outwardly facing ends is enlarged to provide a surface defining a cavity at the corresponding entrance to the bores. Bearing members are provided adjacent each and of the bolt designed to contact the respective surfaces of the cavities and to bear thereon as the nut is tightened. The surfaces are shaped to allow the bearing members to move thereover as the bolt moves over a predetermined angular range relative to the clamping member and the bores are made sufficiently larger than the bolt to allow movement over such predetermined angular range. A member is provided for allowing tensile pull on the clamp on the side of the bolt remote from said jaws, the means being designed, upon the exertion of the tensile pull, to tend to spread the jaws at the end thereof remote from said clamping surfaces, whereby the jaws tend to pivot about the bearing members.
REFERENCES:
patent: 995541 (1911-06-01), Kelly
patent: 2037589 (1936-04-01), Pilkington
patent: 2383078 (1945-08-01), Pringle
patent: 2560929 (1951-07-01), Calbeck
patent: 3744838 (1973-07-01), Jackson
patent: 3879814 (1975-04-01), Mojelski
Cherry Johnny D.
Guy-Chart Tools Limited
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