Handling: hand and hoist-line implements – Article carrier gripped and carried by hand – Convertible to – or useable as – different device or different...
Patent
1976-09-07
1978-05-23
Hoffman, Drayton E.
Handling: hand and hoist-line implements
Article carrier gripped and carried by hand
Convertible to, or useable as, different device or different...
214653, 294 87R, 294 88, 294104, B66C 144
Patent
active
040906280
ABSTRACT:
A forklift clamp having first and second arms extending horizontally outwardly and having generally flat outsides and insides and a thin cross section whereby the arms may readily move into and out of small spaces. At least one of the arms is movable toward the other arm for supporting a load therebetween. At least one of the arms is pivotally connected at its inner end to a vertical frame and hydraulic power means rotates the pivoting arm about the pivot inwardly for moving the outer ends of the arms toward each other for uniformly distributing the gripping pressure of the flat insides of the arm on a load, and rotate the arm outwardly for providing an operating clearance between the outer ends of the arms and the load. Preferably, the arms are decreasingly tapering in thickness from the inner ends towards the outer ends for decreasing the operating clearance required. Preferably, the arms are supported in horizontal tracks which are rotated for rotating the arms. The arms may include a concavity in their insides equal to approximately one-sixth of the deflection of the outer ends of an arm when carrying a load to increase equalization of the gripping force.
REFERENCES:
patent: 2874862 (1959-02-01), Farmer
patent: 3127209 (1964-03-01), Faust
patent: 3252609 (1966-05-01), Ellis
patent: 3866780 (1975-02-01), Miller
Abraham George F.
Anderson, Clayton & Co.
Hoffman Drayton E.
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