Handling: hand and hoist-line implements – Grapple – Pivoted cam and hook
Patent
1979-12-07
1982-05-04
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Pivoted cam and hook
294104, B66C 148
Patent
active
043279449
ABSTRACT:
A clamping device for handling and lifting metal sheets is disclosed. The device has a body member with a first flanged portion and a second flanged portion mounted adjacent to the first flanged portion. The first and second flanged portions define an opening therebetween for receiving metal sheets therebetween. A cam member includes an adjustable grip portion and an opposite leg portion. The cam member is attached to the first flanged portion so as to permit the adjustable grip portion to rotate in the opening from a first open position to a second closed position. The cam member is biased to a closed position by a helical spring member acting on the opposite leg portion. The spring member is supported on the other end by the body member and coiled about a pivot pin. The cam member is automatically locked in an open position by a lever engaging a pin on the cam member adjacent the adjustable gap portion. One leg of the lever arm extends through the opening between the two flanged portions. When the upper edge of the sheet metal engages the leg, the lever releases the pin on the cam member and the adjustable gap portion rotates to clamp the metal sheet.
REFERENCES:
patent: 2360601 (1944-10-01), Waldrup
patent: 2647007 (1953-07-01), Gmoser et al.
patent: 3071406 (1963-01-01), Lucker
patent: 3189377 (1965-06-01), Gardner
patent: 3441308 (1969-04-01), Gardner
patent: 3857600 (1974-12-01), Hasegawa
Cherry Johnny D.
VanOphem Remy J.
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