Handling: hand and hoist-line implements – Grapple – Pivoted jaws
Patent
1999-02-24
2000-01-11
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Pivoted jaws
294117, 294119, B66C 142
Patent
active
06012752&
ABSTRACT:
A pipe lifter with lockable and releasable scissors grip structure, for laying large pipes. The apparatus includes a solid stabilizing plate over cooperating tongs, the base of the plate being capable of rotating about an axis parallel to the central axis of the pipe. The pipe lifter has reinforced linkage members, and multiple ribs between tong pairs, as well as multiple sets of cooperating tong pairs; thus the lifter is capable of withstanding tremendous torsional forces while safely navigating the piping into even very narrow trenches. The device includes a one-piece handle/latch assembly that a helper may operate safely, i.e., while maintaining a distance from any potential pinch points.
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Cherry Johnny D.
Litman Richard C.
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