Handling: hand and hoist-line implements – Grapple – Pivoted jaws
Patent
1979-12-26
1981-04-21
Marbert, James B.
Handling: hand and hoist-line implements
Grapple
Pivoted jaws
294118, B66C 142
Patent
active
042629527
ABSTRACT:
A lifting tong link arm-to-tong arm toggle lock comprised of a rack and pinion sub-assembly member operably interposed to work angularly across one of the two symmetrical pivotally assembled scissor-acting upper link arm-to-lower tong arm junctures of a simple tong grab toggle structure, wherein the pinion wheel thereof is further provided with a ratchet wheel axially affixed thereto whereby the cooperatively activated release or engagement of a solenoid operated pawl with the ratchet tooth structure thereof respectively enables either opening of the tong for a grappling load engagement thereby or locking of the extended load suspending lifting tong structure when a load is grappled for movement thus providing a positive mechanical capability to prevent either an accidental or unintentional operator release of the load upon a load support surface after grapple displaced transport of a load from one location to another intermediate of and prior to accomplishing a final placement positioning deposit thereof.
REFERENCES:
patent: 937115 (1909-10-01), Douglos et al.
patent: 1472081 (1923-10-01), Mercer
patent: 1492999 (1924-05-01), Mercer
patent: 1506827 (1924-09-01), Gellert
patent: 1839389 (1932-01-01), Heppenstall
patent: 1851923 (1932-03-01), McQuigg
patent: 2803489 (1957-08-01), Zito et al.
Bradley Lifting Corp.
Learned Jr. Samuel M.
Marbert James B.
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