Handling: hand and hoist-line implements – Grapple – Lewises
Patent
1990-10-30
1992-04-14
Cherry, Johnny D.
Handling: hand and hoist-line implements
Grapple
Lewises
294 8234, B66C 136, B66C 166
Patent
active
RE0338818
ABSTRACT:
An apparatus for lifting precast concrete panels includes a lifting body having a forward portion adapted to engage in an anchor head, a latch yoke pivotally connected to a rearward end of the lifting body and including a safety latch cooperating with the forward portion of the lifting body to lock an anchor head to the forward portion, a release yoke pivotally attached to the lifting body for movement between locked and release positions and including a cam [roller for urging] effective during movement of the release yoke to its release position to cause the latch yoke to pivot to a release portion, and a lifting bail pivotally attached to the forward portion. The [lifting body] release yoke includes a safety pin block extending [upwardly] from a rearward portion thereof adjacent [to] the rearward end of the latch yoke. The latch yoke and safety pin block include bores which are in registry with each other when the apparatus is oriented to a locked position. A safety pin is inserted into the bores and prevents relative pivotal movement between the latch yoke and [lifting body] release yoke, and is removable from the bore by a lanyard which is pulled by a worker.
REFERENCES:
patent: 4173367 (1979-11-01), Haeussler
patent: 4368914 (1983-01-01), Truitt et al.
Courtois Peter D.
Truitt Robert E.
Cherry Johnny D.
Dayton Superior Corporation
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