Handling: hand and hoist-line implements – Grapple – Fixed and moveable jaw
Patent
1994-10-06
1996-10-22
Kramer, Dean
Handling: hand and hoist-line implements
Grapple
Fixed and moveable jaw
294 92, B66C 142
Patent
active
055669999
ABSTRACT:
A differential hoist fixture is adapted to secure to the flange of a differential case to provide for the lifting thereof, as in rear axle differentials used in large over the road trucks, mining equipment, and other large industrial wheeled vehicles. The fixture includes two parallel jaws, with one including a clamping bolt therethrough, and a lifting arm at right angles to the two jaws. The clamping bolt may be inwardly angled in the jaw opening, so that as the differential is lifted, the tendency for the flange to slip from the jaw opening will tend to cock the clamping bolt outward, thus applying further clamping force. The opposite jaw may include inwardly angled teeth on the inner surface, facing the clamping bolt, for greater security. The attachment to the lifting arm may be adjustable, by a plurality of bolt holes or an elongated slot for the lifting bolt. The adjustability of the lifting bolt attachment enables the lifting force to be applied substantially over the center of gravity of the differential, thus providing for ease of alignment during reassembly.
REFERENCES:
patent: 2542289 (1951-02-01), Robbins
patent: 2636770 (1953-04-01), Cornwell
patent: 2652278 (1953-09-01), Allen
patent: 2693386 (1954-11-01), Renfroe
patent: 2764447 (1956-09-01), Schmidt
patent: 3008750 (1961-11-01), Wansley
patent: 3362684 (1968-01-01), Davenport
patent: 3958825 (1976-05-01), Diamond
patent: 4850630 (1989-07-01), Davies
Kramer Dean
Litman Richard C.
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