Handling: hand and hoist-line implements – Spacing hoist bar or frame – With center of gravity adjustment
Patent
1984-09-19
1986-12-02
Marbert, James B.
Handling: hand and hoist-line implements
Spacing hoist bar or frame
With center of gravity adjustment
294 691, 294 6721, B66C 110
Patent
active
046260129
ABSTRACT:
A device for lifting and tilting an object in one plane alone or in two planes simultaneously is described. The device for tilting an object in one plane comprises a rectangular frame with two end blocks and a carriage with wheels contained inside the frame. The carriage has a threaded hole to receive a threaded rod also located inside the frame with the rod extending through the end blocks. A crank on one end when turned moves the carriage in the frame. An eyebolt on the carriage is hooked to a hoisting chain and the lifting means is attached to both the end blocks and the object to be lifted. When the object is lifted, and the crank is turned, the center of gravity is moved away from being concentric with the hoisting chain and the object is tilted.
When it is desired to tilt the object in two planes, the second plane being orthogonal to the first, the device as described above is used for tilting in the first plane and a rectangular member being in the second plane is slid through an opening in the carriage to offset the center of gravity from aligning with the hoisting chain and tilt the load in the second plane. The dual plane load positioner also has a chain or cable attached to each end of the rectangular member. The cable or chain is threaded through a lockable pulley which is attached to the lower end of the hoisting chain. The dual load positioner can thereby tilt a load in two planes simultaneously. Depending on the amount of tilt in each plane, the dual load positioner can lift an object through any restricted access hole that the object can conceivably pass through.
REFERENCES:
patent: 1649364 (1927-11-01), Peterson
patent: 2412488 (1946-12-01), Austin
patent: 3433459 (1969-03-01), Logan
patent: 3751097 (1973-08-01), Jones et al.
patent: 4139179 (1979-02-01), Kukulaki
patent: 4355832 (1982-10-01), Andersen
patent: 4431223 (1984-02-01), Miller
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