Implements or apparatus for applying pushing or pulling force – Method or apparatus for placement of conductive wire – Conduit snakes
Patent
1976-06-29
1978-01-17
Oresky, Lawrence J.
Implements or apparatus for applying pushing or pulling force
Method or apparatus for placement of conductive wire
Conduit snakes
212 46R, 214 86R, B66C 2360
Patent
active
040688275
ABSTRACT:
A portable hoist consisting essentially of three major components readily assembled and disassembled at the job site in a relatively short period of time to facilitate portability. The three basic components include a generally horizontally disposed main frame, an elongated upright mounted at one end of the main frame and a generally horizontally extending boom at the upper end of the upright with the boom and main frame extending from opposite sides of the upright and from the upper and lower ends respectively. The main frame includes structure enabling it to be supported by wheeled units, structure to enable an end portion of the frame remote from the upright to be anchored to a supporting deck or platform such as a truck or similar vehicle, a building floor or other support and an area receiving a counterweight at a point remote from the upright. The portable hoist has particular utility in lifting preassembled house panels or sections into place by being supported from the interior house deck without need for exterior landscaping or back-filling prior to wall erection. When used on multistory buildings, the portable hoist can simply be moved to upper floors as they are completed.
REFERENCES:
patent: 2320620 (1943-06-01), Tourneau
patent: 2378605 (1945-06-01), Watson
patent: 2822931 (1958-02-01), Sparrow
patent: 3433459 (1969-03-01), Logan
patent: 3458073 (1969-07-01), Dawson
patent: 3612566 (1971-10-01), Sholl
patent: 3716217 (1973-02-01), Watabe
Duimstra Dwight L.
Fanning Larry J.
Duimstra Dwight L.
Jacobson Harvey B.
O#Brien Clarence A.
Oresky Lawrence J.
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