Traversing hoists – Having means facilitating assembly or disassembly
Patent
1985-12-23
1986-11-11
Blix, Trygve M.
Traversing hoists
Having means facilitating assembly or disassembly
212261, 212265, B66C 2326
Patent
active
046217410
ABSTRACT:
A portable, readily disassembleable, roof hoist mounted on the roof of a building for lifting heavy products, such as heavy rolls of roofing to the roof wherein a first, base, A-frame is disposed transversely to the edge of the roof with the ends of its legs adjacent an edge of the roof, and lies with its apex rearward on the roof, free of any securement to the roof. A second, generally vertically disposed A-frame has its leg ends releasably pivotally connected to the leg ends of the first A-frame for fore and aft vertical swinging movement of its apex from a position above a location spaced substantially inboard of the edge of the roof to a position substantially outboard of the edge of the roof. An elongate forwardly extending hydraulic cylinder has a cylinder rod pivotally releasably connected to the apex of the second A-frame, and its opposite end is pivotally releasably connected at the apex of the first A-frame. A winch drum driven by a hydraulic motor is mounted at the apex of the first frame and has a cable extending around a sheave at the apex of the second A-frame to support a load and a hydraulic pump and internal combustion engine assembly is detachably connected to weight down the base A-frame and is hydraulically coupled with the cylinder and motor to drive them selectively.
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patent: 4578016 (1986-03-01), Richardson
Avila Stephen P.
Blix Trygve M.
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