Traversing hoists – Having means facilitating assembly or disassembly – Of traversing hoist from support
Patent
1990-12-27
1991-11-12
Peters, Jr., Joseph F.
Traversing hoists
Having means facilitating assembly or disassembly
Of traversing hoist from support
212175, 212196, 212179, B66C 2326
Patent
active
050640798
ABSTRACT:
A portable wheeled hoisting frame includes two winches. The hoist disassembles, and the parts fit into a backpack. When assembled the frame has an open rectangular base with corner wheels, two upright members, and a top bar between the upper ends of the two upright members extending across above the open base. The primary winch is mounted on the top bar. There are top bar extensions. The hoist can vertically lift objects under the frame, as when straddling a scuttle hole, with the primary winch. A secondary winch attached to the hoisting frame can exert a sideways or downward force for cantilever lifting. The force of the secondary winch will then balance the weight of the object held by the primary winch. The extension bars allow hoisting in numerous ways. An object may also be supported on the frame base for rolling on supporting surfaces. There are two fixed wheels and two swivel castors on the frame.
REFERENCES:
patent: 510495 (1893-12-01), Zetterberg
patent: 655522 (1900-08-01), Seaver et al.
patent: 708551 (1902-09-01), Hill
patent: 2699874 (1955-01-01), Bernaerts
patent: 3494492 (1970-02-01), Thiermann
patent: 3521860 (1970-07-01), Zehrung, Jr. et al.
patent: 4003479 (1977-01-01), Reyer
patent: 4113112 (1978-09-01), Ray
patent: 4421242 (1983-12-01), Brueske
Johnson R. B.
Litman Richard C.
Peters Jr. Joseph F.
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