Material or article handling – Vertically swinging load support – Door remover
Patent
1992-11-12
1995-01-17
Underwood, Donald W.
Material or article handling
Vertically swinging load support
Door remover
212166, 254131, 294 97, 294 8213, 414910, 414911, B66F 1100
Patent
active
053821319
ABSTRACT:
A carriage supported tool for manipulating a heavy object including a mobile carriage assembly having a carriage supported on wheels, an elongated operating arm, and an elongated clamp-assembly support boom. Both the boom and the arm are attached to the carriage to form a lever with the carriage acting as a fulcrum. The clamp assembly is coupled to the boom by a chain and hook. The clamp assembly includes a plurality of adjustable jaw sets for engaging a heavy object, such as a manhole frame, which is to be moved.
REFERENCES:
patent: 682647 (1901-09-01), Scullin
patent: 2615839 (1954-04-01), Beasley
patent: 4359241 (1982-11-01), Kistner
patent: 4662607 (1987-05-01), Mochizuki et al.
Douvas Augustus G.
Underwood Donald W.
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