Implements or apparatus for applying pushing or pulling force – Single throw lever – Lazy tongs
Reexamination Certificate
2006-11-27
2011-11-08
Hail, Joseph J (Department: 3723)
Implements or apparatus for applying pushing or pulling force
Single throw lever
Lazy tongs
C254S124000, C254S126000
Reexamination Certificate
active
08052121
ABSTRACT:
The invention involves a scissor jack having four arms hingedly arranged to provide two opposite elbows between a base and a load support. A pair of trunnions at the elbows is connected by a threaded shaft. A movable brace is supported between the arms. The brace strengthens and adds support to the jack assembly. In a preferred embodiment, the brace includes a guide assembly which slidably engages the shaft and connectors pivoted between the guide and each of the four arms. The connectors are extensible socket and rod arrangements. Each connector includes a coil spring located over the rod in the socket. The four springs are compressed on extension of the jack to assist in lifting a load.
REFERENCES:
patent: 6161816 (2000-12-01), Kikuchi
patent: 6334605 (2002-01-01), Kikuchi
patent: 334 283 (1930-09-01), None
patent: 334283 (1930-09-01), None
International Search Report for PCT/IB2006/054465, date of mailing Oct. 24, 2007.
Hail Joseph J
Hamilton Brook Smith & Reynolds P.C.
McDonald Shantese
Quaddro Technologies (PTY) Ltd.
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