Implements or apparatus for applying pushing or pulling force – Single throw lever – Special engaging feature
Patent
1983-03-18
1985-04-23
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Special engaging feature
B66F 300
Patent
active
045125546
ABSTRACT:
The invention relates to a levering tool useful to lift up a manhole cover from its housing and to drag it away from the manhole inlet. The tool comprises a base provided with anti-skidding elements formed of studs and a series of parallel plates, and a rigid and elongated power bar. This power bar has one extremity mounted for pivotal displacement onto the base so that the free extremity is moved along an arc in a predetermined direction. A link of appropriate resistance is set between the power bar and the cover, and fasteners firmly connect the latter to the bar through the link. The tool works to displace the cover by applying a small force on the free end of the power bar while maintaining the anti-skid base substantially stable, therefore maintaining safe operation by the user.
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patent: 4218043 (1980-08-01), Le Vert
patent: 4280683 (1981-07-01), Knierim
patent: 4338053 (1982-07-01), Abel
Hydro-Quebec
Watson Robert C.
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