Implements or apparatus for applying pushing or pulling force – Single throw lever – Special engaging feature
Patent
1977-11-17
1978-11-21
Watson, Robert C.
Implements or apparatus for applying pushing or pulling force
Single throw lever
Special engaging feature
B66F 1100
Patent
active
041262972
ABSTRACT:
A lever for lifting manhole covers comprising a foot, a key adapted to engage a keyhole in a manhole cover, said key being pivotally mounted on one end of the foot, a first roller mounted on the foot inwardly of the other end thereof for rotation about an axis transverse to the longitudinal axis of the foot, a second roller mounted on the foot adjacent the other end thereof for rotation about an axis parallel to the axis of rotation of the first roller, the rollers being located relative to each other so that they function as a rolling fulcrum, the first roller functioning initially as a pivot for lifting the manhole cover and the second roller functioning as a trolley to enable the lifted cover to be transported and an operating lever one end of which is connected to the foot adjacent said one end with the lever projecting at an angle therefrom.
REFERENCES:
patent: 2249603 (1941-07-01), Elkington
patent: 3275299 (1966-09-01), Meshew
patent: 3362684 (1968-01-01), Davenport
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