Apparatus for operating and transferring manhole cover

Details Apparatus for operating and transferring manhole cover Apparatus for operating and transferring manhole cover

1986-01-24

1987-03-31

Watson, Robert C.

Implements or apparatus for applying pushing or pulling force

Single throw lever

Special engaging feature

B66F 1100

Patent

active

046537287

ABSTRACT:
An apparatus for operating and transferring a manhole cover is disclosed which is capable of being applicable to a manhole cover formed with any through-hole type operating hole and preventing the disengagement of the manhole cover from the apparatus. The apparatus includes a lever body having a pair of operating arms. The operating arms each have an eccentric hanging hook pivotally mounted thereon and a press member which is adapted to abutted against a manhole cover to horizontally support it during the lifting operation. The hanging hook comprises a vertical support member pivotally mounted on the operating arm to be pivotally moved in the longitudinal direction of the apparatus and a hanging member connected to the support member to inwardly extend therefrom in a manner to be deviated in the direction opposite to that of a point of force. The apparatus has a manhole cover lifting position which is deviated toward the press member with respect to the gravity line of the manhole cover.

REFERENCES:
patent: 4126297 (1978-11-01), Barnes
patent: 4488706 (1984-12-01), Kono

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