Manhole cover removal apparatus and method of use

Details Manhole cover removal apparatus and method of use Manhole cover removal apparatus and method of use

2008-06-17

2008-06-17

Hartmann, Gary S (Department: 3671)

Road structure, process, or apparatus

Process

Handling or treating preformed modular unit

C254S011000, C414S756000

Reexamination Certificate

active

07387463

ABSTRACT:
An apparatus for separating and lifting a manhole cover from a cover mounting ring without disturbing the mounting ring includes a body, a lever arm and lifting arm pivotally connected to the body with the outer end of the lifting arm extending outwardly from the first end of the body, an preferably hydraulic actuator for raising and lowering the outer end of the lifting arm, and a ring engagement plate extending outwardly from the first end of the body below the lifting arm, to be received over the cover mounting ring. The apparatus may be constructed by modifying a conventional hydraulic floor jack. Upon activation of the hydraulic actuator lifting force is imposed between the cover and the cover mounting ring to separate and lift the cover without disturbing the mounting ring.

REFERENCES:
patent: 3861649 (1975-01-01), Mosley
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patent: 4746098 (1988-05-01), Abarotin
patent: 4991893 (1991-02-01), Gordon et al.
patent: 5035336 (1991-07-01), Schmitz et al.
patent: 5775674 (1998-07-01), Bigham
patent: 5993106 (1999-11-01), Huang
patent: 6554254 (2003-04-01), Vetesnik
patent: 6609742 (2003-08-01), Macom et al.
patent: 6945742 (2005-09-01), Roberts

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