Access space cover lifting device

Details Access space cover lifting device Access space cover lifting device

2007-11-13

2007-11-13

Wilson, Lee D. (Department: 3723)

Implements or apparatus for applying pushing or pulling force

Single throw lever

Special engaging feature

C254S120000

Reexamination Certificate

active

11394689

ABSTRACT:
A cover lifting device for lifting a cover having two spaced lifting holes includes an elongate lever, a lifting hook affixed to one end portion for engagement with one hole, a sleeve freely slideably mounted between lever ends and another lifting hook, a flexible element attaches the second hook to the sleeve. The second hook has a shank with a straight axis and a lower gripping element. The improvement includes an upper connecting portion extending laterally of the axis and in an opposite direction to the element. The connecting portion has an opening to connect the element, which is offset from the axis to rotate the hook when a lifting force is applied at the opening.

REFERENCES:
patent: 1158232 (1915-10-01), Grau et al.
patent: 4991893 (1991-02-01), Gordon et al.
patent: 5462385 (1995-10-01), Mohlengraft
patent: 5775674 (1998-07-01), Bigham
patent: 6520482 (2003-02-01), Bigham
patent: 6676111 (2004-01-01), Bigham
patent: 6964407 (2005-11-01), Butler

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