Manway lift assist

Details Manway lift assist Manway lift assist

E - Fixed Constructions

02

D

94/12

E02D 29/14 (2006.01)

Patent

CA 2029150

PATENT PFP:235 CA MANWAY LIFT ASSIST Abstract of the Invention The invention relates to an improved balancing aid for a pivotally mounted cover for a manhole comprising means for hinging the cover relative to the manhole so the cover may be rotated about the hinge to expose and cover the manhole; and a spring retaining means comprising a rod pivotally secured to the cover, said rod being at least partially encased by a housing, said housing containing a compression spring means which is compressed when the cover is closed; wherein the improvement comprises securing the spring retaining means by attachment means which may be removed only after the spring means is first removed.

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