Dual lifting manhole cover

Road structure – process – or apparatus – Pavement – Vault cover-closure

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C454S048000, C137S371000, C052S019000

Reexamination Certificate

active

07905679

ABSTRACT:
A one-piece, unitary manhole cover has dual lifting ports that drain through the outer circumferential edge of the cover. A lifting channel runs from the interior of the upper face out to the outer circumferential edge. A lifting bar spans the lifting channel and defines an ergo lifting port and a pry bar lifting port. Both the ergo lifting port and the pry bar lifting port drain through the outer circumference of the manhole cover.

REFERENCES:
patent: 2323886 (1943-07-01), Wirz, Jr.
patent: 2655399 (1953-10-01), McMillan
patent: 3209663 (1965-10-01), Baier
patent: 4101236 (1978-07-01), Meyer
patent: 4123184 (1978-10-01), Whitlock
patent: 4482182 (1984-11-01), Mortensen
patent: 4523407 (1985-06-01), Miller
patent: D306482 (1990-03-01), Milo
patent: 5462385 (1995-10-01), Mohlengraft
patent: 5865425 (1999-02-01), Meadows
patent: 6109822 (2000-08-01), Campbell et al.
patent: 6202986 (2001-03-01), Goldman
patent: 6595566 (2003-07-01), Donnan
patent: 2008/0159810 (2008-07-01), Myers

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Dual lifting manhole cover does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual lifting manhole cover, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual lifting manhole cover will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2670898

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.