Manhole cover lifting apparatus and method

Material or article handling – Vertically swinging load support – Door remover

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C212S166000, C254S13300A

Reexamination Certificate

active

08043041

ABSTRACT:
A manhole lifting apparatus comprising a base support assembly and a lifting mechanism. There is a beam structure which extends over the manhole, with a pivot support at one end of the beam structure, and a mobile support at the opposite end of the beam structure. The lifting mechanism is at the central part of the beam structure. The lifting mechanism lifts the manhole cover, and the support assembly is rotated about the pivot support to remove the manhole cover from the manhole.

REFERENCES:
patent: 1083182 (1913-12-01), Bean
patent: 1890765 (1932-12-01), Zent
patent: 3885688 (1975-05-01), Larsen
patent: 4181290 (1980-01-01), Affolter
patent: 4321003 (1982-03-01), Castle
patent: 4365925 (1982-12-01), Gritz
patent: 4488706 (1984-12-01), Kono
patent: 4653728 (1987-03-01), Mochizuki et al.
patent: 4662526 (1987-05-01), Schaller
patent: 4662607 (1987-05-01), Mochizuki et al.
patent: 4746098 (1988-05-01), Abarotin
patent: 5035336 (1991-07-01), Schmitz et al.
patent: 5674045 (1997-10-01), Eckloff et al.
patent: 2045206 (1980-10-01), None
patent: 2111017 (1983-06-01), None

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

Manhole cover lifting apparatus and method does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

     

Profile ID: LFUS-PAI-O-4277913

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