Road structure – process – or apparatus – Pavement – Vault cover-closure
Reexamination Certificate
2006-12-26
2006-12-26
Hartmann, Gary S. (Department: 3671)
Road structure, process, or apparatus
Pavement
Vault cover-closure
Reexamination Certificate
active
07153057
ABSTRACT:
An improved temporary manhole insert for securing a manhole passageway having a generally cylindrical structure with an inflatable, ring like tube encompassing the outer rim of the rigid portion of the insert. The insert with the inflatable ring is placed within the manhole aperture and then inflated to expand until the insert is secured in position. The manhole insert of the present invention prevents debris such as rocks, dust, asphalt and other debris from falling into the manhole during adjustments to the casting and also prevents debris from going into the sewer system such as pipes and pumps.
REFERENCES:
patent: 1940924 (1933-12-01), Taylor
patent: 3294000 (1966-12-01), Pelsue
patent: 3946761 (1976-03-01), Thompson et al.
patent: 4029425 (1977-06-01), Pelsue
patent: 4050839 (1977-09-01), Vollmar
patent: 4373381 (1983-02-01), Kulp et al.
patent: 4469467 (1984-09-01), Odill et al.
patent: 4614206 (1986-09-01), Mathison et al.
patent: 4763511 (1988-08-01), Mathison et al.
patent: 5046886 (1991-09-01), Muir et al.
patent: 5052851 (1991-10-01), Frishauf
patent: 5333653 (1994-08-01), Rzesutock et al.
patent: 6007270 (1999-12-01), Bowman
patent: 6152455 (2000-11-01), Brockway et al.
patent: 6682257 (2004-01-01), Zappe
patent: 6887012 (2005-05-01), Zappe
patent: 6953194 (2005-10-01), Brockway
patent: 1.329.558 (2003-07-01), None
patent: 1.032.839 (1966-06-01), None
patent: 2.285.473 (1995-07-01), None
patent: 2000055289 (2000-02-01), None
Hartmann Gary S.
Kroll Michael I.
LandOfFree
Securable temporary 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 Securable temporary manhole cover, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Securable temporary manhole cover will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3689738