Manway and manhole particularly suited for negative pressure...

Details Manway and manhole particularly suited for negative pressure... Manway and manhole particularly suited for negative pressure...

2005-11-22

2005-11-22

Will, Thomas B. (Department: 3671)

Road structure, process, or apparatus

Pavement

Vault cover-closure

C052S020000

Reexamination Certificate

active

06966724

ABSTRACT:
Method of replacing a blind flange manhole cover of the type including a bolted on blind flange mounted on a bolting flange of a negative pressure storage tank manway with a manhole cover having a hinged door assembly includes the step of removing the blind flange manhole cover from the bolting flange of a tank-installed manway. The manhole cover may be attached to the bolting flange of the existing manway. A seal may be provided for creating a leakproof joint between the cover and a cover receiving surface when the hingedly attached manhole cover is in a closed position. A manway having a hingedly attached manhole cover may be provided with a hinge frame. A locking assembly may be provided adjacent the cover that includes a locking and sealing element for engaging the cover with a seal for locking and sealing the manway.

REFERENCES:
patent: 2744654 (1956-05-01), Swerdlow
patent: 3077360 (1963-02-01), Israel
patent: 3591124 (1971-07-01), Haslett
patent: 3721363 (1973-03-01), Bressler et al.
patent: 3744670 (1973-07-01), De Frees
patent: 4021014 (1977-05-01), Craig
patent: 4589530 (1986-05-01), Sher
patent: 4767095 (1988-08-01), Fitzgerald et al.
patent: 4887789 (1989-12-01), Harris et al.
patent: 5366317 (1994-11-01), Solimar
patent: 5394650 (1995-03-01), Dean
patent: 5535565 (1996-07-01), Majnaric et al.
patent: 5874016 (1999-02-01), Bacon, Jr. et al.
patent: 6109823 (2000-08-01), Halferty et al.
patent: 6371698 (2002-04-01), Beck, III et al.

Affiliated with

Also associated with

Rating

Manway and manhole particularly suited for negative pressure... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Manway and manhole particularly suited for negative pressure..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Manway and manhole particularly suited for negative pressure... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3469803