Pipe joints or couplings – Molded joint – Lining or cover molded to pipe end
Reexamination Certificate
2006-08-01
2006-08-01
Hewitt, James M. (Department: 3679)
Pipe joints or couplings
Molded joint
Lining or cover molded to pipe end
C285S286100, C285S286200, C285S290100, C285S290300, C285S290400, C285S331000, C285S420000, C285S903000
Reexamination Certificate
active
07083204
ABSTRACT:
A coupling for joining metal pipes or pipe sections end-to-end to form a pipe assembly. A plastic cuff is formed on one of the pipe ends and a mating, second plastic cuff is formed on the other pipe end. In one embodiment, a wire hoop is mounted over each pipe end, the hoops are rotatable around the associated pipe ends to align the hoops, and bolt assemblies spanning the two hoops are used to tighten the hoops axially, to thereby clamp the pipe ends and compress the cuffs between the pipe ends and provide a leak-proof joint. The cuffs are selected from configurations including tongue-and-groove and bell-and-spigot. The cuffs can be formed on the pipe ends in the shop, then the pre-cuffed pipe sections can be readily assembled into stable, leak-proof, corrosion-resistant lengths of pipe in the field.
REFERENCES:
patent: 103423 (1870-05-01), Brown
patent: 198508 (1877-12-01), Dowling
patent: 214812 (1879-04-01), Clark
patent: 283975 (1883-08-01), Converse
patent: 311178 (1885-01-01), Duffy
patent: 652396 (1900-06-01), Lovekin
patent: 1267313 (1918-05-01), Cook
patent: 1467064 (1923-09-01), Oleson
patent: 1906826 (1933-05-01), Smith et al.
patent: 2081021 (1937-05-01), Smith et al.
patent: 2179629 (1939-11-01), Hering
patent: 2464744 (1949-03-01), Fennema
patent: 2606574 (1952-08-01), Lefebvre
patent: 2867454 (1959-01-01), Pollia
patent: 2992838 (1961-07-01), Wallace
patent: 3406986 (1968-10-01), Jennings
patent: 3977709 (1976-08-01), Hatzis
patent: 4702498 (1987-10-01), Mueller et al.
patent: 4763932 (1988-08-01), Matz et al.
patent: 5401062 (1995-03-01), Vowles
patent: 5429397 (1995-07-01), Kanao
patent: 5709414 (1998-01-01), Bailey et al.
patent: 5876070 (1999-03-01), McNealy et al.
patent: 5944362 (1999-08-01), Harle
patent: 6581984 (2003-06-01), Seung-Kyu
patent: 2003/0127848 (2003-07-01), Campbell
patent: 2-8588 (1990-01-01), None
Freitas Daniel D.
Miller Robert F.
Dalton Philip A.
Hewitt James M.
Pacific Roller Die Company, Inc.
LandOfFree
Composite metal pipe coupling and assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Composite metal pipe coupling and assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Composite metal pipe coupling and assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3646655