Corrugation structure for pipe

Details Corrugation structure for pipe Corrugation structure for pipe

2005-01-11

2005-01-11

Brinson, Patrick (Department: 3752)

Pipes and tubular conduits

Flexible

Corrugated

C138S122000, C138S173000, C138S177000

Reexamination Certificate

active

06840285

ABSTRACT:
A corrugated pipe (2) has a plurality of corrugation structures (10, 12) positioned adjacent one another. The corrugation structures (10, 12) comprise an inner cylindrical wall (22), two annular wall portions (28, 32) that extend outwardly from the inner cylindrical wall (22), and a bowed annular wall portion (40) that is connected to the outer ends (36, 38) of the two annular wall portions (28, 32). The corrugation structure (10, 12) includes a centroid (48, 49) and at least a portion of the inner surface (50) of the bowed wall portion (40) has a radius R1centered on the centroid (48, 49) and at least a portion of the outer surface (52) of the bowed wall portion (40) has a radius and at least R2centered on the centroid (48, 49). The cavity (56) defined by the corrugation structure (10, 12) has an inner surface with an inner radius R2centered on the centroid (48, 49). The cavity (56) defined by the corrugation structure (10, 12) has a inner surface with an inner radius R1, R3that is equal to or greater than one half the thickness T1of the inner cylindrical wall (22). The profile of the corrugation structure (10, 12) is configured to optimally accept forces caused by backfill soil positioned over the pipe (2). A method of manufacturing a corrugated pipe (2) includes manufacturing a first, a second, and a third corrugated pipe (80, 90, 100) with each pipe having an inner diameter ID and an outer diameter OD. The inner diameter ID is chosen such taht the first pipe (80) can be telescopically inserted into the second pipe (90) and the second pipe (90) can be telescopically inserted into the third pipe (100). A method of shipping a plurality of different diameter pipes is also provided.

REFERENCES:
patent: 3926222 (1975-12-01), Shroy et al.
patent: 3929359 (1975-12-01), Schmunk et al.
patent: 4082327 (1978-04-01), Sting et al.
patent: 4202568 (1980-05-01), Strom
patent: 4487232 (1984-12-01), Kanao
patent: 4779651 (1988-10-01), Hegler et al.
patent: 4915425 (1990-04-01), Hegler et al.
patent: 4969670 (1990-11-01), Bonnema et al.
patent: 5053097 (1991-10-01), Johansson et al.
patent: 5071173 (1991-12-01), Hegler et al.
patent: 5148837 (1992-09-01), .ANG.gren et al.
patent: 5390704 (1995-02-01), Kanao
patent: 5727599 (1998-03-01), Fisher et al.
patent: 5803132 (1998-09-01), Lupke
patent: 5975143 (1999-11-01), Jarvenkyla et al.
patent: 6186182 (2001-02-01), Yoon
patent: 6343623 (2002-02-01), Hegler
patent: 6399002 (2002-06-01), Lupke et al.
patent: 6607010 (2003-08-01), Kashy
patent: 6644357 (2003-11-01), Goddard
International Search Report dated Jun. 12, 2002 (3 pgs.).

Affiliated with

Also associated with

Rating

Corrugation structure for pipe does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Corrugation structure for pipe, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Corrugation structure for pipe will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3420381