Pipes and tubular conduits – Flexible – Spirally wound material
Patent
1996-10-11
1998-03-24
Brinson, Patrick F.
Pipes and tubular conduits
Flexible
Spirally wound material
138129, 138130, F16L 1104
Patent
active
057301883
ABSTRACT:
A flexible conduit formed by a helically wound band of metal that resists burst pressure. The band has a leading edge hook and a trailing edge hook that engage and interlock. The cross-section of the band has a radially asymmetrical Z-shaped profile. When the band is helically wound, the downstream hook of one turn of the band is received in the upstream valley of the previous turn of the band so that the downstream and upstream hooks form an interlock holding the windings together. In the wound configuration, the thickness of the profile between the upstream valley and the internal surface of the tube is greater than the thickness of the profile between the downstream valley and the external surface of the tube to provide greater material thickness to reduce contact stress at the hook and valley interface and to reduce alternating stresses in the valley corners. The outer surface of the profile tapers towards the center of the tube to direct externally applied radial compression forces toward the thickest section of the profile. A multilayer conduit employing the band may include a central, helically wound collapse-resistant layer disposed within a flexible fluid barrier that in turn is disposed within the tube formed by the band. The conduit may be wrapped with one or more tensile strength layers, anti-wear layers, and additional fluid barriers.
REFERENCES:
patent: 712418 (1902-10-01), Rudolph
patent: 1068553 (1913-07-01), Abell
patent: 1145434 (1915-07-01), Pechstein
patent: 1781574 (1930-11-01), Frederickson
patent: 4119123 (1978-10-01), Samuels
patent: 4377186 (1983-03-01), Genini et al.
patent: 4549581 (1985-10-01), Unno et al.
patent: 5259418 (1993-11-01), Hamrick
patent: 5261462 (1993-11-01), Wolfe et al.
patent: 5275209 (1994-01-01), Sugier et al.
patent: 5284185 (1994-02-01), Kanao
patent: 5316047 (1994-05-01), Kanao
patent: 5385174 (1995-01-01), Kanao
patent: 5406984 (1995-04-01), Sugier et al.
patent: 5553976 (1996-09-01), Korsgaard
Chen Bin
Kalman Mark D.
Brinson Patrick F.
Wellstream, Inc.
LandOfFree
Flexible conduit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flexible conduit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flexible conduit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2282480