Pipe joints or couplings – With fluid pressure seal
Patent
1993-03-05
1994-11-01
Reese, Randolph A.
Pipe joints or couplings
With fluid pressure seal
285334, 285390, F16L 2500, F16L 3316
Patent
active
053602404
ABSTRACT:
A connection for and a method of connecting the ends of two joints of low modulus, low hardness, low strength plastic pipe. The connection includes a threaded box on one joint and a threaded pin on the other joint. The box has tapered, internal, generally dovetail-shaped threads with stab flanks and load flanks and flat roots and crests that are parallel to the longitudinal axis of the pipe. The pin has tapered, external, generally dovetail-shaped threads with stab flanks and load flanks and flat roots and crests that are parallel to the longitudinal axis of the pipe for mating with the internal threads of the box. The threads increase in width in one direction on the box and in the other direction on the pin. When the connection is made up the roots, crests, and flanks of the threads move into engagement to form seals that resist the flow of fluids between the threads. The roots, crests, and flanks remain in engagement even after the compressive stresses created in the pin and/or the tensile stresses created in the box when the connection is made up is relieved by cold flow and continue to seal against internal pressure by the locking effect of the dovetailed-shaped threads.
REFERENCES:
patent: 3791898 (1974-02-01), Remi
patent: 3989284 (1976-11-01), Blose
patent: 4703959 (1987-11-01), Reeves et al.
patent: 4786090 (1988-11-01), Mott
patent: 4822081 (1989-04-01), Blose
patent: 5015014 (1991-05-01), Sweeney
patent: 5018555 (1991-05-01), Hawerkamp
patent: 5078430 (1992-01-01), St. Onge
patent: 5106130 (1992-04-01), Ellsworth et al.
Chun Shackelford Heather
Hydril Company
Reese Randolph A.
LandOfFree
Method of connecting plastic pipe joints to form a liner for an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method of connecting plastic pipe joints to form a liner for an , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of connecting plastic pipe joints to form a liner for an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1798208