Buttress thread form

Details Buttress thread form Buttress thread form

1990-04-27

1992-03-03

Reese, Randolph A.

Pipe joints or couplings

Particular interface

Tapered

2853323, 285355, 285390, F16L 1500

Patent

active

050926357

ABSTRACT:
The overall description of this invention is a truncated buttress-type thread form that incorporates a reverse-angle tension load flank with a compression flank and a torque shoulder; the thread does not have any radial interference designed into it, but the hooked tension flank does tend to pull the pin and box together once the torque shoulder is engaged. The mating compression flanks have designed into them a minimum amount of clearance prior to the shouldering action, which then closes to zero or very near zero at the moment the shoulder is engaged. This drawing together is due to the tendency of the hooked threads to pull together at shouldering if there exists no radial interference in the thread body. The thread roots and crests can be tapered, parallel to the taper of the thread body, or flat and parallel to the pipe axis but maintain adequate clearance to allow some closure once the shoulder is engaged so that the compression flanks can draw together.

REFERENCES:
patent: 929027 (1909-07-01), Schuhmann
patent: 1927656 (1933-09-01), Eaton
patent: 1973848 (1934-09-01), Duffy
patent: 2063407 (1936-12-01), Eaton
patent: 2207005 (1940-07-01), Haas
patent: 2532632 (1950-12-01), MacArthur
patent: 2636753 (1953-04-01), Griffin
patent: 2772102 (1956-11-01), Webb
patent: 3050318 (1962-08-01), Van der Wissel
patent: 3079181 (1963-02-01), Van der Wissel
patent: 3109672 (1963-11-01), Franz
patent: 3359013 (1967-12-01), Knox
patent: 3468563 (1969-09-01), Duret
patent: 3508771 (1970-04-01), Duret
patent: 3989284 (1976-11-01), Blose
patent: 4153283 (1979-05-01), Hellmund et al.
patent: 4161332 (1979-07-01), Blose
patent: 4244607 (1981-01-01), Blose
patent: 4373754 (1983-02-01), Bollfrass
patent: 4438953 (1984-03-01), Timme
patent: 4494777 (1985-01-01), Duret
patent: 4521042 (1985-06-01), Blackburn et al.
patent: 4549754 (1985-10-01), Saunders et al.
patent: 4600225 (1986-07-01), Blose
patent: 4647085 (1987-03-01), Anderson
patent: 4703954 (1987-11-01), Ortloff et al.
patent: 4707001 (1987-11-01), Johnson
patent: 4730857 (1988-03-01), Schwind
patent: 4762344 (1988-08-01), Perkins et al.
patent: 4828295 (1989-05-01), Plaquin et al.
patent: 4844510 (1989-07-01), Theiss et al.
patent: 4865364 (1989-09-01), Nobileau

Affiliated with

Also associated with

Rating

Buttress thread form does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-267772