The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 13, 1986
Filed:
Oct. 05, 1983
Applicant:
Inventors:
Charles A Bollfrass, Houston, TX (US);
Kenneth D Chelette, Katy, TX (US);
Assignee:
Thread Technology International, Inc., Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285187 ; 2853323 ; 285333 ; 2853344 ; 285355 ; 285350 ; 277 26 ;
Abstract
In the preferred embodiment, this invention provides a threaded pipe coupling for connection with a conventional threaded pipe end so as to effect improved sealing against internal fluid pressure and against external fluid pressure as may be required in an oil or gas well. The coupling form causes the thread contact pressure to be greater at the maximum and minimum thread contact diameters than exists at intermediate points along the length of thread contact. An auxiliary plastic seal that will undergo thermal cycling is also provided.