Threaded connection of two metal tubes with high tightening torque
US6412831B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 2000 |
| Grant date | Jul 2, 2002 |
| Priority date | — |
| Expiry date | Jul 11, 2020 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/06
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A threaded connection for two metal pipes which includes a tapered male thread with trapezoidal threads on a male element and a mating female thread on a female element. The thread width of the male and female threads, at the thread crest, is less than the thread width at the thread root. The width of the thread crests is larger than the width of a space between the roots of the mating threads. The male and female elements are screwed to a position located beyond that of the position where two flanks of the male threads come into contact with two flanks of the female threads. Such a connection permits makeup with a very high torque. The threads of one and/or the other of the threads can optionally include a groove opening into the thread crest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.