Pipe joint
US6705648B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 1999 |
| Grant date | Mar 16, 2004 |
| Priority date | — |
| Expiry date | Aug 3, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L15/002
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe joint comprising: a pin having a tapered male screw section formed on an outer circumferential face of an end of a pipe; a box having a tapered female screw section, which can be screwed to the tapered male screw section, formed on an inner circumferential face of an end of a pipe, wherein the tapered male screw section is screwed into the tapered female screw section, a top face of a male thread ridge of the tapered male screw section and a top face of a female thread ridge of the tapered female screw section have a predetermined width like a square screw thread, trapezoidal screw thread and buttress screw thread, and top faces of both thread ridges are inclined in a direction opposite to a tapered face of screw threads with respect to a face parallel to the pipe axis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.