Pipe joint
US9488300B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 10, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Dec 10, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L37/0842
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An annular sealing material seals a pipe joint between a socket and a spigot. The sealing material includes a bulb part which is composed of a first bulb, a second bulb located closer to the inner side of the socket than the first bulb, and a narrow part present between the first and second bulbs. The first bulb is pressed against the inner circumferential surface of the socket. The second bulb is pressed against the outer peripheral surface of the spigot. The second bulb is inclined towards the pipe center from the first bulb in a natural state before it is provided between the socket and the spigot. The inner diameter of the second bulb is smaller than the outer diameter of the spigot in the natural state. The second bulb is extensible in the pipe diameter direction due to elastic deformation of the narrow part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.