Pipe coupling
US4951710A · kind A · utility
3Cited by
3References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 6, 1989 |
| Grant date | Aug 28, 1990 |
| Priority date | — |
| Expiry date | Sep 6, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87957
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pipe coupling comprising a cylindrical body having a fluid passage and a valve for opening and closing the fluid passage, in which the valve has a head portion and a cylinder portion, both made of chemicals-resistant polymers, and the cylinder portion has a plurality of holes penetrating the cylinder wall in the diametrical directions, the holes being formed alternately in the positions shifted in the circumferential direction and the axial direction of the cylinder portion, resulting in that the cylinder portion has elasticity in the axial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.