Temporary or permanent blocking of the bore of a pipe
US4911193A · kind A · utility
5Cited by
12References
28Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1988 |
| Grant date | Mar 27, 1990 |
| Priority date | — |
| Expiry date | Jul 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/6123
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method is provided for temporarily or permanently blocking the bore of a gas service pipe 5. In the method a resilient ball 6 is forced along the pipe 5 from the gas meter tap end of the pipe 5 by gas pressure, the ball 6 forming a force fit sufficient to resist any attempt to dislodge it by the pressure of gas in the pipe 5. The ball 6 is forced to a position where it is outside the gas consumer's premises 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.