Valve test plug
US4926704A · kind A · utility
12Cited by
6References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 10, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Apr 10, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K15/147
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A valve test plug for connection with a pressure vessel. The plug includes a hollow valve body and a resilient valve core. The valve core includes first and second core portions bonded in end-to-end relationship and has a slit extending therethrough. The first core portion is exposed directly to the pressure and is softer than the second core portion which engages the valve body to close the slit or to seal on the probe when the probe is extending through the slit. The softer first core portion maintains a seal with the valve body and urges the second core portion into sealing engagement with the valve body end to close the slit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.