Check/relief valve for an inflatable packer system
US4316504A · kind A · utility
12Cited by
7References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 11, 1980 |
| Grant date | Feb 23, 1982 |
| Priority date | — |
| Expiry date | Feb 11, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7929
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A check/relief valve intended for use in an inflatable packer system. The valve comprises a hollow cylindrical longitudinally extending inner member surrounded by a spring loaded relief piston and a spring loaded check valve poppet, all surrounded by a hollow longitudinally extending outer member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.