Balanced retention valve
US5195723A · kind A · utility
7Cited by
4References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1992 |
| Grant date | Mar 23, 1993 |
| Priority date | — |
| Expiry date | May 28, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S251/90
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A retention balanced valve, particularly for great depth oil prospection, has a plunger and a plunger guide displaceable inside a cylindrical valve body which is closed in one extremity. The plunger provides the sealing of lateral openings of the valve body and covers seal rings. When the plunger is displaced by an external actuation force against the force of a spring, it deobstructs the openings and allows the displacement of the plunger guide until a protection nut associated to the plunger guide covers the sealing rings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.