Valve
US4535968A · kind A · utility
5Cited by
6References
34Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1983 |
| Grant date | Aug 20, 1985 |
| Priority date | — |
| Expiry date | Nov 16, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/1896
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A ball type valve in which the ball is rotated by the cooperation of multiple tracks and multiple track followers. Also, a pressure operated permanent lock-out is disclosed. Pressure applied to a piston withdraws an expander from under a lock ring to release a lock-out sleeve. Continued application of pressure drives the sleeve to valve lock-open position where the sleeve is permanently locked to the housing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.