Half-turn valve
US4597560A · kind A · utility
1Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 23, 1985 |
| Grant date | Jul 1, 1986 |
| Priority date | — |
| Expiry date | Sep 23, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K5/00
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A plug valve assembly employs a stem having a threaded end, and a shiftable locking key to alternatively interengage the plug with either the stem or the bonnet. When the plug is locked to the bonnet by the key, the threaded part of the shaft will initially lift it from its seat; shifting the key will permit the plug to be rotated by the shaft to open the valve, and the interengagement established by the key will enable return of the plug to orient it for closure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.