Seismic shut-off valve
US4565208A · kind A · utility
14Cited by
1References
23Claims
0Family size
Inventors
Key dates
| Filing date | May 4, 1984 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | May 4, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0753
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
In a seismic actuated shut-off valve, a valve seat is placed between, and in communication with an inlet and outlet. A circular track is located above the valve seat and a plurality of balls ride in the track. A specifically shaped obstruction on the track causes a ball to leave the track at a predetermined seismic level, the ball falling onto the valve seat to shut off the gas flow through the valve. A reset rod can be extended through the valve seat in order to push the ball off of the valve seat and back onto the track in order to reopen the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.