Inertial valve
US4178952A · kind A · utility
1Cited by
2References
9Claims
0Family size
Inventors
Key dates
| Filing date | Oct 20, 1977 |
| Grant date | Dec 18, 1979 |
| Priority date | — |
| Expiry date | Oct 20, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/0753
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An inertial trip valve actuated by vibration to close gas lines and the like in the event of earthquake for safety. Said valve is provided with an external reset. Said reset cannot be used to defeat the operation of the device by tying the reset handle because the reset action momentarily closes the valve. The valve comprises an inlet flapper valve and an outlet shear valve. Said flapper valve is closed under a spring load when an inertial trigger is tripped. Said flapper valve may be reset by an external handle which closes a shear valve during the reset operation thus preventing the defeat of the trigger operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.