Relief valve
US4721129A · kind A · utility
4Cited by
6References
16Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1987 |
| Grant date | Jan 26, 1988 |
| Priority date | — |
| Expiry date | Jun 29, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7925
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A relief valve for relieving pressure in a system and sealing the same from incoming rain or other moisture or foreign material after relief of pressure. The valve has a spring biased piston which operates internally of the valve to relieve pressure, then reseal in an air-tight manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.