Relief valve
US4246930A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 1979 |
| Grant date | Jan 27, 1981 |
| Priority date | — |
| Expiry date | Mar 8, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8122
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A relief valve, particularly adapted for use on racing car tires, which pops open to relieve at a set pressure and then reseats at a pressure slightly lower than the opening pressure. The valve includes a diaphragm (28) a diaphragm retaining plate (36) which has a resilient sealing element (39) molded or otherwise attached to it, a valve seat attached to the center of the diaphragm, and a compression spring (26) acting on the diaphragm to bias the valve seat against the resilient sealing element. When the valve pops open against the spring force, the area above the diaphragm is exposed to a venting pressure, via a port formed through the valve seat and through the diaphragm, which is higher than atmospheric and thus adds to the spring force, resulting in a resealing pressure which is slightly less than the opening pressure. In a second embodiment, a stem member (161) extends through the valve seat (130) and the diaphragm (128) and through the diaphragm retaining member (136) to provide means to pressurize the container to be relieved through an external source, by means of a valve core (175) received within the stem.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.