Valve
US4262698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 26, 1979 |
| Grant date | Apr 21, 1981 |
| Priority date | — |
| Expiry date | Dec 26, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86895
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An improvement is provided in a valve having a valve housing defining first and second valve openings and a valve sealing element in the housing. The improvement comprises a three-piece valve sealing element. That valve sealing element comprises a first hard retainer of metal or the like, a second generally cup shaped hard retainer of metal or the like and a resilient plastic component disposed between the first and second retainers and having an exposed sloped peripheral sealing surface which surface is adapted to engage the first valve opening defined within the valve housing. The second retainer has a curved peripheral surface engageable with the second valve opening within the valve housing, the two valve openings being spaced longitudinally from each other. The valve includes a valve stem connected to the valve sealing element for movement of said valve sealing element in the housing between the two valve openings. The valve openings are generally circular as are the plastic sealing component and the second retainer. Preferably the plastic sealing element comprises polyurethane and the two retainers comprise steel or stainless steel or the like. The valve stem is disposed long…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.