Combined metal and plastic diaphragm assembly for a valve
US5402983A · kind A · utility
9Cited by
22References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 15, 1994 |
| Grant date | Apr 4, 1995 |
| Priority date | — |
| Expiry date | Feb 15, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/125
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A sealing assembly for a valve with a rotary actuating shaft includes a top seal formed of a plastic diaphragm and a metal diaphragm, both of which are in sealing relationship with the actuating shaft. The metal diaphragm has a cantilever supported lip that is spring fitted into resiliently biased relationship with the actuating shaft. The sealing surface of the metal diaphragm provides a fire-tested seal in the event that the seal of the plastic seal is destroyed by fire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.