Diaphragm valve
US4671490A · kind A · utility
44Cited by
23References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1986 |
| Grant date | Jun 9, 1987 |
| Priority date | — |
| Expiry date | May 16, 2006 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K41/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A diaphragm valve which uses a multiple annular metal diaphragm welded about its inner periphery to a valve operating stem. The diaphragm is sealingly clamped about its outer periphery to the valve body and is also clamped about its inner periphery at a location spaced outwardly of the weld to prevent the weld from being subjected to flexure stresses during valve actuation. The actuating assembly is arranged to produce non-rotary, reciprocatory movement of the operating stem through a bonnet mounted rotary actuator. An improved stem tip seal arrangement is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.