Valve with an integral orifice
US6871803B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 5, 2000 |
| Grant date | Mar 29, 2005 |
| Priority date | — |
| Expiry date | Dec 30, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W76/50
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve with an integral orifice for use in gas feeding equipment provided with a pressure-type flow volume control device to be employed for manufacturing of semi-conductors and chemical goods. The valve with an integral orifice has the excellent flow rate control characteristics by improving the processing accuracy of the orifice and preventing the distortion of the orifice at the time of assembling. The orifice is formed in a stainless steel made orifice disc. The metal-made orifice disc with the orifice formed by separate processing and the synthetic-resin-made valve seat body are removably assembled, wherein the orifice disc and the synthetic resin made valve seat body are fixed airtight to the valve main body by pressing the valve seat body via a metal inner disc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.