Gas flow control regulator
US5307834A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1993 |
| Grant date | May 3, 1994 |
| Priority date | — |
| Expiry date | Aug 2, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7808
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In a combined gas flow control regulator and pressure relief valve, the pressure relief valve includes a pressure relief member comprising a flange and a sleeve which is sealingly engaged with the piston rod of the gas flow control regulator and is slidable relative to the piston rod. A spring urges the flange of the pressure relief member into contact with the piston head of the gas flow control regulator thereby closing a gas relief aperture in the piston head capable of connecting a first chamber, which is one chamber of the gas flow control regulator to a second chamber which is a gas relief chamber from which gas can escape to atmosphere. The pressure relief member moves as one with the piston of the gas flow control regulator in normal operation of the gas flow control regulator, and the pressure relief member moves away from the piston head against the action of the spring, independently of the motion of the piston, when excess pressure builds up within the regulator body, to allow this excess pressure to be vented to atmosphere through the second chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.