Slow opening cylinder valve
US4211386A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1979 |
| Grant date | Jul 8, 1980 |
| Priority date | — |
| Expiry date | Mar 28, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K1/34
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A valve for controlling the flow of gases from high pressure cylinders is provided having a projected raised annular valve seat surrounding a gas passage, a stem in threaded relation to the valve body whereby rotation of the valve stem in the valve body moves the valve stem toward and away from the valve seat, a circumferential shroud extending from the end of the valve stem and surrounding the valve seat when the valve is closed and partially open, a resilient seal member positioned within the recess on the end of the valve stem formed by the shroud, said resilient seat member having a tapered projection which extends into the gas inlet passage when the valve is in closed position and provides a gas tight seal between the valve stem and the valve seat.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.