Closure for a cylindrical opening having improved venting means
US4466550A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 28, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Sep 28, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L55/11
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A closure for a cylindrical opening having improved venting means including a plug body for removably positioning within and sealing a cylindrical opening, the body having an axial opening therethrough and having means when the plug is within the cylindrical opening to seal against pressure, a tubular valve element slidably received in the plug body opening, the element having at least one radial opening adjacent to and spaced from its closed inner end, a spring normally biasing the tubular element towards the plug outer end so that the radial opening is sealed by the wall of the plug member axial opening and a push rod for displacing the tubular element inwardly to expose the radial opening to the interior of the plug body to vent fluid pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.