Vent for portable gas tank or the like
US4905863A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 9, 1988 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jun 9, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16K51/00
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An improvement in manually operable vents includes a pair of barbs positioned on the end of a leg attached to a vent screw. A vent body is formed with a retaining well on its underside facing the barbs. A throat is formed in the vent body, opening into a flat upper surface of the retaining well. During assembly, the vent screw is screwed into the vent body, causing the barbs to deflect inwards as they are urged through the throat. Once clear of the throat, the barbs restore to their normal position. The vent screw is then held captive, if removal is attempted, by the barbs wedging against the flat upper surface and a cylindrical side wall of the retaining well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.