Self-closing powder cap
US5950881A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1998 |
| Grant date | Sep 14, 1999 |
| Priority date | — |
| Expiry date | Jun 10, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/268
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-closing cap comprising a base having one or more holes and a lid movably mounted about the base. The lid has one or more holes, and is capable of occupying a first open position and a second closed position. In the first open position, the holes of the base align with the holes of the lid. In the second closed position, the holes of the base do not align with the holes of the lid. A spring means is provided between the base and the lid in order to automatically place the lid in the closed position. Further, the underside of the lid is provided with one or more protrusions which seal the holes of the base when the lid is in the closed position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.