Container closure provided with automatic opening-closing mechanism
US4785978A · kind A · utility
48Cited by
1References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1988 |
| Grant date | Nov 22, 1988 |
| Priority date | — |
| Expiry date | Feb 23, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/1644
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A closure for containers comprises an automatic opening-closing mechanism and an outside closure member having a pour opening. The automatic opening-closing mechanism includes a plug member having a centrally formed air introduction hole and a plurality of liquid discharge ports formed around the air introduction hole, a first valve member for opening and closing the liquid discharge ports and a second valve member for opening and closing the air introduction hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.