Flow responsive closure device
US4402434A · kind A · utility
Inventor
Key dates
| Filing date | Jan 11, 1982 |
| Grant date | Sep 6, 1983 |
| Priority date | — |
| Expiry date | Jan 11, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/244
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An automatic closure device for containers being openable by pressure on the container and closable when such pressure is released. A cap member having a discharge orifice adapted to be closed by a plug member on a hollow stem is provided. The hollow stem has a discharge port. A diaphragm is positioned on said stem extending out to said cap, and a seal member having an aperture defined therein for receipt of said stem is positioned within said cap forming a pressure chamber between it and the diaphragm. Above the diaphragm which is resilient and movable downwardly by pressure is a discharge chamber. A lock is provided to also lock the plug in an open or in a closed mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.