Dispensing container for minimizing liquid content's exposure to air
US5433346A · kind A · utility
Inventor
Key dates
| Filing date | Jan 18, 1994 |
| Grant date | Jul 18, 1995 |
| Priority date | — |
| Expiry date | Jan 18, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D77/06
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A container and a valve located thereon from which liquid substances can be dispensed wherein the container has inner and outer wall portions, one within the other, and a liquid substance positioned within one of the wall portions but not within the other wall portion. The valve has a first port communicating with the space within the one wall portion and a second port communicating with the space within the other wall portion, and a valve operator member movable between a first position simultaneously closing the first and second ports and a second position simultaneously opening the first and second ports. The valve directs incoming replacement air into one portion of the container as liquid is dispensed out from the other portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.