Dosing and dispensing device
US5000353A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1989 |
| Grant date | Mar 19, 1991 |
| Priority date | — |
| Expiry date | Dec 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/263
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
This container is a unique self-dosing and dispensing container. Through the use of a one-piece, self-aligning valve which moves from one position of closing a dispensing opening to a position of opening the dispensing opening and simultaneously closing the opening between the container and the chamber which contains the dispensing opening. The valve is operated by a change in pressure within the container. The change in pressure in the container is induced by flowing an excess of fluide from the container so as to cause a negative pressure. There are various techniques for creating a negative pressure in the container, including the use of a bellows built into the container and a squeezing of the sidewalls of the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.