Self sealing product delivery system
US5197638A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 30, 1991 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Oct 30, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7836
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A nozzle for dispensing a product while perserving the sterility of the product remaining in storage incorporates a mechanism which combines a flexible static seal and a valve. The valve moves as the static seal is deflected to open an orifice allowing the stored product to be expelled into the air. The seal is deflected sufficiently to open the valve only when the pressure behind the seal is great enough to force flow from the product container to the atmosphere. If the pressure in the sterile container is lower than the ambient pressure, which would permit a flow of air and microbiological contaminants into the container, then the static seal, with the help of a spring, is deflected to force the valve to close.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.