Dispensing valve with trampoline-like construction
US4991745A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 9, 1990 |
| Grant date | Feb 12, 1991 |
| Priority date | — |
| Expiry date | Jan 9, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7881
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-sealing valve is provided for fluid dispensing packages and the like, of the type which are compressed and decompressed to dispense therefrom liquids, pastes, powders and other similar flowable materials. The valve has a marginal groove extending along one face thereof in a closed pattern to define a central area inside the groove, and an outer area outside the groove. Ribs extend between the center and outer areas of the valve to bridge the groove, and selectively support the center valve area in a trampoline-like fashion. A slit extends through the center valve area, and into at least a portion of the groove to form an orifice that shifts between outwardly open, closed, and inwardly open positions in response to compressing and decompressing the container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.