Dispensing closure with controlled valve actuation
US5842618A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 30, 1995 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | Mar 30, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/2031
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
Self-sealing membrane valves can be used with containers where storage between uses is in an upright orientation if the product in the container on the underside of the membrane valve is drained from the membrane valve. This will prevent product droplets from being expelled from the valve as it rapidly opens. In addition, it is useful to have a structure on the exterior of the membrane valve to control the rate of opening of the valve during the dispensing operation. The membrane valve is drained on the underside by use of a plurality of appendages that are adjacent the underside of the valve and by the use of a diaphragm adjacent the upper side of the valve to control the rate of opening of the valve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.