Dispenser having air tight spout
US7886941B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2005 |
| Grant date | Feb 15, 2011 |
| Priority date | — |
| Expiry date | May 14, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1001
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A spout valve assembly, for a pump dispenser including a discharge head, is located within an opening in the discharge head for permitting outletting of liquid product and includes a spout valve retained within the discharge head opening by a retainer. The spout valve includes a slit at a first end thereof and an orifice at a second opposite end thereof. The slit includes slit lips directly engageable with and disengageable from each other to respectively define slit closed and opened configurations. The spout valve is made of a material for permitting opening of the slit under pressure from the liquid product for thereby allowing the liquid product to be discharged out through the slit when in the slit opened configuration, and for otherwise permitting closing of the slit to prevent the liquid product from being discharged through the slit when in the slit closed configuration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.