Disposable dispenser pump for products in liquid or paste form
US4776495A · kind A · utility
109Cited by
2References
2Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 1, 1987 |
| Grant date | Oct 11, 1988 |
| Priority date | — |
| Expiry date | Apr 1, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/1209
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A dispenser pump and cartridge forming a single unit which can be discarded after use includes a hollow pump body with an admission valve having flexible lips which separate at the time of use under the action of a pressure gradient established within the product to be dispensed. The pump body also has a delivery valve with a flexible tubular skirt which is inwardly deformable and capable of moving locally away from an annular sealing lip, thus permitting downward escape of a dose of product. Subsequent re-closing of the skirt prevents any upward admission of external air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.