Pump for liquid or viscous product
US8875953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 7, 2009 |
| Grant date | Nov 4, 2014 |
| Priority date | — |
| Expiry date | Feb 17, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Pump operable manually or by a utensil held by a user, having an elastically deformable chamber, the inside of which contains a liquid or viscous product, and the outside of which is brought into contact with air at a slit made in this chamber and with a replacement fluid at an opening made on the chamber. The chamber is suited to deforming, by pressing of a user, to create a higher pressure in the product compared to the outside, and to open the slit, allowing a volume of product to escape from it. The chamber is suited to making its deformation elastically disappear, upon cessation of the pressing, to create a lower pressure in the product, in the presence of a flow of replacement fluid through the opening towards the inside, and to close the slit, where the chamber wall is planar in the vicinity of the slit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.