Pump and receptacle fitted therewith
US7503466B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2004 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | May 20, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0039
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pump for fixing on a receptacle includes: a stationary portion including a pump body; a moving assembly movable relative to the pump body and co-operating therewith to define a variable-volume pump chamber; an opening in the pump body that enables the pump chamber to communicate with the inside of the receptacle and enables the pump to operate in a head-down position; an air intake passage, distinct from the opening, between the stationary portion and the moving assembly; a first lip configured to press in a leaktight manner against the pump body and to prevent communication via the opening between the inside of the receptacle and the pump chamber; and a second lip arranged, at least when the moving assembly is in an end-of-stroke position, to prevent communication through the inside of the pump body and via the opening between the inside of the receptacle and the outside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.