Pump dispensers
US7461762B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2003 |
| Grant date | Dec 9, 2008 |
| Priority date | — |
| Expiry date | Dec 2, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/0059
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Certain pump dispensers, for example foam dispensers, are specially adapted for inverted use. One feature, especially useful in a foam dispenser having both an air cylinder and a liquid cylinder with respective pistons is an intake conduit arrangement to increase the clearance of liquid from the container. An intermediate shell fits over the upright liquid cylinder body and carries an inlet valve positively urged upwardly to the closed position to prevent leaking. A conduit shell fits over the intermediate shell and creates an intake conduit extending down the side of the liquid cylinder to an intake opening lower down the pump body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.