Liquid dispensing head, in particular for a bottle for packaging a liquid to be dispensed drop by drop
US9487339B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 6, 2013 |
| Grant date | Nov 8, 2016 |
| Priority date | — |
| Expiry date | Aug 6, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61J1/2086
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
The invention concerns a liquid dispenser head which is designed to be mounted on a bottle containing a liquid and comprises a filtering device (26) forming an interface between the inside and the outside of the bottle. The filtering device comprises tubular filters (30) which are extended longitudinally so they can be plunged into the bottle, particularly tubular filters whose wall consists of a membrane that is selectively permeable to a liquid to be expelled from the bottle and made of hydrophilic material for this purpose. So that the expelled liquid can be replaced by air, the membrane forming the wall of said filter tube is made of hydrophobic material so as to be selectively air-permeable. The hydrophobic membrane also filters bacteria in the air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.