Automatic valved filter assembly
US6468435B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 14, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Apr 14, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC02F2307/02
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The valved filter assembly of the present invention utilizes a bi-directional pressure differential valve in fluid communication with a filter body housed within a container, such as a bottle. This unique structure allows the user to dispense filtered fluid from a bottle only when the bottle is inverted and squeezed. Squeezing the bottle causes the pressure to increase on the inside of the bottle thereby causing water to traverse the filter body thus contacting and opening the bi-directional pressure differential valve thereby allowing liquid to exit; however, when no pressure is applied to the bottle the bi-directional pressure differential valve remains in the closed position sealing the bottle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.