Liquid purifying device
US4940542A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Oct 27, 1989 |
| Grant date | Jul 10, 1990 |
| Priority date | — |
| Expiry date | Oct 27, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/48
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A device for dispensing a liquid, including a container having an interior space accommodating the liquid, a first valve attached to the container, a delivery path having one end submerged in the liquid and extending through the container such that the other end is outside the container, and a second valve disposed in the delivery path for closing and opening the delivery path. The first valve permits a pressurized gas to flow therethrough into the container to raise the pressure within the container, but inhibits a discharge flow of the pressurized gas and the liquid therethrough out of the interior space. The liquid is delivered out of the container through the delivery path, due to the raised pressure within the interior space. The device has a micro-porous membrane filter disposed in a portion of the delivery path which is located upstream of the second valve, as viewed in the direction of delivery of the liquid. The micro-porous membrane filter removes microorganisms from the liquid delivered from the delivery path.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.