Water shedding device
US4430222A · kind A · utility
Inventor
Key dates
| Filing date | Sep 27, 1982 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | Sep 27, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S210/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
It has long been known that there is an interfacial tension between immiscible liquids such as water in oil. It has long been known that membranes when wetted by one of two immiscible liquids will preferentially allow the passage through the membrane of the liquid with which the membrane is wetted, and will reject the other liquid with an opposing force that is proportional to the interfacial tension of the liquids. The opposing force is inversely proportional to the diameter of the pores of the membrane, and can be several inches of water head for pores a couple thousands of an inch in diameter. According to principles of the present invention, a structure is provided which augments the small water opposing force of the above described phenomenon with opposing forces of other mechanisms to produce a combined force which will separate water, without utilizing dirt collecting and annoying water coalescing filters, such as layers of glass fibers, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.