Oil filtration method and element of wound cotton/paper composition
US5552065A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1995 |
| Grant date | Sep 3, 1996 |
| Priority date | — |
| Expiry date | Jan 10, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2239/0695
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of filtering internal combustion and industrial engine oil includes providing a specially wound filter element in a canister and passing the liquid through it slowly (e.g., 1-2 quarts per minute). The filter element includes a length of cotton/cellulose paper composition yard wound on a core in an irregular winding pattern such that some layers filter smaller (e.g., 1 micron) particles and others further from the core filter larger (e.g., 5 micron) particles. A filter element constructed according to the invention includes a core having a hollow interior, a perforated outer surface in fluid communication with the hollow interior, an open first end in fluid communication with the hollow interior, and a closed second end. A length of yarn of cotton and cellulose paper composition is wound in a series of layers over the outer surface of the core in the irregular winding pattern such that some layers closer the core filter particles down to a smaller size than do other layers further from the core. A layer of filter material is provided between the winding and the outer surface of the core to trap any paper and cotton particles breaking free from the yarn.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.