Filter element
US6004462A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1996 |
| Grant date | Dec 21, 1999 |
| Priority date | — |
| Expiry date | Jun 27, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/06
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Resin having a susceptibility to electrostatic charge which is opposite in polarity to the susceptibility to electrostatic charge of a filter sheet or member forming a filter element is impregnated into the filter member. For example, when the filter member is composed of polyester of 50-70 weight percentage and glass fiber of 5-25 weight percentage as well as pulp of 15-35 weight percentage, resin composed of phenol resin of 5-20 weight percentage and melamine resin of 80-95 weight percentage is impregnated into the filter member so that the susceptibility to electrostatic charge of the filter member can be neutralized. Thus, static electricity generated by friction between the filter element and fuel flowing therethrough can be controlled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.