Staged oil filter incorporating timed release oil conditioner
US6623636B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 2002 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Aug 30, 2022 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01M2001/1014
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An oil-conditioning filter, for use with an internal combustion engine, includes a mechanically active filter element and a chemically active filter element. The chemically active filter element has a beneficial oil conditioning agent contained in a plurality of porous additive-dispensing modules. Each of the additive-dispensing modules includes a hollow housing having a plurality of holes formed therein, and a beneficial oil additive disposed within the housing. Optionally, each additive-dispensing module may also include a porous or semi-porous polymeric membrane covering the housing, to control the rate at which the additive material diffuses outwardly therefrom.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.