Patent · US Expired

Filter system for the lubricant of an internal combustion engine

US6126818A · kind A · utility

17Cited by

13References

10Claims

0Family size

Assignee

Filterwerk Mann & Hummel GmbH · DE

Inventors

Rolf Duerrstein · Bietigheim, DE
Goetz Von Esebeck · Berlin, DE
Robert Ostertag · Tiefenbronn, DE
Rene Reif · Esslingen am Neckar, DE
Martin Weindorf · Kornwestheim, DE

Key dates

Filing date	Sep 12, 1997
Grant date	Oct 3, 2000
Priority date	—
Expiry date	Sep 12, 2017

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/2695
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A filter system, in particular for filtering the lubricant of an internal combustion engine, having at least two filter elements (19, 25) which can be connected successively to the oil circuit and a changeover valve (21) which feeds the oil to be cleaned to one of the filter elements, with the valve (21) being operated by the pressure difference between the clean oil side and the raw oil side of a filter element (19, 25, 26).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.