Patent · US Expired

Liquid filter with a cooler

US6558536B2 · kind B2 · utility

11Cited by

6References

8Claims

0Family size

Assignee

Filterwerk Mann & Hummel GmbH · DE

Inventors

Herbert Jainek · Heilbronn, DE
Martin Weindorf · Kornwestheim, DE
Herbert Dreher · Horb, DE

Key dates

Filing date	Dec 21, 2000
Grant date	May 6, 2003
Priority date	—
Expiry date	Jan 17, 2021

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF01M2001/1064
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A liquid filter, especially including an oil filter cartridge (12) which is contained in a pot-shaped or cylindrical housing (10) with threaded cover (11), into which a cooler (13) is preferably installed. An outlet opening (37a) is contained in the oil cooler (13) which facilitates complete emptying of the cooler when the filter is changed. In this way, a complete replacement of the oil can be performed, so that the replaced oil is not contaminated from the outset by residues of the old oil. Thus, service intervals can be lengthened. To prevent a short circuit of the outlet opening (37a) during operation, the opening is closed by a valve stem (33) coupled to the threaded cover (11) and opened by unscrewing the cover.

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