Patent · US Expired

Liquid filter

US7390407B2 · kind B2 · utility

39Cited by

4References

18Claims

0Family size

Assignee

MANN+HUMMEL GmbH · DE

Inventors

Martin Weindorf · Kornwestheim, DE
Markus Kolczyk · Schwäbisch Gmünd, DE
Ralf Blum · Ludwigsburg, DE

Key dates

Filing date	Dec 6, 2005
Grant date	Jun 24, 2008
Priority date	—
Expiry date	Mar 28, 2026

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2201/4084
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A liquid filter, in particular for the lubricating oil of an internal combustion engine, having a housing with an inlet and an outlet formed from a housing pot having a substantially downwardly open filter element installation opening and a screw-on cover that closes the installation opening, and a filter element arranged in the housing, sealingly separating the inlet from the outlet. The screw-on cover has a drain for residual liquid present in the housing with a round drain opening arranged in the central axis of the housing. A device for opening and closing the drain opening is arranged in the area of the drain and connected to an end disk of the filter element so that it moves relative to the drain opening and opens the drain when the cover is unscrewed.

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