Oil filter for the cleaning of lubricating oil

US5516425A · kind A · utility

Assignee

• Mahle GmbH · DE

Inventors

• Thomas Brieden · Waiblingen, DE
• Rolf Mohle · Bretzfeld, DE
• Hubert Muller · Grevenbroich, DE
• Dietmar Sonntag · Waiblingen, DE

Key dates

• Filing date: Jun 30, 1995
• Grant date: May 14, 1996
• Expiry date: Jun 30, 2015

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2001/1064
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An oil filter has a cap screwed to the approximately upright arranged filter housing of the oil filter for the cleaning of lubricating oil, with a ring-shaped filter insert being detachably fastened on the cap and separating the outer inflow space from the inner flow-off space. In the lower zone of the filter housing, provision is made for a valve-like acting member, which is automatically opened with each change of the filter insert and serves for discharging oil that remained in the filter housing into an oil-collecting space via a discharge duct. A center bar is rotatably connected with the cap. The center bar is axially displaceable in a limited way and has in its zone close to the cap a piston-like flange, which is sealed against the filter insert and separates the inflow space from the flow-off space. The center bar has, in its lower end zone, the valve-like acting member cooperating with the discharge duct.