Oil filter including replaceable primary and secondary flow filter elements

US5698097A · kind A · utility

Assignee

• Knecht Filterwerke GmbH · DE

Inventors

• Hans Gebert · Sankt Augustin, DE
• Rolf Mohle · Bretzfeld, DE
• Dietmar Sonntag · Waiblingen, DE
• Elke Bruss · Asperg, DE
• Dietwart Guntert · Sachsenheim, DE
• Hubert Muller · Grevenbroich, DE

Key dates

• Filing date: Sep 13, 1995
• Grant date: Dec 16, 1997
• Expiry date: Sep 13, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S210/13
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

An oil filter for internal combustion engines is disclosed herein. The filter includes a housing with a bottom arranged below an open top and a screw-on cover threadedly engaged within the open top. The housing includes an inlet duct, a first oil discharge duct in the bottom of the housing, and a second oil discharge duct in the bottom of the housing and coaxially surrounding the first oil discharge duct. A support part is provided within the housing having a first end which is connected to the cover in an axially force-transmitting manner and a second free end inserted into the first oil discharge duct when the cover fully threadedly engaged to the open end of said housing to sealingly close the first discharge duct, and is withdrawn from the discharge duct when the cover is removed from the open end of the housing to enable discharging of oil from the housing via the first oil discharge duct. The support part supports a primary flow filter element in a lower portion of the housing and a secondary flow filter element in an upper portion of the housing and fluidly connects the primary flow filter to the second discharge duct and the secondary flow filter to the first discharge duct…