Sieve filter for fluid conduits, especially for hydraulic pressure lines in internal combustion engines

US6613221B2 · kind B2 · utility

Assignee

• Ina Schaeffler KG · DE

Inventors

• Eduard Golovatai-Schmidt · Hemhofen, DE
• Frank Lauterbach
• Rainer Ottersbach · Bonn, DE

Key dates

• Filing date: Dec 18, 2001
• Grant date: Sep 2, 2003
• Expiry date: Dec 18, 2021

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D35/147
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A sieve filter for fluid lines, especially for hydraulic pressure lines (2) in internal combustion engines which is formed of a hollow cylindrical main body (3) with a fluid inlet (4) and a fluid outlet (5), and of a fine mesh filter element (6) for through flow by fluid which has a bypass function when the filter element (6) is stopped up or filtering highly viscous fluid. The sieve filter (1) is biased by a spring element (7), and is insertable together with the spring element (7), between two axially spaced opposing surfaces (8, 9) inside the pressure line (2) such that its fluid inlet (4) and the spring element (7) are prestressed against the opposing surfaces (8, 9), whereby the main body (3) of the sieve filter (1) closes a bypass fluid channel passing the filter element (6) which is clearable through an axial displacement of the main body (3) against the force of the spring element (7) resulting from the rise of fluid pressure on the filter element.