Filter system, filter, and method

US11311824B2 · kind B2 · utility

Assignee

• MANN+HUMMEL GmbH · DE

Inventors

• Jochen Linhart · Waiblingen, DE
• Mahesh Srinivas · Bengaluru, IN

Key dates

• Filing date: Feb 13, 2020
• Grant date: Apr 26, 2022
• Expiry date: Jul 9, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01M2011/031
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A filter system for liquid has a filter head with drainage channel and stop element. A filter cartridge is mounted by screw-in movement at the filter head and has a support ring rotatably fastened to its housing part. The support ring has an eccentric closure element and a first positioning element guided toward the stop element by the screw-in movement to position the support ring at the filter head in a rotational position for axially aligning closure element and drainage channel. The closure element is transferred axially into a sealing seat at the filter head to close the drainage channel when screwing on the filter cartridge. The support ring has a second positioning element holding the support ring in a rotationally fixed position at the filter head when unscrewing the filter cartridge so that the closure element is moved out of the sealing seat only in an axial direction.