Filter device and fixing means comprising a filter device of this type

Patent metadata

Field	Value
Publication number	US-2020353400-A1
Application number	US-201816641783-A
Country	US
Kind code	A1
Filing date	Aug 7, 2018
Priority date	Sep 1, 2017
Publication date	Nov 12, 2020
Grant date	—

Abstract

A filter for use at an airflow opening of bellows of a shock absorber. The filter device includes a filter body through which a gas, in particular air, can flow in in the direction of an air inflow direction and out in the direction of an air outflow direction. The airflow opening is a joint air inlet and air outlet opening. A fastening means is disclosed that is fitted with a filter, in particular a fastening ring fitted therewith, for fastening bellows to a shock absorber.

First claim

1 .- 13 . (canceled)

14 . A filter device for use at an airflow opening of bellows of a shock absorber, the filter comprising:
a filter body configured to fit to an airflow opening of a bellows and configured to permit a gas to enter in the direction of an air inflow direction and exit in the direction of an air outflow direction, and wherein the airflow opening is a joint air inlet and air outlet opening.

15 . The filter device of claim 14 , comprising an excess pressure relief mechanism.

16 . The filter device of claim 15 wherein the pressure relief mechanism includes a non-return function.

17 . The filter device of claim 14 wherein the filter body is produced from a flexible, preferably mat-like material exhibiting a restoring force and/or held in a movable filter body frame which is air-permeable in the air inflow and air outflow direction, which filter body frame can be exposed to a restoring force.

18 . The filter device of claim 17 wherein the filter body or the filter body frame can be moved by the restoring force into an inoperative position in which the filter body closes the at least one joint air inlet and air outlet opening in the air inflow direction and also in the air outflow direction in a filtering manner up to a predefined air outflow pressure.

19 . The filter device of claim 17 wherein the filter body or the filter body frame is moved against the restoring force from the inoperative position into a working position during an outflow of air at a pressure higher than the predefined air outflow pressure, in the air outflow direction.

20 . The filter device of claim 19 wherein an opening degree of the working position of the filter body or the filter body frame is limited by a stop.

21 . The filter device of claim 14 wherein the filter body is arranged in a stationary filter body frame element.

22 . The filter device of claim 21 wherein a bypass surrounding the filter body is provided as an excess pressure relief mechanism which comprises a pressure relief closure in the form of a non-return valve which closes the bypass and automatically opens it for pressure relief from a predefined air outflow pressure.

23 . The filter device of claim 14 wherein the filter body is configured as a particle filter and/or as a harmful substance filter.

24 . The filter device of claim 14 wherein the filter body is configured to be self-cleaning.

25 . The filter device of claim 24 wherein the self-cleaning of the filter body takes place through a deformation of the filter body and/or through tapping and/or blowing off when the filter body or the filter body frame moves from the inoperative position into the working position and back or strikes a stop delimiting an opening angle.

26 . The filter device of claim 14 wherein a separate filter body is provided for each airflow opening and/or a joint filter body for one or multiple airflow openings.

27 . A fastening ring, comprising the filter device of claim 14 , the fastening ring configured to fasten bellows to a shock absorber.

Assignees

• Thyssen Krupp Bilstein Gmbh
• Thyssenkrupp Ag

Inventors

• Schmidt Klaus

Classifications

• B01D2275/203

  Shapes flexible in their geometry, e.g. bendable, adjustable to a certain size · CPC title

• B01D46/0087

  Bypass or safety valves · CPC title

• B01D2273/14

  Filters which are moved between two or more positions, e.g. by turning, pushing · CPC title

• B01D46/10 Primary

  Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces · CPC title

• B01D46/0089

  Anti-return means · CPC title