Filter Element and Filter Assembly

Patent metadata

Field	Value
Publication number	US-2023117933-A1
Application number	US-202218067257-A
Country	US
Kind code	A1
Filing date	Dec 16, 2022
Priority date	Mar 29, 2018
Publication date	Apr 20, 2023
Grant date	—

Abstract

A filter element has a first follower element with a first traction surface and a second follower element with a second traction surface provided for interacting with first and second mating surfaces of the filter housing, respectively. The first and second traction surfaces interact with the first and second mating surfaces to pull out the filter element from the filter housing. The first and second traction surfaces are spaced apart from each other along a longitudinal axis of the filter element and project radially into the interior of the filter element. At least one of the first and second follower elements has a stop surface adjoining circumferentially the respective traction surface. In a position of use, the stop surface interacts with a counter stop surface of the filter housing to form an at least unidirectional rotational degree of freedom blocking about the longitudinal axis relative to the filter housing.

First claim

What is claimed is:

1 . A filter element comprising:
a filter medium body surrounding an interior of the filter element at least partially circumferentially, the filter medium body having a first longitudinal end face and a second longitudinal end face; a first end disk arranged on the first longitudinal end face; wherein axial, as used herein, is a direction parallel to a longitudinal axis (L) arranged within and extending through the interior of the filter element from the first longitudinal end face to the second longitudinal end face; a first follower element connected directly or indirectly to the first end disk and arranged in the interior of the filter element, the first follower element projecting radially inwardly towards the longitudinal axis (L) to a radially inner end, having:
a first traction surface,
wherein the first traction surface is configured to interact with a corresponding first mating surface of a filter housing;
a second follower element connected directly or indirectly to the first end disk and arranged in the interior of the filter element, the second follower element projecting radially inwardly towards the longitudinal axis (L) to a radially inner end, having:
a second traction surface,
wherein the second traction surface is configured to interact with a corresponding second mating surface of the filter housing;
wherein the first and second traction surfaces are configured to interact with the first and second mating surfaces such that the filter element can be pulled out of the filter housing when the first and second traction surfaces interact with the first and second mating surfaces; wherein the first traction surface and the second traction surface each comprise a plane oriented substantially normal to the longitudinal axis, wherein substantially normal, as used herein, is a plane oriented at an angle between 80 to 100 degrees relative to longitudinal axis (L); wherein the first traction surface and the second traction surface are axially spaced apart from each other along the longitudinal axis (L) of the filter element; wherein both the first and the second follower elements are arranged axially nearer to the first longitudinal end face than to the second longitudinal end face; wherein the first follower element and/or the second follower element comprises
a stop surface adjoining circumferentially the respective traction surface of the first follower element and/or the second follower element,
wherein, in a position of use of the filter element, the stop surface is configured to interact with a corresponding counter stop surface of the filter housing to form an at least unidirectionally acting rotational degree of freedom blocking about the longitudinal axis of the filter element relative to the filter housing;
a support tube arranged in the interior of the of the filter element and extending at least over a portion of a distance from the first longitudinal end face to the second longitudinal end face; wherein the follower elements are connected directly or indirectly to the support tube.

2 . The filter element according to claim 1 , wherein
the stop surface is oriented normal to the respective traction surface of the first follower element and/or the second follower element.

3 . The filter element according to claim 1 , wherein
the stop surface projects radially into the interior of the filter element parallel to the longitudinal axis of the filter element.

4 . The filter element according to claim 1 , wherein
the filter element is a round filter element; and the filter medium body is a hollow cylindrical filter medium body.

5 . The filter element according to claim 1 , further comprising
wherein the first follower element comprising
the first traction surface and
the second follower element comprising
the second traction surface are provided at the support tube.

5 . The filter element according to claim 1 , wherein
between the first follower element and the second follower element
a first insertion groove and a second insertion groove are provided.

6 . The filter element according to claim 5 , wherein
the first insertion groove and the second insertion groove have a different width.

7 . The filter element according to claim 5 , wherein
the first insertion groove and the second insertion groove are positioned at an angle different from 180 degrees relative to each other.

8 . The filter element according to claim 6 , wherein
the first insertion groove and the second insertion groove have a different width.

9 . The filter element according to claim 1 , wherein
the support tube is connected directly to the first end disk.

10 . The filter element according to claim 1 , wherein
the support tube and the first end disk form a one-piece collar sleeve section which extends over only a portion of the distance from the first longitudinal end face to the second longitudinal end face.

11 . A filter assembly comprising:
a filter housing comprising the first mating surface and the second mating surface, wherein the first mating surface and the second mating surface are arranged at a distance from each other along a longitudinal axis of the filter housing; the filter element according to claim 1 , wherein the first traction surface is configured to interact with the first mating surface of the filter housing;
wherein the second traction surface is configured to interact with the second mating surface of the filter housing;
wherein the first and second traction surfaces are configured to interact with the first and second mating surfaces such that the filter element can be pulled out of the filter housing when the first and second traction surfaces interact with the first and second mating surfaces;
wherein the first traction surface and the second traction surface project radially into the interior of the filter element;
wherein, in a position of use of the filter element, the stop surface is configured to interact with the corresponding counter stop surface of the filter housing to form an at least unidirectionally acting rotational degree of freedom blocking about the longitudinal axis relative to the filter housing.

12 . The filter assembly according to claim 11 , further comprising
a follower device, wherein the filter housing comprises
a filter housing cover,
wherein the follower device is connected to the filter housing cover,
wherein the follower device comprises
a first follower counter element and
a second follower counter element,
wherein the first follower counter element comprises
the first mating surface, and

wherein the second follower counter element comprises
the second mating surface.

13 . The filter assembly according to claim 12 , wherein
the first follower counter element and the second follower counter element have a different width.

14 . The filter assembly according to claim 12 , wherein
the first follower counter element and the second follower counter element are positioned at an angle different from 180 degrees relative to each other.

15 . The filter assembly according to claim 13 , wherein
the first follower counter element and the second follower counter element are positioned at an angle different from 180 degrees relative to each other.

16 . A filter assembly comprising:
a filter housing comprising a first mating surface and a second mating surface, wherein the first mating surface and the second mating surface are arranged at a distance from each other along a longitudinal axis of the filter

Assignees

• Mann & Hummel Gmbh

Inventors

• Baumann Christoph
• Glueck Oliver
• Jokschas Guenter
• Razgani Idriss
• Talmon-Gros Dietmar
• Weindorf Martin

Classifications

• B01D2201/0415

  Details of supporting structures · CPC title

• B01D29/96 Primary

  in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters (B01D29/09, B01D29/70 take precedence) · CPC title

• B01D2201/305

  Snap, latch or clip connecting means · CPC title

• B01D35/16

  Cleaning-out devices {, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid} · CPC title

• B01D35/153

  Anti-leakage or anti-return valves · CPC title