Hollow filter element and filter device for filtering air

Patent metadata

Field	Value
Publication number	US-11400403-B2
Application number	US-201816500062-A
Country	US
Kind code	B2
Filing date	Apr 10, 2018
Priority date	Apr 12, 2017
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A hollow filter element for inserting into a filter device for filtering air, in particular of an internal combustion engine of a motor vehicle, includes a filter material which is held on the end face by a planar surround in a sealed manner. The planar surround has at least one grip recess for handling the hollow filter element. A filter device having such a hollow filter element includes a housing having a housing base part and a housing cover. The housing cover has at least one pin which, upon correct installation of the hollow filter element in the housing base part and when the housing cover is placed on the housing base part, projects into the grip recess of the planar surround.

First claim

The invention claimed is:

1. A hollow filter element for interchangeably inserting into a filter device for filtering air, comprising:
a filter material which is disposed around a cavity; and
a planar surround enclosing the cavity, wherein the filter material is sealingly held on an end face thereof by the planar surround;
wherein the planar surround has a grip recess for handling the hollow filter element,
wherein the grip recess is arranged in the planar surround,
wherein the grip recess is arranged outside of a cross section of the cavity, and
wherein the grip recess is an inherently rigid insertion part.

2. The hollow filter element according to claim 1 , wherein the planar surround has a plurality of grip recesses.

3. The hollow filter element according to claim 2 , wherein the planar surround is point-symmetrical with respect to a center on a central axis and wherein the plurality of grip recesses are disposed asymmetrically in the planar surround based on a 180° rotation of the hollow filter element about the central axis.

4. The hollow filter element according to claim 1 , wherein the grip recess is undercut.

5. A filter device, comprising:
the hollow filter element according to claim 1 ; and
a housing which includes:
a housing base part which has an air outlet; and
a housing cover which has an air inlet and which is placeable on the housing base part;

wherein the hollow filter element is disposable in the housing such that the hollow filter element separates the air inlet from the air outlet;
wherein the housing cover has a pin which, when the hollow filter element is correctly installed in the housing base part and the housing cover is placed on the housing base part, projects into the grip recess of the planar surround.

6. The filter device according to claim 5 , wherein the pin has a length such that pressure is exertable on the grip recess by the pin.

Assignees

• Daimler Ag

Inventors

• Meffert Thomas
• Nawroth Ralf Thomas

Classifications

• F02M35/0201

  Housings; Casings; Frame constructions; Lids; Manufacturing or assembling thereof · CPC title

• B01D2265/026

  with means for avoiding false mounting · CPC title

• F02M35/02483

  Cylindrical, conical, oval, spherical or the like filter elements; wounded filter elements · CPC title

• B01D46/4227 Primary

  Manipulating filters or filter elements, e.g. handles or extracting tools · CPC title

• B01D46/0005

  Mounting of filtering elements within casings, housings or frames (B01D46/2422 takes precedence) · CPC title