Liquid filtering device

Patent metadata

Field	Value
Publication number	US-10456716-B2
Application number	US-201414324595-A
Country	US
Kind code	B2
Filing date	Jul 7, 2014
Priority date	Jun 30, 2005
Publication date	Oct 29, 2019
Grant date	Oct 29, 2019

Abstract

A filter arrangement for liquids has a filter housing and a functional carrier arranged inside the filter housing. A cylindrical filter element is inserted axially into the filter housing and defines an unfiltered side and a filtered side inside the filter housing. A non-return diaphragm is secured within the filter housing, wherein the non-return diaphragm is arranged on the functional carrier so as to effect an axial and/or radial sealing action of the unfiltered side relative to the filtered side of the filter arrangement.

First claim

The invention claimed is:

1. A filter arrangement for filtering liquids, the filter arrangement comprising:
a filter housing;
a filter element arranged within the filter housing, the filter element comprising:
a cylindrical filter element of zigzag folded filter media in a cylindrical shape around a central axis, the filter element having an open interior extending axially on the central axis , wherein the zig-zag folded filter media includes:
a first axial end face;
an opposing second axial end face;
a radially inner flow face arranged at and circumferentially surrounding the open interior and the central axis, the radially inner flow face extending between the first and second axial end faces; and
a radially outer flow face arranged at and circumferentially surrounding the radial outer side of the cylindrical shaped filter media and circumferentially surrounding the radially inner flow face, the radially outer flow face extending between the first and second axial end faces;

wherein one of the inner and outer flow faces is an unfiltered flow face through which unfiltered liquid enters the filter element;
wherein a different one of the inner and outer flow faces is an filtered flow face through which filtered liquid leaves the filter element;
a first end plate that is flat and circular, the first end plate lying directly on and closing directly against the zigzag folded filter media across the first axial end face from proximate to the radial inner flow face of the filter media to the radial outer flow face of the filter media, such that the first axial end face of the zigzag folded filter media is in direct contact with and fixed directly onto the first end plate;
wherein a radially innermost edge of the first end plate is arranged on the first axial end face of the filter media of the cylindrical filter element and spaced radially outwardly away from the radial inner flow face of the filter media;
wherein the first end plate is substantially flat and extending radially in a direction substantially perpendicular to the central axis, the first end plate having:
a central opening extending axially through the first end plate and opening into the radially inner flow face at the open central interior of the filter element;
an axial projection formed as an annular wall having a first end positioned on an outer circumference of the central opening and surrounding the central opening, the axial projection having an opposite second axial end arranged axially outwardly away from the first end plate and filter media;
an annular rim formed on a radially outer circumference of the first end plate, the annular rim having:
a radially inner side arranged on the radially outer flow face of the filter media; and
a radially outer side;
wherein the annular rim projects axially from the first end plate in a direction towards the opposing second axial end face of the filter media; and

an annular non-return diaphragm comprised of an elastomer and secured onto the axial projection in such a way that the non-return diaphragm is operable to sealably contact a sealing surface of the filter housing, with the non-return diaphragm elastically deflectable/flexible within predetermined limits in an axial direction of the filter element,
wherein the non-return diaphragm extends radially through openings of the axial projection from a radially outer side to a radially inner side of the annular wall to form a radial seal at the radial inner side of the annular wall,
wherein the radial seal adapted to seal radially against a filter housing component when the filter housing component is received into the axial projection;

wherein the first end plate includes:
a plurality of radial noses formed directly on the radially outer side of the annular rim and projecting radially outwardly away from the annular rim and the filter media, the plurality of radial noses angularly spaced apart on an outer circumference of the annular rim,
the plurality of radial noses configured to project onto and abut axially against respective ones of a plurality of axial stops formed on a radially inner surface of the filter housing,
the radial noses configured to engage into the plurality of axial stops forming an axial stop of the filter element in the filter housing; and

a plurality of axial stops formed on a radially inner surface of the filter housing, the plurality of axial stops angularly spaced apart on the radially inner surface of the filter housing;
wherein the plurality of radial noses project radially outwardly onto and abut axially against respective ones of the plurality of axial stops of the filter housing, the plurality of axial stops defining a predetermined pretension of the non-return diaphragm when the non-return diaphragm is resting against a sealing surface of the filter housing.

2. The filter arrangement according to claim 1 , wherein:
the radial seal formed by the non-return diaphragm, on the radially inner side of said annular wall of said axial projection, includes at least one radially inwardly projecting bulge operable to seal radially against the filter housing component received into the axial projection.

3. The lifter arrangement according to claim 2 , wherein: the radial seal formed by the non-return diaphragm has two radially inwardly projecting bulges, the bulges spaced apart axially on the radially inner side of said annular wall of said axial projection and separated by an annular groove.

Assignees

• Mann & Hummel Gmbh

Inventors

• Kolczyk Markus
• Loos Rainer
• Lucas Daniel
• Epli Sven
• Jainek Herbert
• Blum Ralf
• Kramer Joerg

Classifications

• F02M37/46

  Filters structurally associated with pressure regulators · CPC title

• B01D35/18

  Heating or cooling the filters · CPC title

• B01D35/157

  Flow control valves: Damping or calibrated passages · CPC title

• B01D35/1576

  Calibrated passages · CPC title

• F01M2011/033

  comprising coolers or heat exchangers · CPC title