Filter, hollow filter element, and filter housing of a filter, and seal of a hollow filter element

Patent metadata

Field	Value
Publication number	US-10105629-B2
Application number	US-201514934749-A
Country	US
Kind code	B2
Filing date	Nov 6, 2015
Priority date	Nov 6, 2014
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A filter (10) for filtering fluid, in particular air, water, fuel, oil, or urea-water solution, in particular of an internal combustion engine, in particular of a motor vehicle, a multiple-bellows hollow filter element (44), a filter housing (30) of a filter (10), and a seal (90) of a hollow filter element (44) are described. The filter (10) comprises at least one filter housing (30), which comprises at least one inlet (28) for fluid to be filtered and at least one outlet (36) for filtered fluid. At least one hollow filter element, in particular a multiple-bellows hollow filter element (44) can be arranged in the at least one filter housing (30) such that it separates the at least one inlet (28) from the at least one outlet (36). The at least one filter housing (30) comprises at least one first housing part (42) having at least one installation opening (40) for the at least one hollow filter element (44), which can be closed using at least one second housing part (38). The at least one hollow filter element (44) comprises at least one filter bellows (46, 48), which comprises at least one filter medium (50), through which flow can occur for filtering of the fluid. The at least one filter bellows (46, 48) at least partially delimits at least one element interior (60, 64). An element axis (32) of the at least one hollow filter element (44) extends coaxially, axially, or in parallel in relation to an installation/removal axis of the at least one hollow filter element (44), in relation to which the hollow filter element (44) can be installed in the filter housing (30) and removed from the filter housing (30) through the at least one installation opening (40) in parallel, axially, or coaxially.

First claim

What is claimed is:

1. A filter for filtering fluid, including:
a filter housing having
at least one inlet for fluid to be filtered; and
at least one outlet for filtered fluid;

wherein the filter housing is configured to receive at least one multiple-bellows hollow filter element such that it separates the at least one inlet from the at least one outlet;
wherein the filter housing comprises:
at least one first housing part having at least one installation opening through which the at least one multiple-bellows hollow filter element is received into the filter housing;
at least one second housing part closing the installation opening;
a housing sealing step surface extending circumferentially on an interior of the filter housing, the housing sealing step surface having:
a first housing sealing surface step extending circumferentially; and
a second housing sealing surface step extending circumferentially and connected to the first housing sealing surface step, the second housing sealing surface step arranged radially outwardly from the first housing surface step providing a step configuration of the circumferential housing sealing step surface; and

wherein each of the at least one multiple-bellows hollow filter element comprises:
a plurality of filter bellows nested radially, one inside another, relative to an element axis, and secured together to form a unitary filter element;
wherein each of the plurality of filter bellows comprises
at least one filter medium through which flow occurs for filtering the fluid;
wherein the plurality of filter bellows at least partially delimits at least one element interior of the at least one multiple-bellows hollow filter element;
a double radial seal of an elastomer material fixed onto a first axial end of the multiple-bellows hollow filter element, the double radial seal having:
a first seal bulge projecting in an axial direction outwards from the first axial end to free seal end edge at an axial outer end of the double radial seal, the first seal bulge configured to seal radially against the first housing sealing surface step of a filter housing sealing step surface at the interior of the of the filter housing;
a second seal bulge projecting radially outwardly beyond the first seal bulge and projecting radially outwardly beyond a radially outer side of the filter medium of the multiple-bellows hollow filter element, the second seal bulge configured to seal radially against the second housing sealing surface step of the filter housing sealing step surface;

wherein an element axis of the at least one multiple-bellows hollow filter element extends coaxially, axially, or in parallel to an installation/removal axis of the at least one multiple-bellows hollow filter element, in relation to which the at least one multiple-bellows hollow filter element is installed through the at least one installation opening into the filter housing and removed from the filter housing in parallel, axially, or coaxially.

2. The filter according to claim 1 , wherein
the at least one second housing part, at least in the final mounting state of the filter, exerts a force acting at least axially in relation to the element axis onto the at least one multiple-bellows hollow filter element.

3. The filter according to claim 2 , wherein
the force from the at least one second housing part engages onto at least one support nub and/or at least one support frame and/or at least one end body and/or at least one seal of the at least one multiple-bellows hollow filter element.

4. The filter according to claim 1 , wherein
the at least one multiple-bellows hollow filter element comprises at least one spacer element in the form of at least one support nub and/or at least one support web.

5. The filter according to claim 1 , wherein
the at least one multiple-bellows hollow filter element comprises at least one end body on an axial end side with respect to the element axis.

6. The filter according to claim 1 , wherein
the filter comprises at least one secondary filter element arranged proximate to the first axial end of the multiple-bellows hollow filter element;
wherein the double radial seal radially surrounds the at least one secondary filter element.

7. A multiple-bellows hollow filter element, of a filter for filtering fluid according to claim 1 , including:
a plurality of filter bellows, nested radially one inside the another and secured together to form a unitary filter element;
wherein each of the plurality of filter bellows comprises:
at least one filter medium through which flow occurs for filtering the fluid;
wherein the plurality of filter bellows at least partially delimits at least one element interior of the at least one multiple-bellows hollow filter element;
a double radial seal of an elastomer material fixed onto a first axial end of the multiple-bellows hollow filter element, the double radial seal having:
a first seal bulge projecting in an axial direction outwards from the first axial end to free seal end edge at an axial outer end of the double radial seal, the first seal bulge configured to seal radially against a first housing sealing surface step of a filter housing sealing step surface;
a second seal bulge projecting radially outwardly beyond the first seal bulge and projecting radially outwardly beyond a radially outer side of the filter medium of the plurality of filter bellows, the second seal bulge configured to seal radially against a second housing sealing surface step of the filter housing sealing step surface;

wherein an element axis of the at least one multiple-bellows hollow filter element extends coaxially, axially, or in parallel to an installation/removal axis of the at least one multiple-bellows hollow filter element, in relation to which the at least one multiple-bellows hollow filter element is installed through an installation opening into the filter housing and removed from the filter housing in parallel, axially, or coaxially.

Assignees

• Mann & Hummel Gmbh

Inventors

• Schulz Franziska

Classifications

• B01D46/521

  using folded, pleated material · CPC title

• B01D2271/027

  Radial sealings · CPC title

• B01D46/10

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

• B01D2275/208

  Oval shape · CPC title

• B01D46/2411 Primary

  Filter cartridges · CPC title