Filter apparatus with ejection arrangement

Patent metadata

Field	Value
Publication number	US-11235268-B2
Application number	US-201715854548-A
Country	US
Kind code	B2
Filing date	Dec 26, 2017
Priority date	Jan 27, 2012
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A filter cartridge including catches for ejecting the filter cartridge from a filter housing as the filter cartridge and filter housing are removed from a filter base is provided. The catches are configured to engage corresponding catches of the filter base to limit axial motion of the filter cartridge as the filter cartridge and filter housing are threadedly removed from the filter base.

First claim

What is claimed is:

1. A filter cartridge comprising:
a tubular ring of filter media defining a central axis;
a first end cap attached to a first end of the filter media;
a filter cartridge abutment catch including an axially extending leg portion and a head portion extending radially from the leg portion, the radially extending head portion defining an abutment surface axially facing towards the filter media, the filter cartridge abutment catch extends about the central axis between first and second sides, the head portion being positioned between the first and second sides;
a first seal carried by the first end cap proximate a radially outer rim of the first end cap and being positioned radially outward beyond the filter cartridge abutment catch, the first seal being axially offset from the tubular ring of filter media; and
a second seal carried by the first end cap, the second seal being positioned radially inward of the filter cartridge abutment catch, the second seal being axially offset from the tubular ring of filter media, the second seal providing a radially directed sealing surface, the radially directed sealing surface defining a circular periphery.

2. The filter cartridge of claim 1 , wherein the filter cartridge abutment catch is part of the first end cap, the leg portion extending axially outward from a body portion of the first end cap and away from the filter media, the head portion extending radially over a portion of the body portion and forming an undercut region therebetween.

3. The filter cartridge of claim 1 , wherein:
the head portion has an axially tapered end face that faces generally axially away from the filter media and that tapers in the radial direction relative to the central axis;
the axially tapered end face also faces radially outward and away from a center of the filter cartridge.

4. The filter cartridge of claim 1 , wherein
the head portion has an axially tapered end face that faces generally axially away from the filter media and that tapers in the radial direction relative to the central axis;
the axially tapered end face also faces radially inward and toward a center of the filter cartridge.

5. The filter cartridge of claim 1 , further comprising a central hub, the central hub carrying the second seal for sealing with a filter base; the filter cartridge abutment catch being radially positioned between the first and second seals.

6. The filter cartridge of claim 1 , wherein the tubular ring of filter media defines an inner surface that bounds a central cavity, the filter cartridge abutment catch is positioned axially offset from the tubular ring of filter media and is external of the central cavity of the tubular ring of filter media.

7. The filter cartridge of claim 1 , wherein the tubular ring of filter media defines an inner surface that bounds a central cavity, the filter cartridge abutment catch is positioned radially outward beyond the inner surface.

8. The filter cartridge of claim 1 , wherein:
the tubular ring of filter media defines a radially outer surface;
the radially outward directed seal defining a radially outward directed sealing surface, the radially outward directed sealing surface being positioned radially outward further than the radially outer surface of the tubular ring of filter media.

9. The filter cartridge of claim 1 , wherein the filter cartridge abutment catch is part of the first end cap, the leg portion extending axially outward from a body portion of the first end cap and away from the filter media, the head portion extending radially over a portion of the body portion and forming an undercut region therebetween.

10. The filter cartridge of claim 1 , wherein the first end cap has a central aperture in fluid communication with a central cavity of the tubular ring of filter media.

Assignees

• Baldwin Filters Inc

Inventors

• Beard John H
• Schweitzer Stephen

Classifications

• B01D35/30 Primary

  Filter housing constructions · CPC title

• B01D2201/295

  with projections extending in a radial outward direction, e.g. for use as a guide, spacing means · CPC title

• B01D2201/4015

  Bayonet connecting means · CPC title

• B01D2201/291

  End caps · CPC title

• B01D29/96

  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