Expansion membrane assembly and filter head in exhaust fluid filter assembly

Patent metadata

Field	Value
Publication number	US-11857901-B2
Application number	US-202117563552-A
Country	US
Kind code	B2
Filing date	Dec 28, 2021
Priority date	Jul 1, 2019
Publication date	Jan 2, 2024
Grant date	Jan 2, 2024

Abstract

A filter assembly comprises a housing, a filter element for filtering a fluid and positionable within the housing, and an expansion membrane assembly. The expansion membrane assembly fluidly separates and is positionable between the housing and the filter element. The membrane assembly extends along an inner surface, a top surface, and an outer surface of the housing.

First claim

What is claimed is:

1. A filter assembly comprising:
a housing comprising a housing inner surface, a housing outwardly facing peripheral surface substantially radially opposite the housing inner surface, and a housing top surface extending between the housing inner surface and the housing outwardly facing peripheral surface, the housing outwardly facing peripheral surface being an outermost exterior surface of the housing;
a filter element for filtering a fluid and positioned within the housing; and
an expansion membrane assembly that fluidly separates and is positioned between the housing and the filter element, the expansion membrane assembly extending along the housing inner surface, the housing top surface, and the housing outwardly facing peripheral surface of the housing, the expansion membrane assembly outwardly expandable within the housing towards the housing inner surface and a gap is defined between a portion of an outer surface of the expansion membrane assembly and a portion of the housing inner surface with the filter element radially spaced apart from an inner surface of the expansion membrane assembly.

2. The filter assembly of claim 1 , wherein the expansion membrane assembly forms a seal with the housing inner surface and the housing top surface.

3. The filter assembly of claim 1 , wherein the expansion membrane assembly comprises a membrane body and a lip, the membrane body positioned between the housing inner surface and the filter element and the lip extending along the housing outwardly facing peripheral surface.

4. The filter assembly of claim 3 , wherein the membrane body comprises a membrane side wall and a membrane bottom wall that together define an inner area of the membrane body for receiving the filter element, the membrane body comprising an extension extending radially outwardly from a top portion of the membrane side wall.

5. The filter assembly of claim 4 , wherein the extension of the membrane body extends along and directly abuts the housing top surface.

6. The filter assembly of claim 4 , wherein the lip is positioned radially outwardly relative to the membrane side wall and extends axially downwardly toward the membrane bottom wall from the extension.

7. A filter assembly comprising:
a housing;
a filter element for filtering a fluid and positioned within the housing; and
an expansion membrane assembly that fluidly separates and is positioned between the housing and the filter element, the expansion membrane assembly extending along a housing inner surface, a housing top surface, and a housing outer surface of the housing,
the expansion membrane assembly comprising a membrane body and a lip, the membrane body positioned between the housing inner surface and the filter element and the lip extending along the housing outer surface,
the membrane body comprising a membrane side wall and a membrane bottom wall that together define an inner area of the membrane body for receiving the filter element, the membrane body comprising an extension extending radially outwardly from a top portion of the membrane side wall,
wherein one of the extension of the membrane body and the housing top surface comprises at least one projection, and the other of the extension of the membrane body and the housing top surface defines at least one notch that is complementary to the at least one projection,
wherein the at least one projection fits within the at least one notch such that the expansion membrane assembly and the housing are rotationally locked together.

8. A filter assembly comprising:
a housing;
a filter element for filtering a fluid and positioned within the housing;
an expansion membrane assembly that fluidly separates and is positioned between the housing and the filter element, the expansion membrane assembly extending along a housing inner surface, a housing top surface, and a housing outer surface of the housing, the expansion membrane assembly outwardly expandable within the housing towards the housing inner surface, wherein and a gap is defined between a portion of an outer surface of the expansion membrane assembly and a portion of the housing inner surface, the expansion membrane assembly comprising a membrane body and a lip, the membrane body positioned between the housing inner surface and the filter element and the lip extending along the housing outer surface; and
a filter head, the filter head forming an inner seal with and extending along an inner surface of the membrane body and extending along the housing outer surface.

9. The filter assembly of claim 8 , wherein the filter head extends along an outer surface of the lip of the expansion membrane assembly.

10. The filter assembly of claim 8 , wherein the filter head comprises an inner extension forming the inner seal with the inner surface of the membrane body and an outer extension extending along the housing outer surface,
wherein the inner extension and the outer extension of the filter head define a slot, wherein at least a portion of the expansion membrane assembly and at least a portion of the housing are positioned within the slot.

11. The filter assembly of claim 10 , wherein the membrane body comprises an extension positioned axially between the housing top surface and a slot surface of the filter head, the slot surface positioned radially between the inner extension and the outer extension of the filter head.

12. The filter assembly of claim 11 , wherein the extension comprises a top surface and a bottom surface that are opposite each other,
wherein the top surface of the extension forms a top seal with the slot surface of the filter head, and the bottom surface of the extension forms a bottom seal with the housing top surface such that the top seal and the bottom seal are directly opposite each other through the extension.

13. The filter assembly of claim 10 , wherein an outer surface of the membrane body forms an outer seal with the housing inner surface, wherein the inner seal and the outer seal are directly opposite each other through the membrane body.

14. A filter assembly comprising:
a housing;
a filter element for filtering a fluid and positioned within the housing; and
an expansion membrane assembly that fluidly separates and is positioned between the housing and the filter element, the expansion membrane assembly extending along a housing inner surface, a housing top surface, and a housing outer surface of the housing,
the expansion membrane assembly comprising a membrane body and a lip, the membrane body positioned between the housing inner surface and the filter element and the lip extending along the housing outer surface,
wherein the membrane body comprises a membrane side wall, a membrane bottom wall, and a plurality of ribs along an outer surface of the membrane body, the plurality of ribs extending axially along the membrane side wall and radially along the membrane bottom wall.

15. A method of assembling a filter assembly comprising:
positioning an expansion membrane assembly at least partially in a housing such that the expansion membrane assembly extends along a housing inner surface, a housing top surface, and a housing outwardly facing peripheral surface of the housing, the housing outwardly facing peripheral surface being an outermost exterior surface of the housing and being substantially opposite the housing inner surface, the expansion membrane assembly outwardly expandable within the housing towards the housing inner surface and a gap is defined between a portion of an outer surface of the expansion membrane assembly and a portion of the housing inner surface; and
positioning

Assignees

• Cummins Filtration Ip Inc

Inventors

• Onkarappa Bharath Siddaramanna
• Pokharkar Mrinmayee Balasaheb
• Nagare Nilesh Bhaskar
• Shah Nilay
• Holm Christopher E
• Becker Frank Wolfgang
• Choudhary Santoshini

Classifications

• B01D35/30 Primary

  Filter housing constructions · CPC title

• B01D29/0093

  Making filtering elements not provided for elsewhere · CPC title

• B01D29/15

  arranged for inward flow filtration · CPC title

• B01D2201/304

  Seals or gaskets · CPC title

• B01D2201/4053

  using keys · CPC title