Filter having a filter cartridge, and corresponding filter cartridge

Patent metadata

Field	Value
Publication number	US-9573087-B2
Application number	US-201213636144-A
Country	US
Kind code	B2
Filing date	Sep 20, 2012
Priority date	Mar 30, 2012
Publication date	Feb 21, 2017
Grant date	Feb 21, 2017

Abstract

A filter assembly includes a filter body, a removable filter cartridge, and a bypass valve with incinerable and non-incinerable portions. The bypass valve includes a valve seat and a movable valve closure element removable with the removable filter cartridge and incinerable. The bypass valve includes a return member remaining in the filter body. A method is provided for controlling bypass valve-opening threshold pressure.

First claim

What is claimed is:

1. Filter assembly for filtering at least one fluid comprising:
a filter body,
a tube within the filter body,
a detachable filter cartridge housed in the filter body and comprising:
a first flange and a second flange,
a filtering medium having a tubular cavity to surround the tube and extending between the first and the second flanges, the first flange comprising a valve seat crossed by at least one orifice communicating with the tubular cavity, and
a valve closure element fixedly joined to the first flange so as to cooperate with the valve seat, the valve closure element being configured to occupy at least two positions, namely a closing position in which the closure element closes off the valve seat and at least one opening position in which the valve closure element enables the passage of fluid through the valve seat,

a return member distinct from the detachable filter cartridge, configured to act by biasing the valve closure element into the closed position,
wherein the valve closure element includes a closing-off surface that contacts the valve seat when the valve closure element is in the closing position;
wherein an area for fixedly joining the valve closure element to the first flange abuts the closing-off surface,
wherein the tube has an unattached end having an opening at least partially formed by an edge, the edge extending diametrically towards an interior of the tube so as to retain the return member at a first end abutting the edge, and
wherein the valve closure element includes a contact surface opposite the closing-off surface, the contact surface contacting the edge of the tube when in the at least one opening position.

2. Filter assembly according to claim 1 , wherein the first flange comprises an aperture within which the valve closure element is retained while at the same time being mobile in translation between a position corresponding to the closing position and a position corresponding to the at least one opening position of the valve closure element.

3. Filter assembly according to claim 2 , wherein the aperture is demarcated by a tubular portion and wherein the area for fixedly joining the valve closure element to the first flange includes a protruding element that comprises a plurality of tabs that abuts an inner shoulder of the tubular portion in a maximum opening position.

4. Filter assembly according to claim 2 , wherein the aperture is distinct from said at least one orifice passing through the valve seat and through which the fluid can pass in the at least opening position of the valve closure element.

5. Filter assembly according to claim 1 , wherein the valve closure element comprises a skirt having the closing-off surface.

6. Filter assembly according to claim 1 , wherein the tube is at least partially hollow and wherein the return member is mounted in the tube.

7. Filter assembly according to claim 1 , wherein the return member comprises a spring.

8. Filter assembly according to claim 7 , wherein the edge comprises ends of upward extensions formed by a plurality of rods, and wherein an internal surface of the tube enables the return member to be held within the tube at a second end of the return member.

9. Filter assembly according to claim 1 , wherein the tube comprises, in an unattached end part, a housing configured to house and hold the return member.

10. Filter assembly according to claim 1 , wherein the valve closure element comprises an area of cooperation with the return member, comprising a surface for supporting the return member and/or an area for guiding the return member.

11. Filter assembly according to claim 1 , wherein the filtering medium is chosen from the group constituted by: cellulose, felt, a woven or non-woven, and synthetic or non-synthetic porous material.

12. Filter assembly according to claim 1 , wherein the valve closure element comprises a polymer material.

13. A filter assembly comprising:
a filter body;
a tube within the filter body, the tube having an end having an opening at least partially formed by an edge extending diametrically towards an interior of the tube;
a removable filter cartridge detachably housed in said filter body and defining a clean zone and a dirty zone, wherein fluid to be filtered flows through said removable filter cartridge from said dirty zone to said clean zone;
a bypass valve having an open condition passing fluid flow therethrough from said dirty zone unfiltered to said clean zone, and a closed condition blocking fluid flow therethrough from said dirty zone to said clean zone;
said bypass valve having both an incinerable portion and a non-incinerable portion;
said incinerable portion having a valve seat and a movable closure valve element having a closing-off surface that contacts the valve seat when the bypass valve is in the closed condition, wherein an area for fixedly joining the movable closure valve element to the removable filter cartridge abuts the closing-off surface;
said incinerable portion being part of said removable filter cartridge and removable therewith upon removal of said removable filter cartridge from said filter body;
said non-incinerable portion being part of said filter body and remaining in said filter body upon removal of said removable filter cartridge from said filter body;
the movable closure valve element having a contact surface opposite the closing-off surface, wherein the contact surface contacts the edge of the tube when in the open condition.

14. A filter assembly comprising:
a filter body;
a tube within the filter body, the tube having an unattached end having an opening at least partially formed by an edge extending diametrically towards an interior of the tube;
a removable filter cartridge detachably housed in said filter body and defining a clean zone and a dirty zone, wherein fluid to be filtered flows through said removable filter cartridge from said dirty zone to said clean zone;
a bypass valve having an open condition passing fluid flow therethrough from said dirty zone unfiltered to said clean zone, and a closed condition blocking fluid flow therethrough from said dirty zone to said clean zone;
said bypass valve having a first portion mounted to said removable filter cartridge and removable therewith upon removal of said removable filter cartridge from said filter body;
said bypass valve having a second portion mounted to said filter body and remaining in said filter body upon removal of said removable filter cartridge from said filter body; and
said first portion having a valve seat and a movable closure valve element having a closing-off surface that contacts the valve seat when the bypass valve is in the closed condition, wherein an area for fixedly joining the movable closure valve element to the removable filter cartridge abuts the closing-off surface;
the movable closure valve element having a contact surface opposite the closing-off surface, wherein the contact surface contacts the edge of the tube when in the open condition.

15. The filter assembly according to claim 14 wherein said first portion of said bypass valve is incinerable, and said second portion of said bypass valve is non-incinerable.

16. A filter assembly comprising:
a filter body;
a tube within the filter body, the tube having an unattached end having an opening at least partially formed by an edge extending diametrically towards an interior of the tube;
a removable filter cartridge detachably housed in said filter body and defining a clean zone and a dirty zone, wherein fluid to be filtered flows through said removable filter cartridge

Assignees

• Cummins Filtration Ip Inc

Inventors

• Malgorn Gerard
• Bagci Ismail

Classifications

• B01D2201/316

  Standpipes · CPC title

• B01D2201/0415

  Details of supporting structures · CPC title

• B01D35/147 Primary

  Bypass or safety valves · CPC title

• B01D2201/305

  Snap, latch or clip connecting means · CPC title

• B01D2201/295

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