Cartridge filter system

• US 20050247617A1
• Filed: 05/05/2004
• Published: 11/10/2005
• Est. Priority Date: 05/05/2004
• Status: Active Grant

• Current Assignee: Harmsco, Inc.
• Original Assignee: Harmsco, Inc.
• Inventors: Seville, Eric D., Harms, Harold H.
• Granted Patent: US 7,138,054 B2
• Time in Patent Office: Days
• US Class Current: 210/314
• CPC Class Codes: B01D 2201/0415 Details of supporting structures
• CPC Class Codes: B01D 29/21 with corrugated, folded or wound sheets
• CPC Class Codes: B01D 29/925 containing liquid displacement elements or cores
• CPC Class Codes: B01D 29/96 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 Class Codes: B01D 35/147 Bypass or safety valves

Abstract

A fluid filter system including a cartridge filter housed in a tank having a standpipe extending from a bottom surface of the tank. The cartridge filter is positioned in the tank with the standpipe extending into an outlet tube in the filter. Fluids flow into the tank, through the filter, and out through the standpipe. The cartridge filter may include a seal in an upper portion of the filter for sealing the cartridge filter to the standpipe in a position that is above the contaminant laden fluids and debris that collect at the bottom of a tank during removal of a cartridge filter.

Claims

1. A cartridge filter, comprising:

at least one filter media having a bottom surface and a top surface generally opposite the bottom surface;

an outlet tube extending from the bottom surface into the filter toward the top surface; and

at least one seal positioned in the outlet tube in closer proximity to the top surface than to the bottom surface for sealing the outlet tube to a standpipe of a fluid filter tank.

2. The cartridge filter of claim 1, wherein the at least one seal comprises at least one o-ring coupled to the outlet tube.

3. The cartridge filter of claim 2, wherein the at least one o-ring is positioned in a recess in a surface of the outlet tube.

4. The cartridge filter of claim 2, wherein the at least one o-ring comprises two o-rings.

5. The cartridge filter of claim 1, further comprising a fluid collection tube between the top surface and the outlet tube for collecting fluids having passed through the filter media.

6. The cartridge filter of claim 5, wherein the fluid collection tube includes at least one aperture for receiving fluids having passed through the filter media, wherein the at least one aperture has a cross-sectional area that is greater than a cross-sectional area of a standpipe of the outlet tube to which the cartridge filter is configured to be attached.

7. The cartridge filter of claim 1, wherein the at least one filter media is generally cylindrical and formed from at least three types of material.

8. The cartridge filter of claim 7, wherein the at least one filter media is formed from at least three concentric filter media.

9. A fluid filter system, comprising:

a tank having an opening for receiving a cartridge filter;

a cover attached to the tank sealing the opening;

a standpipe extending from a bottom surface of the tank towards the cover; and

a cartridge filter contained in the inner cavity of the tank, comprising;

at least one filter media having a bottom surface and a top surface generally opposite the bottom surface;

an outlet tube extending from the bottom surface into the filter toward the top surface; and

at least one seal positioned in the outlet tube in closer proximity to the top surface than to the bottom surface and in contact with the standpipe of a fluid filter tank.

10. The fluid filter system of claim 9, wherein the at least one seal comprises at least one o-ring coupled to the outlet tube.

11. The fluid filter system of claim 10, wherein the at least one o-ring is positioned in a recess in a surface of the outlet tube.

12. The fluid filter system of claim 10, wherein the at least one o-ring comprises two o-rings.

13. The fluid filter system of claim 9, further comprising a fluid collection tube between the top surface and the outlet tube for collecting fluids having passed through the filter media.

14. The fluid filter system of claim 13, wherein the fluid collection tube includes at least one aperture for receiving fluids having passed through the filter media, wherein the at least one aperture has a cross-sectional area that is greater than a cross-sectional area of a standpipe of an outlet tube to which the cartridge filter is configured to be attached.

15. The fluid filter system of claim 9, wherein the at least one filter media is generally cylindrical and formed from at least three types of material.

16. The fluid filter system of claim 15, wherein the at least one filter media is formed from at least three concentric filter media.

17. The fluid filter system of claim 9, wherein a continuous gap exists between an inside cover of the cover and the top surface of the cartridge filter.

18. The fluid filter system of claim 9, wherein the tank comprises a cartridge receiving region containing at least one cartridge filter and a ultraviolet treatment region having at least one ultraviolet light source for exposing filter fluids to ultraviolet light.

19. The fluid filter system of claim 18, further comprising at least one baffle positioned proximate to an inlet of the system and at least one baffle positioned proximate to an outlet of the system.