Filtering element

Patent metadata

Field	Value
Publication number	US-10307699-B2
Application number	US-201113809849-A
Country	US
Kind code	B2
Filing date	Jul 8, 2011
Priority date	Jul 14, 2010
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A filtering element for filtering devices, comprising a filtering material (5) which defines a filtering space and is intended for the filtration of fluids, and at least one water indicator (13, 19, 23) which is provided at a location coming into contact with fluid during the filtration mode and indicates the presence of water in the fluid in a visually recognizable manner, is characterized in that the at least one water indicator (13, 19, 23) is provided on an end cap (7, 9) for mounting at one end of the filtering material (5), and/or is at least partially part of the end cap (7, 9), and/or is provided on a fluid-permeable supporting structure (21) surrounding the filtering material (5), and/or is at least partially part of the supporting structure (21).

First claim

What is claimed is:

1. A filtering element for filtering devices comprising:
a cylindrical filtering material for the filtration of fluids defining an internal filtering cavity within the filtering material;
a top and a bottom end cap as terminal encasements of said filtering material; and
at least one water indicator which displays the presence of water in the fluid in a visually recognizable manner, wherein

said at least one water indicator is provided on an outside of the filtering element and on an outside of one of said top and bottom end caps at a location coming into contact with fluid during filtration mode.

2. The filtering element according to claim 1 , wherein said filtering element forms a removable filtering cartridge.

3. The filtering element according to claim 1 , wherein the at least one water indicator is attached to one of said top and bottom end cap and is in the form of a test strip comprising copper sulfate.

4. The filtering element according to claim 1 , wherein the filtering space defined by the filtering material is formed as a filtering cavity and/or is cylindrical.

5. The filtering element according to claim 1 , wherein at least one of said end caps forms a circular encasement.

6. The filtering element according to claim 1 , wherein the at least one water indicator signals the presence of water by changing color.

7. The filtering element according to claim 6 , wherein the at least one water indicator irreversibly changes color in the presence of water.

8. The filtering element according to claim 1 , wherein at least a substantial portion of said filtering space is provided with said filtering material.

9. The filtering element according to claim 1 , wherein said top and bottom end caps are arranged on opposite sides of said filtering space along a longitudinal axis of said filtering element.

10. The filtering element according to claim 1 , wherein a fluid-permeable supporting structure is provided, that forms an outer encasement of said filtering material.

11. The filtering element according to claim 10 , wherein said fluid-permeable supporting structure is arranged coaxially with said filtering material along a longitudinal axis of said filtering element.

12. The filtering element according to claim 10 , wherein said fluid-permeable supporting structure extends along a longitudinal axis of said filtering element from said top end cap to said bottom end cap.

13. The filtering element according to claim 1 , wherein the at least one water indicator is arranged so that the water indicator is visually observable, at least when the filtering element is removed from the filtering device.

14. A filtering element for filtering devices comprising:
a cylindrical filtering material for the filtration of fluids defining an internal filtering cavity within the filtering material;
a top and a bottom end cap as terminal encasements of said filtering material; and
at least one water indicator which displays the presence of water in the fluid in a visually recognizable manner, wherein

said at least one water indicator is provided on an outside of the filtering element and on one of said top and bottom end caps at a location coming into contact with fluid during filtration mode; and
said at least one water indicator is in the form of a test strip.

Assignees

• Koch Edwin
• Schwender Matthias
• Schmitz Andreas
• Hydac Filtertechnik Gmbh

Inventors

• Koch Edwin
• Schwender Matthias
• Schmitz Andreas

Classifications

• B01D27/101

  Filter condition indicators · CPC title

• B01D2201/291

  End caps · CPC title

• B01D2201/0407

  Perforated supports on both sides of the filtering element · CPC title

• B01D35/143 Primary

  Filter condition indicators · CPC title

• G01N21/81

  Indicating humidity · CPC title