Filtration filter and filtration device

Patent metadata

Field	Value
Publication number	US-12440785-B2
Application number	US-202016933321-A
Country	US
Kind code	B2
Filing date	Jul 20, 2020
Priority date	Mar 19, 2018
Publication date	Oct 14, 2025
Grant date	Oct 14, 2025

Abstract

A filtration filter that includes a filter section having a plurality of through-holes passing through a first main surface and constructed such that objects to be filtered contained in a liquid are captured and a second main surface opposite the first main surface; and a frame section surrounding an outer periphery of the filter section, wherein a first film thickness at a center of the filter section is larger than a second film thickness of the filter section at a position closer to the frame section than the center of the filter section.

First claim

The invention claimed is:

1. A filtration filter comprising:
a filter section having a plurality of through-holes passing through and directly connecting a first main surface and a second main surface opposite the first main surface of the filter section, the filter section being constructed such that objects to be filtered contained in a liquid are captured; and
a frame section surrounding an outer periphery of the filter section,
wherein the second main surface of the filter section has a flat shape, and
wherein a thickness of the filter section decreases in an order from a central region of the filter section to an intermediate region of the filter section and then followed by a rim side region of the filter section, the rim side region being closest to the frame section relative to the central region and the intermediate region.

2. The filtration filter according to claim 1 , wherein the first filter a thickness at the central region of the filter section is larger than a thickness of the frame section.

3. The filtration filter according to claim 2 , wherein a thickness at the rim side region is larger than the thickness of the frame section.

4. The filtration filter according to claim 1 , wherein a thickness at the rim side region is larger than a thickness of the frame section.

5. The filtration filter according to claim 1 ,
wherein the filter section has a substantially circular shape, and
the frame section has a ring shape surrounding the outer periphery of the filter section.

6. A filtration device comprising: the filtration filter according to claim 1 ; and
a housing defining a flow path for the liquid and holding the filtration filter in the flow path, the housing including:
a first housing section defining a first flow path facing the first main surface of the filter section of the filtration filter; and
a second housing section defining a second flow path facing the second main surface of the filter section of the filtration filter, and
the first housing section is configured to fit with the second housing section with the frame section of the filtration filter interposed between the first housing section and the second housing section such that the frame section is sandwiched in a thickness direction and held by the first housing section and the second housing section in a state where the filtration filter continuously extends in a direction from the filter section toward the frame section.

7. The filtration device according to claim 6 ,
wherein the first housing section has a protruding portion that protrudes in a direction from the first housing section toward the second housing section on a side thereof fitted to the second housing section,
the second housing section has a recessed portion that is recessed in the direction from the first housing section toward the second housing section on a side thereof fitted to the first housing section, and
the protruding portion fits to the recessed portion such that the frame section of the filtration filter is sandwiched therebetween in the thickness direction.

8. The filtration device of claim 6 , further comprising a flange portion that extends outward from a sidewall of the second housing section.

9. The filtration device of claim 6 , further comprising a flange portion that extends outward from a sidewall of the first housing section.

10. The filtration device according to claim 6 , wherein the second housing section has a handle.

11. A filtration filter comprising:
a filter section having a plurality of through-holes passing through and directly connecting a first main surface and a second main surface opposite the first main surface of the filter section, the filter section being constructed such that objects to be filtered contained in a liquid are captured; and
a frame section surrounding an outer periphery of the filter section,
wherein the filter section has a convex shape protruding out from a side of the first main surface,
wherein a thickness of the filter section decreases in an order from a central region of the filter section to an intermediate region of the filter section and then followed by a rim side region of the filter section, the rim side region being closest to the frame section relative to the central region and the intermediate region, and
wherein a first depth of a first through-hole of the plurality of through-holes in the central region of the filter section is larger than a second depth of a second through-hole of the plurality of through-holes in the rim side region of the filter section.

12. The filtration filter according to claim 11 ,
wherein the filter section has a substantially circular shape, and
the frame section has a ring shape surrounding the outer periphery of the filter section.

13. A filtration device comprising:
the filtration filter according to claim 11 ; and
a housing defining a flow path for the liquid and holding the filtration filter in the flow path, the housing including:
a first housing section defining a first flow path facing the first main surface of the filter section of the filtration filter; and
a second housing section defining a second flow path facing the second main surface of the filter section of the filtration filter, and
the first housing section is configured to fit with the second housing section with the frame section of the filtration filter interposed between the first housing section and the second housing section such that the frame section is sandwiched in a thickness direction and held by the first housing section and the second housing section in a state where the filtration filter continuously extends in a direction from the filter section toward the frame section.

14. The filtration device according to claim 13 ,
wherein the first housing section has a protruding portion that protrudes in a direction from the first housing section toward the second housing section on a side thereof fitted to the second housing section,
the second housing section has a recessed portion that is recessed in the direction from the first housing section toward the second housing section on a side thereof fitted to the first housing section, and
the protruding portion fits to the recessed portion such that the frame section of the filtration filter is sandwiched therebetween in the thickness direction.

15. The filtration device of claim 13 , further comprising a flange portion that extends outward from a sidewall of the second housing section.

16. The filtration device of claim 13 , further comprising a flange portion that extends outward from a sidewall of the first housing section.

17. The filtration device according to claim 13 , wherein the second housing section has a handle.

18. The filtration filter according to claim 1 , wherein the thickness of the filter section decreases continuously in the order from the central region of the filter section to the intermediate region of the filter section and then followed by the rim side region of the filter section.

19. The filtration device according to claim 11 , wherein the thickness of the filter section decreases continuously in the order from the central region of the filter section to the intermediate region of the filter section and then followed by the rim side region of the filter section.

Assignees

• Murata Manufacturing Co

Inventors

• Yokota Shusuke
• Banju Masaru
• Kawaguchi Toshikazu
• Kondo Takashi

Classifications

• B01D29/014

  with curved filtering elements (construction B01D29/035, B01D29/071) · CPC title

• B01D29/0097

  Curved filtering elements, e.g. concave filtering elements · CPC title

• B01D29/01

  with flat filtering elements (B01D29/39 takes precedence) · CPC title

• B01D29/0095

  Flat filtering elements (B01D25/12, B01D25/26 take precedence) · CPC title

• B01D2275/202

  Disc-shaped filter elements · CPC title