IP Library Granted Patent US 7,243,912
Granted Patent B2
US 7,243,912 · App. 11/065,529 · Granted Jul 17, 2007

Aeration diffuser membrane slitting pattern

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Quick Facts
Patent No.
US 7,243,912
App. No.
11/065,529
Granted
Jul 17, 2007
Kind
B2
Abstract

A diffuser assembly for diffusing a fluid from a fluid source into a medium to aerate the medium. The diffuser assembly including a diffuser body in fluid communication with the fluid source and a membrane connected to the diffuser body. The membrane is circular and includes a slitting pattern divided into a series of similar angular segments. The segments are positioned adjacent each other in a circular arrangement to substantially cover the membrane. Each segment includes a plurality of rows each having a plurality of slits. The slits within the segment are arranged in a parallelogram pattern. A first line extending between adjacent slits in a common row is substantially the same length as a second line extending between adjacent slits in adjacent rows.

Claims (18)

1. A diffuser assembly for diffusing a fluid from a fluid source into a medium to aerate the medium, the diffuser assembly comprising:

a diffuser body in fluid communication with the fluid source; and

a membrane connected to the diffuser body, the membrane being circular and including a slitting pattern divided into a series of similar angular segments positioned adjacent each other in a circular arrangement to substantially cover the membrane, each segment including a plurality of rows each having a plurality of slits, midpoints of the slits within the segment arranged in a parallelogram pattern, wherein a first line extending between the midpoints of adjacent slits in a common row is substantially the same length as a second line extending between the midpoints of adjacent slits in adjacent rows.

2. The diffuser assembly of claim 1 , wherein the length of the first line is equal to the length of the second line.

3. The diffuser assembly of claim 2 , wherein the length of the lines equals about 0.100 inches.

4. The diffuser assembly of claim 1 , wherein the first line and the second line define an included relative acute angle.

5. The diffuser assembly of claim 4 , wherein the angle is between 40 and 80 degrees.

6. The diffuser assembly of claim 4 , wherein the angle is less than 75 degrees.

7. The diffuser assembly of claim 4 , wherein the angle is 60 degrees.

8. The diffuser assembly of claim 7 , wherein the length of the first line is equal to the length of the second line.

9. The diffuser assembly of claim 8 , wherein adjacent rows of the plurality of rows are separated by a distance, the distance between adjacent rows being consistent across the segment.

10. The diffuser assembly of claim 9 , wherein the distance equals 86% of the length of the line between the midpoints of adjacent slits.

11. The diffuser assembly of claim 9 , wherein each row is straight and wherein the rows are parallel to each other.

12. The diffuser assembly of claim 1 , wherein adjacent slits within a row of the plurality of rows are separated by a distance, the distance between adjacent slits being consistent across the row.

13. The diffuser assembly of claim 1 , wherein the slits are curved.

14. The diffuser assembly of claim 13 , wherein the slits within each segment are oriented in the same direction.

15. The diffuser assembly of claim 1 , wherein the series of angular segments includes 8 equally sized segments.

16. The diffuser assembly of claim 1 , wherein each slit includes a slit length, wherein all slits lengths are substantially equal.

Assignments (6)
RELEASE OF SECURITY INTEREST (REEL/FRAME 032126/0487) Recorded Apr 6, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
To: SIEMENS WATER TECHNOLOGIES LLC
Reel/Frame 055845/0245 →
RELEASE OF SECURITY INTEREST (REEL/FRAME 032126/0430) Recorded Apr 6, 2021
From: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
To: SIEMENS WATER TECHNOLOGIES LLC
Reel/Frame 055845/0311 →
CHANGE OF NAME Recorded Feb 7, 2014
From: SIEMENS WATER TECHNOLOGIES LLC
To: EVOQUA WATER TECHNOLOGIES LLC
Reel/Frame 032174/0282 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT (SECOND LIEN) Recorded Jan 24, 2014
From: WTG HOLDINGS III CORP.; WTG HOLDINGS II CORP.; SIEMENS TREATED WATER OUTSOURCING CORP.; SIEMENS WATER TECHNOLOGIES LLC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 032126/0430 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT (FIRST LIEN) Recorded Jan 24, 2014
From: WTG HOLDINGS III CORP.; WTG HOLDINGS II CORP.; SIEMENS TREATED WATER OUTSOURCING CORP.; SIEMENS WATER TECHNOLOGIES LLC
To: CREDIT SUISSE AG, CAYMAN ISLANDS BRANCH, AS COLLATERAL AGENT
Reel/Frame 032126/0487 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 1, 2014
From: SIEMENS INDUSTRY, INC.
To: SIEMENS WATER TECHNOLOGIES LLC
Reel/Frame 031896/0256 →