US4929088A
Expired / Lapsed
US
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Static fluid flow mixing apparatus
Assignee: VORTAB Corp 619 PALISADE AVENUE ENGLEWOOD CLIFF NJ 07632 A CORP OF PA
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Filing: 1989-06-06
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Granted: 1990-05-29
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Expires: 2009-06-06
Abstract
Abstract A static mixing device adapted to be inserted in a fluid stream having a main flow direction with respect to a closed conduit, comprises at least two tabs inclined in the flow direction at a preselected elevation angle between 10° and 45° to the surface of the conduit. The tabs are spaced apart in a direction transverse to the flow direction, the length and width of the tabs being selected so as to generate pairs of oppositely rotating predominantly streamwise vortices at the tips of each tab, and downstream hairpin vortices interconnecting adjacent streamwise vortices generated by a single tab.
Inventors
- 👤 Charles R. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:18
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/30; B01F25/31; B01F25/314; B01F25/3141; B01F25/40; B01F25/42; B01F25/43; B01F25/431; B01F25/4315; B01F25/43151; B01F25/4316; B01F25/43163; B01F25/43197; B01F25/431974
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
92 words
A static mixing device adapted to be inserted in a fluid stream having a main flow direction with respect to at least one bounding surface, comprising: at least two tabs projecting from said at least one bounding surface and inclined in the flow direction at a preselected elevation to said bounding surface, said tabs being spaced apart in a direction transverse to said flow direction, the length (L), width (W) and elevation angle being selected so as to generate pairs of oppositely rotating, predominantly streamwise vortices at the tips of each tab.
Claim 2
Dependent Claim
92 words
A static mixing device adapted to be inserted in a fluid stream having a main flow direction with respect to at least one bounding surface, comprising: at least two tabs projecting from said at least one bounding surface and inclined in the flow direction at a preselected elevation to said bounding surface, said tabs being spaced apart in a direction transverse to said flow direction, the length (L), width (W) and elevation angle being selected so as to generate pairs of oppositely rotating, predominantly streamwise vortices at the tips of each tab.
Claim 3
Dependent Claim
39 words
A static mixing device according to claim 1, wherein the elevation angle and dimensions of said tabs are selected so as to result in the generation of downstream hairpin vortices interconnecting adjacent streamwise vortices produced by each individual tab.
Claim 4
Dependent Claim
17 words
A static mixing device according to claim 1, wherein said elevation angle is between 10° and 45°.
Claim 5
Dependent Claim
17 words
A static mixing device according to claim 3, wherein said elevation angle is between 20° and 35°.
Claim 6
Dependent Claim
10 words
A static mixing device according to claim 3, wherein: 0.5≦L/W≦3
Claim 7
Dependent Claim
10 words
A static mixing device according to claim 3, wherein: 1≦L/W≦2
Claim 8
Dependent Claim
21 words
A static mixing device according to claim 3, wherein said tabs are spaced apart a distance W s and wherein 0.5≦Ws/W≦2
Claim 9
Dependent Claim
56 words
A static mixing device according to claim 5, wherein said tabs are in the shape of a trapezoid with the width of each said tab at the end in contact with the bounding surface being W 1 and the width of said tab at the other end being W 2 , and wherein: 0.3≦W.sub.2 /W.sub.1 ≦1.2
Claim 10
Dependent Claim
12 words
A static mixing device according to claim 8, wherein: 0.6≦W.sub.2 /W.sub.1 ≦1.1
Claim 11
Dependent Claim
111 words
A static mixing device adapted to be inserted in a fluid stream having a main flow direction with respect to a closed conduit, comprising: at least two tabs projecting from said at least one bounding surface and inclined in the flow direction at preselected elevation angle between 10° and 45° to the interior surface of said conduit, said tabs being spaced apart in a direction transverse to said flow direction, the length (L) and width (W) of said tabs being selected so as to generate pairs of oppositely rotating the predominantly streamwise vortices at the tips of each tab, and downstream hairpin vortices interconnecting adjacent streamwise vortices generated by a single.
Claim 12
Dependent Claim
111 words
A static mixing device adapted to be inserted in a fluid stream having a main flow direction with respect to a closed conduit, comprising: at least two tabs projecting from said at least one bounding surface and inclined in the flow direction at preselected elevation angle between 10° and 45° to the interior surface of said conduit, said tabs being spaced apart in a direction transverse to said flow direction, the length (L) and width (W) of said tabs being selected so as to generate pairs of oppositely rotating the predominantly streamwise vortices at the tips of each tab, and downstream hairpin vortices interconnecting adjacent streamwise vortices generated by a single.
Claim 13
Dependent Claim
16 words
Static mixing device according to claim 10, wherein said elevation angle is between 20° and 35°.
Claim 14
Dependent Claim
10 words
A static mixing device according to claim 10, wherein: 0.5≦L/W≦3
Claim 15
Dependent Claim
10 words
A static mixing device according to claim 10, wherein: 1≦L/W≦2
Claim 16
Dependent Claim
21 words
A static mixing device according to claim 10, wherein said tabs are spaced apart a distance W s and wherein: 0.5≦Ws/W≦2
Claim 17
Dependent Claim
56 words
A static mixing device according to claim 12, wherein said tabs are in the shape of a trapezoid with the width of each said tab at the end in contact with said interior surface being W 1 and the width of said tab at the other end being W 2 , and wherein: 0.3≦W.sub.2 /W.sub.1 ≦1.2
Claim 18
Dependent Claim
12 words
A static mixing device according to claim 15, wherein: 0.6≦W.sub.2 /W.sub.1 1.1
Claim 19
Dependent Claim
25 words
A static mixing device according to claim 10, wherein four equally spaced tabs are arranged in an array around the interior surface of said conduit.
Claim 20
Dependent Claim
18 words
A static mixing device according to claim 10, including at least two spaced apart arrays of said tabs.
Claim 21
Dependent Claim
18 words
A static mixing device according to claim 18, wherein the corresponding tabs of adjacent arrays are radially aligned.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-28 | 1993-11-27 | 1994-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-28 | 1997-11-27 | 1998-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-28 | 2001-11-27 | 2002-05-29 | $7700.00 | Window Closed / Lapsed |