US3860217A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shear mixer
Assignee: National Oilwell Varco LP
•
Filing: 1973-04-26
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Granted: 1975-01-14
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Expires: 1993-04-26
Abstract
Abstract A shear mixer for mixing components of a flowing fluid in which the mixing action is produced primarily, but not solely, by high internally generated shear forces. The basic element of the mixer is formed with a plurality of elongated channels, each preferably having an elliptic transverse cross section. The channels are disposed about each other in a helical arrangement and communicate with each other through one or more elongated helical slots formed in adjacent sides of two or more contiguous channels. The sides of each slot are cusp-shaped and the end faces of each mixing element are preferably concave at the ends of said channels with cusps in the end faces joining the cusps at the slot edges. A mixer may consist of a single element or of a plurality of such elements arranged with alternating right and left-handed helix groups, (a group consisting of one or more of such elements). The element or elements in one helix group has the transverse axis of each pair of its channels angularly disposed with respect to such axis of an adjacent group. Methods of making such mixers are also disclosed.
Inventors
- 👤 Kenneth M Grout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:35
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/432; B01F25/4323; B01F25/433
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
94 words
A mixer element comprising a body having therein a plurality of elongated channels extending through said body and displaced with respect to each other around a longitudinal axis, each of said elongated channels being disposed along a helix around said longitudinal axis, the helices of adjacent channels being disposed in the same sense around said longitudinal axis, the contiguous inner sides of adjacent channels being provided with at least one common opening through which said adjacent channels communicate with each other; said opening comprising an elongated slot extending throughout the length of said channels.
Claim 2
Dependent Claim
94 words
A mixer element comprising a body having therein a plurality of elongated channels extending through said body and displaced with respect to each other around a longitudinal axis, each of said elongated channels being disposed along a helix around said longitudinal axis, the helices of adjacent channels being disposed in the same sense around said longitudinal axis, the contiguous inner sides of adjacent channels being provided with at least one common opening through which said adjacent channels communicate with each other; said opening comprising an elongated slot extending throughout the length of said channels.
Claim 3
Dependent Claim
27 words
A mixer element according to claim 1 in which at least one end face of said body is concave at the end of each of said channels.
Claim 4
Dependent Claim
18 words
A mixer element according to claim 1 in which the number of said channels is at least three.
Claim 5
Dependent Claim
27 words
A mixer comprising a plurality of mixer elements according to claim 2 mounted in end to end relationship with their longitudinal axes in line with each other.
Claim 6
Dependent Claim
20 words
A mixer according to claim 4 in which said mixer elements are arranged in alternating right and left-handed helix groups.
Claim 7
Dependent Claim
19 words
A mixer according to claim 4 in which adjacent mixer elements are mounted with these ends abutting each other.
Claim 8
Dependent Claim
20 words
A mixer according to claim 4 in which adjacent mixer elements are mounted with their ends spaced from each other.
Claim 9
Dependent Claim
36 words
A mixer according to claim 4 in which the transverse axis through the centers of said channels of each of said units is angularly displaced with respEct to such transverse axis of each unit adjacent thereto.
Claim 10
Dependent Claim
17 words
A mixer according to claim 1 in which each of said channels has an elliptic cross section.
Claim 11
Dependent Claim
141 words
A mixer element comprising a body having therein a plurality of elongated channels extending through said body and displaced with respect to each other around a longitudinal axis, each of said elongated channels being disposed along a helix around said longitudinal axis, the helices of adjacent channels being disposed in the same sense around said longitudinal axis, the contiguous inner sides of adjacent channels being provided with at least one common opening through which said adjacent channels communicate with each other, at least one end face of said body being concave at the end of each of said channels, said concave face having pointed cusps transverse to the line joining the centers of said channels at said end face, each of said cusps extending from an edge of said slot to a point on said end face removed from said edge.
Claim 12
Dependent Claim
141 words
A mixer element comprising a body having therein a plurality of elongated channels extending through said body and displaced with respect to each other around a longitudinal axis, each of said elongated channels being disposed along a helix around said longitudinal axis, the helices of adjacent channels being disposed in the same sense around said longitudinal axis, the contiguous inner sides of adjacent channels being provided with at least one common opening through which said adjacent channels communicate with each other, at least one end face of said body being concave at the end of each of said channels, said concave face having pointed cusps transverse to the line joining the centers of said channels at said end face, each of said cusps extending from an edge of said slot to a point on said end face removed from said edge.
References Cited (Backward Citations)
US3286992A
Cited
US3664638A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |