US3709468A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static mixing dispenser and mixing method
Assignee: PMC Inc
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Filing: 1971-02-10
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Granted: 1973-01-09
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Expires: 1991-02-10
Abstract
Abstract In the course of flowing between a supply passage or passages, liquids are mixed by the bulk of the liquid following a helical path defined by a helical feather interrupted at intervals by notches or ports through which crosscurrents flow to intersect the main flow of liquid.
Inventors
- 👤 F Ives
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:35
CPC Classifications
B; B29; B29B; B29B7/00; B29B7/74; B29B7/7457; B01; B01F; B01F25/00; B01F25/40; B01F25/42; B01F25/43; B01F25/434
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
In static mixing mechanism for blending a small amount of relatively fluid liquid uniformly with a relatively large amount of relatively viscous liquid, including a cylindrical core and a helical feather convoluted around the cylindrical core defining a tortuous course for flow of the bulk of the liquid mixture, and bypass passages connecting portions of such tortuous course for flow of crosscurrents between such connected portions of the tortuous course, the improvement comprising an end plate blocking the entrance to such tortuous course and having small entrance passages therethrough offset outwardly a substantial distance from the periphery of the cylindrical core and constituting the sole entrance for the liquids.
Claim 2
Dependent Claim
109 words
In static mixing mechanism for blending a small amount of relatively fluid liquid uniformly with a relatively large amount of relatively viscous liquid, including a cylindrical core and a helical feather convoluted around the cylindrical core defining a tortuous course for flow of the bulk of the liquid mixture, and bypass passages connecting portions of such tortuous course for flow of crosscurrents between such connected portions of the tortuous course, the improvement comprising an end plate blocking the entrance to such tortuous course and having small entrance passages therethrough offset outwardly a substantial distance from the periphery of the cylindrical core and constituting the sole entrance for the liquids.
Claim 3
Dependent Claim
19 words
The mechanism defined in claim 1, in which the small entrance passages are peripheral notches in the end plate.
Claim 4
Dependent Claim
18 words
The mechanism defined in claim 1, in which the small entrance passages are apertures through the end plate.
Claim 5
Dependent Claim
47 words
the mechanism defined in claim 1, in which the bypass passages in adjacent convolutions are arranged in a row skewed with respect to the axis of the core for forming substantially a helix convoluted in the direction opposite to the direction of convolution of the helical feather.
Claim 6
Dependent Claim
41 words
The mechanism defined in claim 1, in which the end plate is a flange on one end of the core and the core area at the end plate is at least as great as the average cross-sectional area of the core.
Claim 7
Dependent Claim
91 words
In static mixing mechanism for blending a small amount of relatively fluid liquid uniformly with a relatively large amount of relatively viscous liquid, including a cylindrical core and a helical feather convoluted around the cylindrical core defining a tortuous course for flow of the bulk of the liquid mixture, the improvement comprising bypass peripheral notches in the helical feather, each notch being of a radial depth less than one-half the radial width of the feather and each notch being of a circumferential width at least as small as its radial depth.
Claim 8
Dependent Claim
91 words
In static mixing mechanism for blending a small amount of relatively fluid liquid uniformly with a relatively large amount of relatively viscous liquid, including a cylindrical core and a helical feather convoluted around the cylindrical core defining a tortuous course for flow of the bulk of the liquid mixture, the improvement comprising bypass peripheral notches in the helical feather, each notch being of a radial depth less than one-half the radial width of the feather and each notch being of a circumferential width at least as small as its radial depth.
Claim 9
Dependent Claim
117 words
In the method of blending a mixture of a plurality of liquids, which mixture includes predominantly viscous resin and a proportion of comparatively fluid catalyst, which proportion is a small fraction of the resin by weight, by flowing the bulk of the liquid mixture along a helical course convoluted around a core and at intervals along such helical course injecting into such flow of the liquid mixture bulk cross currents of such mixture, the improvement which comprises supplying the mixture of liquids to the helical course only in the form of a plurality of streams of such mixture introduced to the helical course at locations spaced outwardly from the core around which the helical course is convoluted.
Claim 10
Dependent Claim
117 words
In the method of blending a mixture of a plurality of liquids, which mixture includes predominantly viscous resin and a proportion of comparatively fluid catalyst, which proportion is a small fraction of the resin by weight, by flowing the bulk of the liquid mixture along a helical course convoluted around a core and at intervals along such helical course injecting into such flow of the liquid mixture bulk cross currents of such mixture, the improvement which comprises supplying the mixture of liquids to the helical course only in the form of a plurality of streams of such mixture introduced to the helical course at locations spaced outwardly from the core around which the helical course is convoluted.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |