Patent US2987389A successfully refreshed from Google Patents.
US3744762A
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Homogenizing method and apparatus
Assignee: Alfa Laval Bergedorfer Eisenwerke GmbH
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Filing: 1971-09-17
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Granted: 1973-07-10
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Expires: 1991-09-17
Abstract
Abstract A method and apparatus for homogenizing liquids containing a plurality of non-admixable phases. The liquid is forced under pressure and at high speed from the radially outward to the radially inward periphery of an annular gap, and during the passage it is made to undergo cavitation once or repetitively.
Inventors
- 👤 W Schlicht
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:33
CPC Classifications
B; B01; B01F; B01F25/00; B01F25/40; B01F25/44; B01F25/441; B01F25/4412
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A homogenizing method for liquids containing non-admixable phases, comprising the first step of establishing an annular gap having an outer and an inner periphery; the second step of passing a multi-phase liquid under pressure and at high speed through said annular gap from said outer towards said inner periphery thereof; and the third step of causing the development of cavitation in said liquid during passage thereof through said annular gap.
Claim 2
Dependent Claim
70 words
A homogenizing method for liquids containing non-admixable phases, comprising the first step of establishing an annular gap having an outer and an inner periphery; the second step of passing a multi-phase liquid under pressure and at high speed through said annular gap from said outer towards said inner periphery thereof; and the third step of causing the development of cavitation in said liquid during passage thereof through said annular gap.
Claim 3
Dependent Claim
27 words
A method as defined in claim 1, wherein said third step comprises causing the repeated development of cavitation during passage of said liquid through said annular gap.
Claim 4
Dependent Claim
66 words
A homogenizing apparatus, particularly for homogenizing liquids containing a plurality of non-admixable phases, comprising first means defining an annular gap having an outer and an inner periphery and being bounded by a pair of juxtaposed surfaces; and second means for effecting the development of cavitation in liquid passing at high speed and under pressure through said annular gap from saiD outer towards said inner periphery thereof.
Claim 5
Dependent Claim
66 words
A homogenizing apparatus, particularly for homogenizing liquids containing a plurality of non-admixable phases, comprising first means defining an annular gap having an outer and an inner periphery and being bounded by a pair of juxtaposed surfaces; and second means for effecting the development of cavitation in liquid passing at high speed and under pressure through said annular gap from saiD outer towards said inner periphery thereof.
Claim 6
Dependent Claim
68 words
An apparatus as defined in claim 3, said second means comprising at least one annular groove provided in at least one of said surfaces, the dimensions of said annular groove and of said annular gap being so coordinated that the liquid pressure within said annular gap is below, and in the region of said annular groove is above the boiling pressure of the continuous phase of said liquid.
Claim 7
Dependent Claim
28 words
An apparatus as defined in claim 4; and further comprising at least one additional annular groove provided in said one surface and concentric with said one annular groove.
Claim 8
Dependent Claim
22 words
An apparatus as defined in claim 5, wherein said annular grooves are closer to said inner periphery than to said outer periphery.
Claim 9
Dependent Claim
29 words
An apparatus as defined in claim 3; and further comprising at least one shear nozzle upstream of said annular gap and through which said liquid is compelled to pass.
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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) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |