US3668358A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for electromagnetic heating of liquids
Assignee: Alfa Laval AB
•
Filing: 1970-05-21
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Granted: 1972-06-06
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Expires: 1990-05-21
Abstract
Abstract The liquid to be heated is formed by suitable means into a jet having an annular cross-section and which is free from contact with any surface; and means are provided for transferring to the annular jet electromagnetic energy uniformly distributed around the periphery of the jet as viewed in said cross-section.
Inventors
- 👤 Lennart Arvid Stenstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:06
CPC Classifications
H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; H05B6/802; A; A23; A23B; A23B11/00; A23B11/10; A23B11/16; A23B2/00; A23B2/05; A23B2/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
In an apparatus for electromagnetic heating of liquids, the combination of means for forming the liquid to be heated into a jet, and means for transferring to said jet electromagnetic energy uniformly distributed around the periphery of the jet as viewed in a cross-section of the jet, the combination being characterized in that said forming means include a body having a liquid receiving portion and a liquid discharging portion extending generally along a closed circuit for forming the liquid into a jet having a generally annular cross-section and which is free from contact with any surface, said discharging portion being dimensioned to provide said annular cross-section with a thin wall, whereby each part of the jet as viewed in said annular cross-section is heated to substantially the same temperature.
Claim 2
Dependent Claim
129 words
In an apparatus for electromagnetic heating of liquids, the combination of means for forming the liquid to be heated into a jet, and means for transferring to said jet electromagnetic energy uniformly distributed around the periphery of the jet as viewed in a cross-section of the jet, the combination being characterized in that said forming means include a body having a liquid receiving portion and a liquid discharging portion extending generally along a closed circuit for forming the liquid into a jet having a generally annular cross-section and which is free from contact with any surface, said discharging portion being dimensioned to provide said annular cross-section with a thin wall, whereby each part of the jet as viewed in said annular cross-section is heated to substantially the same temperature.
Claim 3
Dependent Claim
34 words
The combination according to claim 8, in which said energy transferring means comprise two members arranged coaxially relative to the annular jet, at least one of said members being operable to emit electromagnetic energy.
Claim 4
Dependent Claim
16 words
The combination according to claim 2, in which said one member is operable to emit microwaves.
Claim 5
Dependent Claim
23 words
The combination according to claim 2, in which said one member is located within the annular jet, the other member surrounding the jet.
Claim 6
Dependent Claim
39 words
The combination according to claim 8, in which said energy transferring means define a space where the annular jet is to be heated and are operable to emit electromagnetic waves at a frequency for achieving resonance in said space.
Claim 7
Dependent Claim
25 words
The combination according to claim 1, in which the apparatus also comprises a generally annular wall positioned to surround said jet in spaced relation thereto.
Claim 8
Dependent Claim
36 words
The combination according to claim 6, in which said body of the jet-forming means is a hollow body having an inlet for the liquid and also having a downwardly directed liquid outlet of generally annular shape.
References Cited (Backward Citations)
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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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |