Patent US3731737A successfully refreshed from Google Patents.
US3731737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: Alfa Laval AB
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Filing: 1969-03-10
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Granted: 1973-05-08
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Expires: 1989-03-10
Abstract
Abstract A plurality of identical heat exchange plates have respective heat exchange surfaces provided with protuberances acting as turbulence-effecting and spacing means between adjacent plates, such plates being adapted for assembly with marginal gaskets to form plate interspaces for throughflow of two heat exchange media along said surfaces at opposite sides (faces), respectively, of each plate. The plate interspaces are of the same depth, and at least one plate is turned 180* relative to the other plates around an axis extending in the plane of the turned plate, the protuberances of each plate being arranged unsymmetrically and so disposed that two different kinds of plate interspaces are formed by such turning of said one plate, thereby creating different flow conditions for the heat exchange media.
Inventors
- 👤 S Jenssen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:38
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F28F3/02; F28F3/04; F28F3/042; F28F3/046
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
134 words
For use in a plate heat exchanger, a plurality of identical heat exchange plates having respective heat exchange surfaces provided with protuberances acting as turbulence-effecting and spacing means between adjacent plates, said plates being adapted for assembly with marginal gaskets to form plate interspaces for throughflow of two heat exchange media along said surfaces at opposite sides, respectively, of each plate, said plates being characterized in that said interspaces are of equal depth and at least one plate is turned 180* relative to the other plates around an axis extending in the plane of the turned plate, said protuberances of each plate being arranged unsymmetrically and so disposed that two different kinds of plate interspaces are formed by said turning of said one plate, thereby creating different flow conditions for the heat exchange media.
Claim 2
Dependent Claim
134 words
For use in a plate heat exchanger, a plurality of identical heat exchange plates having respective heat exchange surfaces provided with protuberances acting as turbulence-effecting and spacing means between adjacent plates, said plates being adapted for assembly with marginal gaskets to form plate interspaces for throughflow of two heat exchange media along said surfaces at opposite sides, respectively, of each plate, said plates being characterized in that said interspaces are of equal depth and at least one plate is turned 180* relative to the other plates around an axis extending in the plane of the turned plate, said protuberances of each plate being arranged unsymmetrically and so disposed that two different kinds of plate interspaces are formed by said turning of said one plate, thereby creating different flow conditions for the heat exchange media.
Claim 3
Dependent Claim
61 words
Heat exchange plates according to claim 1, wherein said protuberances on each side of each plate are formed by ridges extending in parallel spaced relation, some of the interspaces containing ridges of one plate extending parallel to ridges of the adjacent plate, at least one other interspace containing ridges of one plate forming an angle with ridges of the adjacent plate.
Claim 4
Dependent Claim
23 words
Heat exchange plates according to claim 2, comprising also bridges extending between the ridges of each plate and acting therewith as spacing protuberances.
Claim 5
Dependent Claim
28 words
Heat exchange plates according to claim 1, wherein said protuberances on one side of each plate are shaped differently than the protuberances on the other of said plate.
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) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |