Patent BE543330A successfully refreshed from Google Patents.
Patent US3817324A successfully refreshed from Google Patents.
US3817324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanging plate
Assignee: Alfa Laval AB
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Filing: 1972-10-24
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Granted: 1974-06-18
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Expires: 1992-10-24
Abstract
Abstract Each side of the plate has two distribution surfaces provided with pressed ridges extending side-by-side from an inlet hole and an outlet hole, respectively, to a centrally located main heat exchanging surface, the back sides of the troughs between the ridges forming the ridges on the opposite side of the plate. The troughs are wider than the ridges, so as to reduce the flow resistance along each distribution surface; but this width difference is less at those regions of the distribution surface which are close to said main surface than at other regions of the distribution surface, whereby the contact areas formed by crossing and abutting ridges of adjacent plates in a heat exchanger are greater at said close regions where they must transmit greater forces.
Inventors
- 👤 J Lund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:59
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/04; F28F3/042; F28F3/046; F28F3/08; F28F3/083; F28F9/00; F28F9/02; F28F9/026
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
174 words
For use in a plate heat exchanger, a heat exchanging plate having a main heat exchanging portion and two distribution portions, said three portions forming on each side of the plate a centrally located main heat exchanging surface and two distribution surfaces separated by said main surface, each distribution surface on one of the plate sides having pressed ridges extending side-by-side tO said main surface from a remote part of the plate and also having troughs formed between the ridges, said troughs being wider than the ridges and being operable to direct a heat exchanging medium to and from said main surface, the ridges being arranged to cross and abut the back sides of the troughs in the distribution surfaces of a similar adjacent plate in a plate heat exchanger, the plate being characterized in that the difference between the width of the ridges and the width of the troughs is smaller at the regions of the distribution surfaces which are close to said main surface than at other regions of said distribution surfaces.
Claim 2
Dependent Claim
174 words
For use in a plate heat exchanger, a heat exchanging plate having a main heat exchanging portion and two distribution portions, said three portions forming on each side of the plate a centrally located main heat exchanging surface and two distribution surfaces separated by said main surface, each distribution surface on one of the plate sides having pressed ridges extending side-by-side tO said main surface from a remote part of the plate and also having troughs formed between the ridges, said troughs being wider than the ridges and being operable to direct a heat exchanging medium to and from said main surface, the ridges being arranged to cross and abut the back sides of the troughs in the distribution surfaces of a similar adjacent plate in a plate heat exchanger, the plate being characterized in that the difference between the width of the ridges and the width of the troughs is smaller at the regions of the distribution surfaces which are close to said main surface than at other regions of said distribution surfaces.
Claim 3
Dependent Claim
27 words
A heat exchanging plate according to claim 1, in which the end portions of the ridges adjacent said main surface are enlarged to effect said smaller difference.
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) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |