Patent FR802682A successfully refreshed from Google Patents.
Patent US3792730A successfully refreshed from Google Patents.
US3792730A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate heat exchanger
Assignee: Alfa Laval AB
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Filing: 1973-03-12
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Granted: 1974-02-19
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Expires: 1993-03-12
Abstract
Abstract The distribution surface of each heat exchange plate has furrows and ridges extending between the inlet opening and the main heat exchanging surface of the plate. A gasket groove adjacent the distribution surface has a side wall formed by one of the ridges and merging into the bottom of the gasket groove along a continuous line. The side of this one ridge remote from the groove is provided with recesses forming extensions of the bottom of the furrow next to this ridge, these extensions being in the direction toward the gasket groove and being aligned with the regions where said furrow bottom is supported by the ridges of the adjacent plate. The latter ridges extend sufficiently to engage these extensions of the furrow bottom, thereby lending support to the bottom of the gasket groove.
Inventors
- 👤 J Andersson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:38
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/08; F28F3/083; F28F3/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
268 words
In the plate heat exchanger comprising paired plates each having a main heat exchanging portion, an inlet opening for a heat exchanging medium, and a distributing portion formed on one surface of the plate with furrows extending between said opening and main portion and with parallel ridges defining said furrows, the ridges and furrows on said one surface forming furrows and ridges, respectively, on the other surface of the plate, each said plate having outside its distributing portion a gasket groove partly defined by a side wall of an adjacent said ridge of the plate, said side wall merging into the bottom of the gasket groove along a continuous line, whereby a gasket situated in the groove will have a continuous support from said adjacent ridge, the ridges on one surface of one of said plates being arranged to cross and abut the ridges on the opposing surface of the other plate but extending short of supporting abutment with the bottom of the gasket groove of said other plate, the improvement wherein said adjacent ridge of each plate is provided, in its side wall remote from said gasket groove of the plate, with recesses forming extensions of the bottom of the adjacent furrow of the plate, said furrow extensions of each plate being in the direction toward the gasket groove of the plate, the furrow extensions of said other plate being aligned with regions where the bottom of said other plate''s said adjacent furrow is engaged and supported by the ridges of said one plate, said last ridges extending into abutment with said extensions of said other plate.
Claim 2
Dependent Claim
268 words
In the plate heat exchanger comprising paired plates each having a main heat exchanging portion, an inlet opening for a heat exchanging medium, and a distributing portion formed on one surface of the plate with furrows extending between said opening and main portion and with parallel ridges defining said furrows, the ridges and furrows on said one surface forming furrows and ridges, respectively, on the other surface of the plate, each said plate having outside its distributing portion a gasket groove partly defined by a side wall of an adjacent said ridge of the plate, said side wall merging into the bottom of the gasket groove along a continuous line, whereby a gasket situated in the groove will have a continuous support from said adjacent ridge, the ridges on one surface of one of said plates being arranged to cross and abut the ridges on the opposing surface of the other plate but extending short of supporting abutment with the bottom of the gasket groove of said other plate, the improvement wherein said adjacent ridge of each plate is provided, in its side wall remote from said gasket groove of the plate, with recesses forming extensions of the bottom of the adjacent furrow of the plate, said furrow extensions of each plate being in the direction toward the gasket groove of the plate, the furrow extensions of said other plate being aligned with regions where the bottom of said other plate''s said adjacent furrow is engaged and supported by the ridges of said one plate, said last ridges extending into abutment with said extensions of said other plate.
Claim 3
Dependent Claim
36 words
Paired plates according to claim 1, in which said adjacent furrow of each plate has relatively deep portions where said extensions of the furrow are located and has relatively shallow portions disposed between said deep portions.
Claim 4
Dependent Claim
18 words
Paired plates according to claim 2, in which said deep portions form grooves extending transversely of the furrow.
Claim 5
Dependent Claim
25 words
Paired plates according to claim 1, in which said adjacent ridge of each plate has relatively low portions opposite said extensions of the adjacent furrow.
Claim 6
Dependent Claim
31 words
Paired plates according to claim 4, in which each said low portion of the ridge has the same extension in the longitudinal direction of the ridge as the opposite said extension.
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) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |