US5327958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked-plate heat exchanger
Assignee: Tenez AS
•
Filing: 1993-06-22
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Granted: 1994-07-12
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Expires: 2013-06-22
Abstract
Abstract A stacked-plate heat exchanger. The plates are welded together alternately along lateral ridges and flanges formed around the periphery of the plates. The plates are also welded along the circumference of intake-and-outlet openings.
Inventors
- 👤 Vaclav Machata
- 👤 Karel Hubacek
- 👤 Edmund Neubauer
- 👤 Karel Tvrdy
- 👤 Jaromir Tecl
- 👤 Zdenek Matejka
- 👤 Tomas Zvolanek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:22
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0043; F28D9/005; F28F; F28F2240/00; F28F2275/00; F28F2275/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
228 words
In a stacked-plate heat exchanger, wherein several corrugated and generally rectangular plates, each of which including a midplane having undulations formed therein, are stacked and welded together to be sealed off from the environment, and having hollow spaces formed between the plates and intake-and-outlet openings at the corners, with alternating spaces being occupied by one of two fluids which exchange heat, the improvement comprising: a lateral flange (4) at the periphery of the plates and surrounding a lateral ridge (3), the lateral flange being parallel to the midplane and lying in a plane defined by crests of the undulations on one side of the midplane, and the lateral ridge being parallel to the midplane and lying in a plane defined by crests of the undulations on the other side of the midplane; wherein the intake-and-outlet openings (2) provided in each plate for one of the fluids are surrounded by annular ridges (9) in substantially the same plane as the lateral ridge, and the outlet-and-intake openings for the other fluid are surrounded by annular ridges (5) in substantially the same plane as the lateral flange; adjacent plates being welded together along the lateral ridges and along the annular ridges, or cylindrical flanges (5a, 9a) adjacent thereto, to produce a subassembly, and adjacent subassemblies being welded along abutting lateral flanges and along abutting annular ridges, or their adjacent cylindrical flanges.
Claim 2
Dependent Claim
228 words
In a stacked-plate heat exchanger, wherein several corrugated and generally rectangular plates, each of which including a midplane having undulations formed therein, are stacked and welded together to be sealed off from the environment, and having hollow spaces formed between the plates and intake-and-outlet openings at the corners, with alternating spaces being occupied by one of two fluids which exchange heat, the improvement comprising: a lateral flange (4) at the periphery of the plates and surrounding a lateral ridge (3), the lateral flange being parallel to the midplane and lying in a plane defined by crests of the undulations on one side of the midplane, and the lateral ridge being parallel to the midplane and lying in a plane defined by crests of the undulations on the other side of the midplane; wherein the intake-and-outlet openings (2) provided in each plate for one of the fluids are surrounded by annular ridges (9) in substantially the same plane as the lateral ridge, and the outlet-and-intake openings for the other fluid are surrounded by annular ridges (5) in substantially the same plane as the lateral flange; adjacent plates being welded together along the lateral ridges and along the annular ridges, or cylindrical flanges (5a, 9a) adjacent thereto, to produce a subassembly, and adjacent subassemblies being welded along abutting lateral flanges and along abutting annular ridges, or their adjacent cylindrical flanges.
Claim 3
Dependent Claim
22 words
A heat exchanger as in claim 1, wherein the plates are identical, and one is rotated 180° in relation to the other.
Claim 4
Dependent Claim
44 words
A heat exchanger as in claim 1, wherein said annular ridges (5) on one side of a longitudinal axis of the plate face in one direction and said annular ridges (9) on the other side of the longitudinal axis face in the opposite direction.
Claim 5
Dependent Claim
20 words
A heat exchanger as in claim 1, wherein said lateral ridges (3) and flanges (4) on each plate are flat.
Claim 6
Dependent Claim
19 words
A heat exchanger as in claim 1, wherein said annular ridges (5, 9) around the openings (2) are flat.
Claim 7
Dependent Claim
37 words
A heat exchanger as in claim 1, wherein said cylindrical flanges (5a, 9a) are approximately perpendicular to the annular ridges (5, 9), and the plates in one subassembly have cylindrical flanges that fit one inside the other.
Claim 8
Dependent Claim
49 words
A heat exchanger as in claim 6, wherein cylindrical flanges on the plate at the rear of a subassembly in relation to the cylindrical flanges are long enough so that the free edges of the cylindrical flanges will be adjacent to each other once the subassembly has been assembled.
Claim 9
Dependent Claim
28 words
A heat exchanger as in claim 7, wherein the plates are identical except that the cylindrical flanges on some extend opposite to the cylindrical flanges on the others.
Claim 10
Dependent Claim
28 words
A heat exchanger as in claim 6, wherein the plates are identical except that the cylindrical flanges on some extend opposite to the cylindrical flanges on the others.
Claim 11
Dependent Claim
34 words
A heat exchanger as in claim 1, wherein said lateral ridges (3) and said lateral flanges (4) are attached together by a spacer that extends along them perpendicular to the midplanes of the plates.
Claim 12
Dependent Claim
47 words
A heat exchanger as in claim 1, wherein the plates lack a lateral flange (4), and adjacent subassemblies are welded together by way of U-shaped bars (10) extending along and between them with their sides against and welded tight to respective facing surfaces of lateral ridges (3).
Claim 13
Dependent Claim
17 words
A heat exchanger as in claim 11, wherein said bars (10) are made of a unitary structure.
Claim 14
Dependent Claim
31 words
A heat exchanger as in claim 11, wherein the welds along the cylindrical flanges (5a, 9a), the lateral ridges (3), the lateral flanges (4), and said bars (10) are edge welds.
Claim 15
Dependent Claim
31 words
A heat exchanger as in claim 11, wherein the welds along the cylindrical flanges (5a, 9a), the lateral ridges (3), the lateral flanges (4), and said bars (10) are edge welds.
References Cited (Backward Citations)
US3590917A
Cited
GB2126703A
Cited
US4592914A
Cited
GB2167175A
Cited
US4723601A
Cited
JPS6433497A
Cited
WO1991013308A1
Cited
US5158135A
Cited
US5125453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |