US6182746B1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plate-type heat exchanger
Assignee: Mahle Behr GmbH and Co KG
•
Filing: 1998-11-16
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Granted: 2001-02-06
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Expires: 2018-11-16
Abstract
Abstract In connection with a plate-type heat exchanger having several stacked, tub-shaped heat exchanger plates, each with a circumferential, beveled border, the borders of these heat exchanger plates being embodied to be curved and bent outward. This results in improved brazing of the heat exchanger plates with each other.
Inventors
- 👤 Manfred Wiese
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
F; F28; F28D; F28D9/00; F28D9/0031; F28D9/0043; F28D9/005; F28D21/00; F28D2021/0019; F28D2021/008; F28D2021/0089; F28F; F28F2280/00; F28F2280/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
129 words
A plate-type heat exchanger, comprising: at least two stacked tub-shaped heat exchanger plates, each tub-shaped heat exchanger plate having: a plate bottom; a circumferential, beveled border; and inlet and outlet passages for fluid passage, wherein said plate bottom of each tub-shaped heat exchanger plate includes a transition, without a step, into its associated circumferential beveled border; said circumferential, beveled border of each tub-shaped heat exchanger plate has one of a continuous and discontinuous curvature, with the curvature directed outwardly from the tub-shaped heat exchanger plate; and said circumferential, beveled border of adjoining tub-shaped heat exchanger plates having joined surfaces which are connected to each other by brazing along their curvature, such that a brazed fillet is formed between and contacts curved surfaces of facing surface portions of adjacent plates.
Claim 2
Dependent Claim
129 words
A plate-type heat exchanger, comprising: at least two stacked tub-shaped heat exchanger plates, each tub-shaped heat exchanger plate having: a plate bottom; a circumferential, beveled border; and inlet and outlet passages for fluid passage, wherein said plate bottom of each tub-shaped heat exchanger plate includes a transition, without a step, into its associated circumferential beveled border; said circumferential, beveled border of each tub-shaped heat exchanger plate has one of a continuous and discontinuous curvature, with the curvature directed outwardly from the tub-shaped heat exchanger plate; and said circumferential, beveled border of adjoining tub-shaped heat exchanger plates having joined surfaces which are connected to each other by brazing along their curvature, such that a brazed fillet is formed between and contacts curved surfaces of facing surface portions of adjacent plates.
Claim 3
Dependent Claim
60 words
The plate-type heat exchanger as defined in claim 1 , wherein: a transition area is defined for each tub-shaped heat exchanger plate between each plate bottom and its associated circumferential, beveled border, and said transition area of one tub-shaped heat exchanger plate rests against an interior facing surface of said circumferential, beveled border of the adjoining tub-shaped heat exchanger plate.
Claim 4
Dependent Claim
34 words
The plate-type heat exchanger as defined in claim 1 , wherein: each circumferential, beveled border includes a free longitudinal edge; and adjoining circumferential, beveled borders diverge in the direction of their free longitudinal edges.
Claim 5
Dependent Claim
23 words
The plate-type heat exchanger as defined in claim 1 , wherein: for continuously curved circumferential, beveled borders, the radius of curvature is constant.
Claim 6
Dependent Claim
42 words
The plate-type heat exchanger as defined in claim 1 , wherein: each circumferential, beveled border includes a free longitudinal edge; and for continuously curved circumferential, beveled borders, the radius of curvature various, from its associated plate bottom toward said free longitudinal edge.
Claim 7
Dependent Claim
17 words
The plate-type heat exchanger as defined in claim 5 , wherein: the radius of curvature is reduced.
Claim 8
Dependent Claim
35 words
The plate-type heat exchanger as defined in claim 1 , wherein: for discontinuously curved circumferential, beveled borders, at least one kink line is provided which extends in the longitudinal direction of said circumferential, beveled border.
Claim 9
Dependent Claim
16 words
The plate-type heat exchanger as defined in claim 7 , wherein: two kink lines are provided.
Claim 10
Dependent Claim
19 words
The plate-type heat exchanger as defined in claim 1 , wherein: said circumferential, beveled border extends toward the exterior.
Claim 11
Dependent Claim
19 words
The plate-type heat exchanger as defined in claim 1 , further comprising: at least one turbulence insert is provided.
Claim 12
Dependent Claim
25 words
The plate-type heat exchanger as defined in claim 10 , wherein: said turbulence insert is used as a spacer for adjoining tub-shaped heat exchanger plates.
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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) | 2004-02-06 | 2004-08-07 | 2005-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-02-06 | 2008-08-07 | 2009-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-02-06 | 2012-08-07 | 2013-02-06 | $7700.00 | Window Closed / Lapsed |