US4461348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Denso Corp
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Filing: 1983-03-31
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Granted: 1984-07-24
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Expires: 2003-03-31
Abstract
Abstract A heat exchanger of this invention used as a radiator for an automotive vehicle has a core plate having a holding groove around its periphery for receiving a seal member as well as a flange of a tank member, wherein a concave-convex portion is formed in the outer surface of the outer or inner side wall forming the holding groove. According to this structure, an excess molten solder is gathered toward the concave-convex portion when the core plate is heated for soldering in a heat furnace. This prevents the excess solder from making a drop-shaped mass which has an adverse influence on a seal efficiency of the seal member.
Inventors
- 👤 Hiroaki Toge
- 👤 Shinichi Esaka
- 👤 Yutaka Murakami
- 👤 Toshiaki Murao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:50
CPC Classifications
F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0224; F28F9/0226; F28F2275/00; F28F2275/12; F28F2275/122; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/471; Y10S165/473; Y10S165/474
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
165 words
A heat exchanger comprising; a plastic tank member having a flange portion at its open end; a core unit having tubes and fins connected with each other by soldering; a core plate fixed to said core unit, said core plate having an inner side wall, a bottom wall and an outer side wall to thereby form a holding groove for receiving said flange portion, said core plate having also a plurality of hooks extending from said outer side wall, said hooks being bent over said flange portion to fix said tank member to said core plate; and a seal member disposed in said holding groove and between said bottom wall and said flange portion; wherein the improvement comprises; a concave-convex portion formed in an outer surface of at least one of said inner side wall, outer side wall and hook of a size such that the solder will be attached thereto by surface tension during said soldering to leave the core plate substantially solder free.
Claim 2
Dependent Claim
165 words
A heat exchanger comprising; a plastic tank member having a flange portion at its open end; a core unit having tubes and fins connected with each other by soldering; a core plate fixed to said core unit, said core plate having an inner side wall, a bottom wall and an outer side wall to thereby form a holding groove for receiving said flange portion, said core plate having also a plurality of hooks extending from said outer side wall, said hooks being bent over said flange portion to fix said tank member to said core plate; and a seal member disposed in said holding groove and between said bottom wall and said flange portion; wherein the improvement comprises; a concave-convex portion formed in an outer surface of at least one of said inner side wall, outer side wall and hook of a size such that the solder will be attached thereto by surface tension during said soldering to leave the core plate substantially solder free.
Claim 3
Dependent Claim
25 words
A heat exchanger as claimed in claim 1, wherein said concave-convex portion is a concave formed in the outer surface of said outer side wall.
Claim 4
Dependent Claim
30 words
A heat exchanger as claimed in claim 2, wherein said concave is formed in the outer surface of said outer side wall and between portions from which said hooks extend.
Claim 5
Dependent Claim
25 words
A heat exchanger as claimed in claim 2, wherein said concave is formed in the outer surface of a portion from which said hook extends.
Claim 6
Dependent Claim
30 words
A heat exchanger as claimed in claim 3, wherein the height of said concave is the same as that of said outer side wall where said concave is not formed.
Claim 7
Dependent Claim
25 words
A heat exchanger as claimed in claim 1, wherein said concave-convex portion is a concave formed in the outer surface of said inner side wall.
Claim 8
Dependent Claim
23 words
A heat exchanger as claimed in claim 1, wherein said concave-convex portion is a concave formed in the outer surface of said hook.
Claim 9
Dependent Claim
25 words
A heat exchanger as claimed in claim 1 wherein said concave-convex portion is a convex formed in the outer surface of said outer side wall.
Claim 10
Dependent Claim
30 words
A heat exchanger as claimed in claim 8, wherein said convex is formed in the outer surface of said outer side wall and between portions from which said hooks extends.
Claim 11
Dependent Claim
25 words
A heat exchanger as claimed in claim 8, wherein said convex is formed in the outer surface of a portion from which said hook extends.
Claim 12
Dependent Claim
30 words
A heat exchanger as claimed in claim 9, wherein the height of said convex is the same as that of said outer side wall where said convex is not formed.
Claim 13
Dependent Claim
25 words
A heat exchanger as claimed in claim 1, wherein said concave-convex portion is a convex formed in the outer surface of said inner side wall.
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) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |