US4169502A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular heat exchanger
Assignee: Volkswagen AG
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Filing: 1977-03-28
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Granted: 1979-10-02
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Expires: 1997-03-28
Abstract
Abstract A tubular heat exchanger, which may be used as an automobile radiator or the like, comprises tubes for transporting a liquid heat transfer medium between two collecting chambers, and lamellar baffles, supported by the tubes in substantially perpendicular relationship thereto, for intercepting a gaseous heat transfer medium flowing past the tubes. The tubes are disposed substantially equidistant one from another such that, when viewed in cross section, their centers are arranged in series along a first line which extends uniformly back and forth with respect to a substantially straight second line. Each section of the first line, which extends from one side to the other of the second line, passes through at least three tubes.
Inventors
- 👤 Erwin Kluck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:09
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/24; F28F1/32; F28F1/325; F28D; F28D1/00; F28D1/02; F28D1/04; F28D1/053; F28D2001/0253; F28D2001/026; F28D2001/0266; F28F2240/00; Y; Y10; Y10S; Y10S165/00; Y10S165/454; Y10S165/50; Y10S165/501; Y10S165/502; Y10S165/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
In a tubular heat exchanger comprising a plurality of tubes adapted to transport a liquid heat transfer medium between two collecting chambers, and a plurality of lamellar baffles arranged closely adjacent one to the other and supported by said tubes in substantially perpendicular relationship thereto, said baffles being adapted to intercept a gaseous heat transfer medium flowing past said tubes; the improvement wherein all of said tubes are disposed such that, when viewed in cross section, their centers are arranged in series along a single first line which extends uniformly back and forth at least twice with respect to a substantially straight second line, each section of said first line, which extends from one side to the other of said second line, passing through at least three tubes; and wherein each of said baffles has longitudinal edges which include portions extending substantially parallel to said first line.
Claim 2
Dependent Claim
147 words
In a tubular heat exchanger comprising a plurality of tubes adapted to transport a liquid heat transfer medium between two collecting chambers, and a plurality of lamellar baffles arranged closely adjacent one to the other and supported by said tubes in substantially perpendicular relationship thereto, said baffles being adapted to intercept a gaseous heat transfer medium flowing past said tubes; the improvement wherein all of said tubes are disposed such that, when viewed in cross section, their centers are arranged in series along a single first line which extends uniformly back and forth at least twice with respect to a substantially straight second line, each section of said first line, which extends from one side to the other of said second line, passing through at least three tubes; and wherein each of said baffles has longitudinal edges which include portions extending substantially parallel to said first line.
Claim 3
Dependent Claim
22 words
The tubular heat exchanger defined in claim 1, wherein said first line is a zig-zag line having a plurality of straight sections.
Claim 4
Dependent Claim
15 words
The tubular heat exchanger defined in claim 1, wherein said longitudinal edges have rounded corners.
Claim 5
Dependent Claim
18 words
The tubular heat exchanger defined in claim 3, wherein the radius of curvature of said corners is constant.
Claim 6
Dependent Claim
27 words
The tubular heat exchanger defined in claim 1, wherein tear holes are provided in said baffles in an area adjacent the inner corners of said longitudinal edges.
Claim 7
Dependent Claim
37 words
The tubular heat exchanger defined in claim 1, wherein the tubes arranged along each section of said first line, which extends from one side to the other of said second line, are substantially equidistant one from another.
References Cited (Backward Citations)
SU231565A1
Cited
FR585172A
Cited
US2228549A
Cited
US3080916A
Cited
US3916989A
Cited
US3902551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-01 | 1983-04-02 | 1983-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-01 | 1987-04-02 | 1987-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-01 | 1991-04-02 | 1991-10-02 | $7700.00 | Window Closed / Lapsed |