US3724538A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat exchanger
Assignee: Denso Corp
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Filing: 1971-10-27
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Granted: 1973-04-03
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Expires: 1991-10-27
Abstract
Abstract A corrugated heat exchanging fin element for use with a heat exchanger. The fin element has formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction. Each louver is depressed at the trailing side of the louver as viewed in the direction of feeding of a strip material for the formation of the louvers so that the stresses produced in the material of the louvers at the time of manufacture is removed to enable the fin element to be free from arcuate bend from which the fin element otherwise suffers.
Inventors
- 👤 T Yamaguchi
- 👤 Y Amano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:16
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/12; F28F1/126; F28F1/128; B; B21; B21D; B21D13/00; B21D13/04; B21D53/00; B21D53/02; B21D53/022; B21D53/025; B21D53/08; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12361; Y10T428/12368; Y10T428/1241
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
110 words
A corrugated heat exchanging fin element for use with a heat exchanger having conduits for a heat exchanging fluid, said fin element being adapted to be secured to the conduits, said fin element having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, each of said louvers being deformed at one of the leading and trailing sides thereof as viewed in the direction of feeding of a strip material for the formation of the fin element so that the stress produced in the material of the louver is at least partially removed.
Claim 2
Dependent Claim
110 words
A corrugated heat exchanging fin element for use with a heat exchanger having conduits for a heat exchanging fluid, said fin element being adapted to be secured to the conduits, said fin element having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, each of said louvers being deformed at one of the leading and trailing sides thereof as viewed in the direction of feeding of a strip material for the formation of the fin element so that the stress produced in the material of the louver is at least partially removed.
Claim 3
Dependent Claim
23 words
A corrugated heat exchanging fin element as defined in claim 1, wherein each of said louvers is depressed at the trailing side thereof.
Claim 4
Dependent Claim
102 words
A heat exchanger including conduits for a heat exchanging fluid and corrugated heat exchanging fin elements secured to the conduits, each of said fin elements having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, each of said louvers being deformed at one of the leading and trailing sides thereof as viewed in the direction of feeding of a metal strip for the formation of the fin element so that the stress produced in the material of the louver is at least partially removed.
Claim 5
Dependent Claim
102 words
A heat exchanger including conduits for a heat exchanging fluid and corrugated heat exchanging fin elements secured to the conduits, each of said fin elements having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, each of said louvers being deformed at one of the leading and trailing sides thereof as viewed in the direction of feeding of a metal strip for the formation of the fin element so that the stress produced in the material of the louver is at least partially removed.
Claim 6
Dependent Claim
20 words
A heat exchanger as defined in claim 3, wherein each of said louvers is depressed at the trailing side thereof.
Claim 7
Independent Claim
210 words
A method of manufacturing a corrugated heat exchanging fin element for use with a heat exchanger having conduits for a heat exchanging fluid, said fin element being adapted to be secured to the conduits, said fin element having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, said method comprising the steps of feeding a metal strip into the nip of a pair of toothed roller dies having at least a row of louver forming blades formed on each of the teeth on the roller dies to cause the metal strip to be corrugated and formed with rows of louvers by said teeth and louver forming blades for forming an unfinished fin element, then feeding the latter into the nip of another pair of toothed rollers having at least a row of louver deforming portion on each of the teeth of the rollers to cause at one of the leading and trailing sides of each of the louvers to be deformed by said louver deforming portions whereby the stress produced in said trailing side of each louver at the time the same is formed is at least partially removed by the deformation.
Claim 8
Independent Claim
210 words
A method of manufacturing a corrugated heat exchanging fin element for use with a heat exchanger having conduits for a heat exchanging fluid, said fin element being adapted to be secured to the conduits, said fin element having formed thereon louvers extending therefrom at an angle with respect to the flow of a coolant and cut to define apertures opened in substantially the same direction, said method comprising the steps of feeding a metal strip into the nip of a pair of toothed roller dies having at least a row of louver forming blades formed on each of the teeth on the roller dies to cause the metal strip to be corrugated and formed with rows of louvers by said teeth and louver forming blades for forming an unfinished fin element, then feeding the latter into the nip of another pair of toothed rollers having at least a row of louver deforming portion on each of the teeth of the rollers to cause at one of the leading and trailing sides of each of the louvers to be deformed by said louver deforming portions whereby the stress produced in said trailing side of each louver at the time the same is formed is at least partially removed by the deformation.
Claim 9
Dependent Claim
29 words
A method as defined in claim 5, wherein the trailing side of each of said louvers is depressed by said louver deforming portions on said another pair of rollers.
Claim 10
Dependent Claim
75 words
A method as defined in claim 6, wherein, after the depression, the corrugated heat exchanging fin element is advanced into the nip of a further pair of toothed rollers by which said fin element is positively driven and advanced to a braking means which is in frictional sliding contact with the run of the fin element to narrow the pitch of the corrugation of the fin element by the brakiNg action of said braking means.
References Cited (Backward Citations)
US3433044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |