US4269265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tubular heat exchanger with turbulator
Assignee: Modine Manufacturing Co
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Filing: 1979-11-29
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Granted: 1981-05-26
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Expires: 1999-11-29
Abstract
Abstract A tubular heat exchanger for liquids having a turbulator in a liquid flow tube offering low resistance to internal liquid flow. The liquid flow tube has an inside surface and transverse minor and major inner dimensions. The internal turbulator is elongated and comprises a heat conducting wire having successive, substantially canted undulations in contact with the tube's inner surface.
Inventors
- 👤 Robert A. Meyer
- 👤 Richard A. Bretl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:00
CPC Classifications
F; F28; F28F; F28F1/00; F28F1/10; F28F1/40; F28F1/405; F28F1/02; F28F13/00; F28F13/06; F28F13/12; Y; Y10; Y10S; Y10S165/00; Y10S165/51; Y10S165/529; Y10S165/53
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
87 words
A tubular heat exchanger for liquids with a turbulator in the tube offering low resistance to internal liquid flow, comprising: a liquid flow tube having an inside surface and transverse minor and major inner dimensions, said major inner dimension being greater than said minor inner dimension; and an elongated internal turbulator comprising a continuous length of heat conducting wire spanning the length of said tube, said wire having successive undulations in contact with said inner surface, said turbulator substantially spanning said tube in said transverse major dimension.
Claim 2
Dependent Claim
87 words
A tubular heat exchanger for liquids with a turbulator in the tube offering low resistance to internal liquid flow, comprising: a liquid flow tube having an inside surface and transverse minor and major inner dimensions, said major inner dimension being greater than said minor inner dimension; and an elongated internal turbulator comprising a continuous length of heat conducting wire spanning the length of said tube, said wire having successive undulations in contact with said inner surface, said turbulator substantially spanning said tube in said transverse major dimension.
Claim 3
Dependent Claim
18 words
The heat exchanger of claim 1 wherein said turbulator is canted with respect to the said transverse dimensions.
Claim 4
Dependent Claim
89 words
A tubular heat exchanger for liquids with a turbulator in the tube offering low resistance to internal liquid flow, comprising: a liquid flow tube having an inside surface and transverse minor and major inner dimensions, said major inner dimension being greater than said minor inner dimension; and an elongated internal turbulator comprising successive continuous lengths of heat conducting wire that together span the length of said tube, said wire having successive undulations in contact with said inner surface, said turbulator substantially spanning said tube in said transverse major dimension.
Claim 5
Dependent Claim
89 words
A tubular heat exchanger for liquids with a turbulator in the tube offering low resistance to internal liquid flow, comprising: a liquid flow tube having an inside surface and transverse minor and major inner dimensions, said major inner dimension being greater than said minor inner dimension; and an elongated internal turbulator comprising successive continuous lengths of heat conducting wire that together span the length of said tube, said wire having successive undulations in contact with said inner surface, said turbulator substantially spanning said tube in said transverse major dimension.
References Cited (Backward Citations)
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GB417668A
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US2300579A
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GB538018A
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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) | 1984-05-25 | 1984-11-24 | 1985-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-05-25 | 1988-11-24 | 1989-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-05-25 | 1992-11-24 | 1993-05-26 | $7700.00 | Window Closed / Lapsed |