# US 2009/0260784 A1 · Heat Exchanger and Method of Forming a Heat Exchanger

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- Number: US 2009/0260784 A1
- Document ID: US20090260784A1
- Status: Published application
- Kind: A1
- Application number: 12/424,956
- Filed: 2009-04-16
- Published: 2009-10-22
- Earliest claimed: 2008-04-21
- Inventors: Allan Stikeleather
- Web page: https://patentgrep.com/patent/US20090260784A1

## CPC

- B23P 15/26: heat exchangers {or the like (making heat exchangers by methods covered by other subclasses B21D53/02)}
- F28D 1/022: {for immersion in a natural body of water, e.g. marine radiators}
- F28F 1/36: the means being helically wound fins or wire spirals
- F28D 2021/0094: {for recooling the engine coolant}
- Y10T 29/49378: Finned tube
- B23P: METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS (arrangements for copying or controlling B23Q)
- F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general)
- F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A heat exchanger includes a tubular portion configured to carry a first heat exchange medium and a finned portion coupled to the tubular portion. The tubular portion includes a tube and a coating disposed on the tube. The finned portion includes a fin strip disposed in a groove formed in the coating to secure the fin to the tube portion.

## Claims

### Claim 1

A heat exchanger comprising:
a tubular portion configured to carry a first heat exchange medium, said tubular portion comprising a tube and a coating disposed on said tube; and
a finned portion coupled to said tubular portion, said finned portion comprising a fin strip disposed in a groove formed in said coating.

### Claim 2 (depends on 1)

A heat exchanger according to claim 1, wherein said groove is helical and said finned portion is helically disposed about said tubular portion.

### Claim 3 (depends on 1)

A heat exchanger according to claim 1, wherein said coating is disposed on an exterior surface of said tube.

### Claim 4 (depends on 1)

A heat exchanger according to claim 1, wherein said groove is deformed, providing an interference fit between said fin strip and said coating, securing said fin strip in said groove.

### Claim 5 (depends on 1)

A heat exchanger according to claim 1, wherein said finned portion comprises aluminum.

### Claim 6 (depends on 1)

A heat exchanger according to claim 1, wherein said coating comprises aluminum, said tube comprises steel, and said finned portion comprises aluminum.

### Claim 7

A method of forming a heat exchanger comprising:
applying a coating to a tube;
forming a groove in said coating;
inserting a fin strip in said groove; and
deforming said groove to provide an interference fit between said fin strip and said coating to secure said fin strip in said groove.

### Claim 8 (depends on 7)

A method according to claim 7, wherein said applying a coating comprises spraying.

### Claim 9 (depends on 7)

A method according to claim 7, wherein said forming said groove comprises machining.

### Claim 10 (depends on 7)

A method according to claim 7, wherein said deforming said groove comprises rolling said coating.

### Claim 11 (depends on 7)

A method according to claim 7, further comprising cleaning said tube using abrasive blasting.

### Claim 12 (depends on 7)

A method according to claim 7, wherein said groove is helical.

### Claim 13 (depends on 7)

A method according to claim 7, wherein said coating comprises aluminum, said tube comprises steel, and said fin strip comprises aluminum.

### Claim 14

A heat exchanger assembly comprising:
a housing; and
a heat exchanger coupled to said housing, said heat exchanger comprising:
a tubular portion configured to carry a first heat exchange medium, said
tubular portion comprising a tube and a coating disposed on said tube; and
a finned portion comprising a fin strip disposed in a groove formed in said coating.

### Claim 15 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said housing defines an interior volume configured to carry a second heat exchange medium and said heat exchanger is disposed within said interior volume.

### Claim 16 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said groove is helical and said finned portion is helically disposed about said tubular portion.

### Claim 17 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said coating is disposed on an exterior surface of said tube.

### Claim 18 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said groove is deformed, providing an interference fit between said fin strip and said coating, securing said fin strip in said groove.

### Claim 19 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said finned portion comprises aluminum.

### Claim 20 (depends on 14)

A heat exchanger assembly according to claim 14, wherein said coating comprises aluminum, said tube comprises steel, and said finned portion comprises aluminum.