Patent US4054239A successfully refreshed from Google Patents.
US4054239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fabricating a heat exchanger
Assignee: Carrier Corp
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Filing: 1976-03-31
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Granted: 1977-10-18
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Expires: 1996-03-31
Abstract
Abstract An ultrasonic dip soldering process for bonding the tubular joints of a heat exchanger made up of tubular components joined together to form flow circuits within a fan coil. The joints are positioned adjacent to one of the tube sheets of the fan coil structure and the joints preheated by means of a remote heating process. The joints are then immersed in a molten bath of solder and treated to ultrasonic energy while in the bath.
Inventors
- 👤 James J. Watson, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:01
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/08; B23K1/0008; B23K1/0012; B23K2101/00; B23K2101/04; B23K2101/14; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49373
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
159 words
In the fabrication of a heat exchanger wherein a number of tubular components are joined together to form flow circuits within a fan coil, the process of joining the components comprising providing telescoped socket joints between the tubular components positioned adjacent to at least one tube sheet of the fan coil, directing a high speed jet of flammable gas at the tube sheet whereby the jet is redirected by the tube sheet to form a blanket of gas about the outside of the tubular joints, maintaining the speed of the jet traveling between its source and the tube sheet at a velocity sufficient to prevent the gas from mixing with ambient air and thus being ignited, igniting the blanket formed at the tube sheet to heat the joints within the blanket region to a predetermined temperature, immersing the preheated joints in a bath of liquid solder, and exposing the bath to ultrasonic energy while the joints are immersed therein.
Claim 2
Dependent Claim
159 words
In the fabrication of a heat exchanger wherein a number of tubular components are joined together to form flow circuits within a fan coil, the process of joining the components comprising providing telescoped socket joints between the tubular components positioned adjacent to at least one tube sheet of the fan coil, directing a high speed jet of flammable gas at the tube sheet whereby the jet is redirected by the tube sheet to form a blanket of gas about the outside of the tubular joints, maintaining the speed of the jet traveling between its source and the tube sheet at a velocity sufficient to prevent the gas from mixing with ambient air and thus being ignited, igniting the blanket formed at the tube sheet to heat the joints within the blanket region to a predetermined temperature, immersing the preheated joints in a bath of liquid solder, and exposing the bath to ultrasonic energy while the joints are immersed therein.
Claim 3
Dependent Claim
36 words
The method of claim 1 including the step of moving the source of the gas stream in regard to the tube sheet so as to establish an extended blanket of gas within the tubular joint region.
Claim 4
Dependent Claim
18 words
The process of claim 1 wherein a plurality of high speed jets are directed at the tube sheet.
Claim 5
Dependent Claim
21 words
The process of claim 1 wherein the joints are removed from the bath of molten solder and permitted to air cool.
Claim 6
Dependent Claim
26 words
The process of claim 1 wherein the temperature and geometry of the blanket is regulated by controlling the quantity of gas directed at the tube sheet.
Claim 7
Dependent Claim
27 words
The process of claim 1 wherein the temperature and geometry of the blanket is regulated by controlling the impact angle of the jet against the tube sheet.
Claim 8
Dependent Claim
30 words
The process of claim 1 whereby the temperature and geometry of the blanket is controlled by regulating the distance traveled by the jet between its source and the tube sheet.
Claim 9
Dependent Claim
30 words
The process of claim 1 wherein the height of the blanket above the tube sheet is controlled by regulating the velocity of the gas stream directed at the tube sheet.
Claim 10
Dependent Claim
36 words
The method of claim 1 further including the steps of sensing the temperature of the tubular joints within the blanket region, and regulating the flow of gas into the blanket in response to the temperature sensed.
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) | 1980-10-17 | 1981-04-18 | 1981-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-17 | 1985-04-18 | 1985-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-17 | 1989-04-18 | 1989-10-18 | $7700.00 | Window Closed / Lapsed |