Patent US3857164A successfully refreshed from Google Patents.
US3857164A
Expired / Lapsed
US
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Method for brazing radiators made of aluminum
Assignee: SA Des Ueines Chausson fr
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Filing: 1972-08-04
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Granted: 1974-12-31
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Expires: 1992-08-04
Abstract
Abstract A part to be assembled is maintained applied by an edge having a continuous contact line with another part to manage a capillary interval, a liquid flux is deposited only on the outer side of the parts so that the flux wets only a very small height of the inner wall, the aqueous support of the flux is evaporated, then heating is performed up to the melting temperature to melt the brazing film which is drawn up through capillary action only by the flux wet portions.
Inventors
- 👤 A Chartet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:35
CPC Classifications
B; B21; B21D; B21D53/00; B21D53/02; B21D53/08; B23; B23K; B23K1/00; B23K1/0008; B23K1/0012; F; F28; F28F; F28F9/00; F28F9/02; F28F9/0219; F28F9/0224; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4935; Y10T29/49393
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
261 words
A method for brazing radiators made of aluminum of which the parts are at least partly covered with a brazing film, comprising the steps of shaping the parts, providing said parts with contacting portions along the brazed junction to be made, said contacting portions comprising a substantially flat surface of one of the parts and a substantially linear portion of the other part, assembling the parts in relationship for which the contacting portions are substantially T-assembled in crosssection thus delimiting between said parts a continuous capillary passageway the width of which corresponds substantially to said linear portion, depositing a liquid flux only on the outside of the assembled parts whereby said flux is drawn through said continuous capillary passageway and in the vicinity thereof and wets only through capillary action a very small inner portion of said parts in the vicinity of said capillary passageway within the assembled parts, dehydrating the flux, heating the radiator to the melting temperature of the flux, whereby said parts are fluxed only on said portions wet by said flux, and comprising the further step of delimiting on said parts in the immediate vicinity of the brazed connections to be made narrow canals defined by the outer walls of the parts, whereby capillary housings are delimited to draw up and retain both the flux and the brazing material to be supplied to said capillary passageway, continuing heating the parts to melting temperature of the brazing film whereby the resulting liquid brazing material is drawn up only in the capillary passageways and portions wet with the flux.
Claim 2
Independent Claim
261 words
A method for brazing radiators made of aluminum of which the parts are at least partly covered with a brazing film, comprising the steps of shaping the parts, providing said parts with contacting portions along the brazed junction to be made, said contacting portions comprising a substantially flat surface of one of the parts and a substantially linear portion of the other part, assembling the parts in relationship for which the contacting portions are substantially T-assembled in crosssection thus delimiting between said parts a continuous capillary passageway the width of which corresponds substantially to said linear portion, depositing a liquid flux only on the outside of the assembled parts whereby said flux is drawn through said continuous capillary passageway and in the vicinity thereof and wets only through capillary action a very small inner portion of said parts in the vicinity of said capillary passageway within the assembled parts, dehydrating the flux, heating the radiator to the melting temperature of the flux, whereby said parts are fluxed only on said portions wet by said flux, and comprising the further step of delimiting on said parts in the immediate vicinity of the brazed connections to be made narrow canals defined by the outer walls of the parts, whereby capillary housings are delimited to draw up and retain both the flux and the brazing material to be supplied to said capillary passageway, continuing heating the parts to melting temperature of the brazing film whereby the resulting liquid brazing material is drawn up only in the capillary passageways and portions wet with the flux.
Claim 3
Dependent Claim
50 words
Method for brazing radiators made of aluminum, as set forth in claim 1, wherein the parts are constituted by header-boxes and tube plates of a radiator and both steps of fluxing and brazing are made while the radiator is maintained in a position for which the header-boxes are vertically disposed.
Claim 4
Dependent Claim
63 words
Method as set forth in claim 1, comprising the further step of delimiting protruding members from said part delimiting the substantially flat surface, said protruding members being caused to bear against the outer wall of said part delimiting the substantially linear portion whereby said latter part is centered with respect to the other part thus causing said housing to be of uniform thickness.
Claim 5
Dependent Claim
84 words
Method as set forth in claim 1, comprising the further step of delimiting protruding members from said part delimiting the substantially flat surface, said protruding members being caused to bear against the outer wall of said part delimiting the substantially linear portion, and said protruding members further delimiting partitions extending transversally through said housings whereby said protruding members act both as centering members for said parts and dividers for said housings thus divided in successive collecting chambers for said flux and melted brazing material.
Claim 6
Independent Claim
233 words
A method for brazing radiators made of aluminum of which the parts are at least partly covered with a brazing film, comprising the steps of shaping the parts, providing said parts with contacting portions along the brazed junction to be made, said contacting portions comprising a substantially flat surface of one of the parts and a substantially linear portion of the other part, assembling the parts in relationship for which the contacting portions are substantially T-assembled in cross-section thus delimiting between said parts a continuous capillary passageway the width of which corresponds substantially to said linear portion, depositing a liquid flux only on the outside of the assembled parts whereby said flux is drawn through said continuous capillary passageway and in the vicinity thereof and wets only through capillary action a very small inner portion of said parts in the vicinity of said capillary passageway within the assembled parts, dehydrating the flux, heating the radiators to the melting temperature of the flux, whereby said parts are fluxed only on said portions wet by said flux, continuing heating the parts to melting temperature of the brazing film whereby the resulting liquid brazing material is drawn up only in the capillary passageways and portions wet with the flux, and comprising the further step of eliminating the brazing film covering one of the parts in the area thereof where the brazed connection is to be made.
Claim 7
Independent Claim
233 words
A method for brazing radiators made of aluminum of which the parts are at least partly covered with a brazing film, comprising the steps of shaping the parts, providing said parts with contacting portions along the brazed junction to be made, said contacting portions comprising a substantially flat surface of one of the parts and a substantially linear portion of the other part, assembling the parts in relationship for which the contacting portions are substantially T-assembled in cross-section thus delimiting between said parts a continuous capillary passageway the width of which corresponds substantially to said linear portion, depositing a liquid flux only on the outside of the assembled parts whereby said flux is drawn through said continuous capillary passageway and in the vicinity thereof and wets only through capillary action a very small inner portion of said parts in the vicinity of said capillary passageway within the assembled parts, dehydrating the flux, heating the radiators to the melting temperature of the flux, whereby said parts are fluxed only on said portions wet by said flux, continuing heating the parts to melting temperature of the brazing film whereby the resulting liquid brazing material is drawn up only in the capillary passageways and portions wet with the flux, and comprising the further step of eliminating the brazing film covering one of the parts in the area thereof where the brazed connection is to be made.
Claim 8
Dependent Claim
50 words
Method for brazing radiators made of aluminum, as set forth in claim 5, wherein the parts are constituted by header-boxes and tube plates of a radiator and both steps of fluxing and brazing are made while the radiator is maintained in a position for which the header-boxes are vertically disposed.
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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) | 1977-12-30 | 1978-07-01 | 1978-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-30 | 1982-07-01 | 1982-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-30 | 1986-07-01 | 1986-12-31 | $7700.00 | Window Closed / Lapsed |