US3754109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing press particularly for brazing a pressing including curved portions to a matching plate
Assignee: SOC TRAITEMENTS ELECTROLYTIQUES ELECTROTHERMIQUES FR
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Filing: 1972-08-16
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Granted: 1973-08-21
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Expires: 1992-08-16
Abstract
Abstract Brazing press for joining pressings having a bottom and a sidewall and curved portions connecting the former two, such as bottoms of shaped cooking utensils, pots or pans, to a matching heat diffuser plate of a heat conducting metal covering at least part of the curved portions. Such a press includes : a main inductor ; a ferromagnetic susceptor device interposed between the inductor and the diffuser plate for heating said latter and including a flat central portion and an annular peripheral portion matching the outer edge of the diffuser plate ; a supplementary inductor for heating the annular susceptor portion and means for exerting pressure on the edge of the sidewall to make the curved portions bulge so as to flatten them against the matching portions of the diffuser plate during the brazing operation.
Inventors
- 👤 J Moulin
- 👤 B Dallet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:07
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/002
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
212 words
Brazing press for joining a pressing having a flat bottom, a sidewall symmetrical about an axis and curved portions linking said bottom to said sidewall, to a preformed component called diffuser plate which is to cover said bottom and at least a part of said curved portions, said press comprising: a fixed frame; at least one press jack supported by said frame; mandrel means for supporting said pressing, essentially coaxial with said sidewall thereof; a block containing main inductor means located above and coaxially with said mandrel means, said block and said mandrel means being respectively coupled to said frame and to one of said jacks; intermediate heating means of a ferromagnetic material, called susceptor, interposed between said block and said diffuser plate and including: a central flat portion heated by said inductor means, and a peripheral annular portion whose internal face is arranged to match the form of the external face of the edge portion of said diffuser plate; supplementary inductor means for heating said annular susceptor portion and surrounding said latter; and means for exerting pressure on the edges of said pressing sidewall so as to make its curved portions bulge for pressing them against the edge portion of said diffuser plate which is non-deformably supported by said susceptor means.
Claim 2
Dependent Claim
212 words
Brazing press for joining a pressing having a flat bottom, a sidewall symmetrical about an axis and curved portions linking said bottom to said sidewall, to a preformed component called diffuser plate which is to cover said bottom and at least a part of said curved portions, said press comprising: a fixed frame; at least one press jack supported by said frame; mandrel means for supporting said pressing, essentially coaxial with said sidewall thereof; a block containing main inductor means located above and coaxially with said mandrel means, said block and said mandrel means being respectively coupled to said frame and to one of said jacks; intermediate heating means of a ferromagnetic material, called susceptor, interposed between said block and said diffuser plate and including: a central flat portion heated by said inductor means, and a peripheral annular portion whose internal face is arranged to match the form of the external face of the edge portion of said diffuser plate; supplementary inductor means for heating said annular susceptor portion and surrounding said latter; and means for exerting pressure on the edges of said pressing sidewall so as to make its curved portions bulge for pressing them against the edge portion of said diffuser plate which is non-deformably supported by said susceptor means.
Claim 3
Dependent Claim
63 words
Press as claimed in claim 1, wherein said susceptor means are composed of two separate parts and comprise: a first flat, plate-shaped part making up said central portion; and a second, annular, peripheral part whose lower face matches the shape of the external face of the raised edge portion of said diffuser plate and whose topface is flat, making up said peripheral portion.
Claim 4
Dependent Claim
80 words
Press as claimed in claim 1, of the type including a single press jack, wherein said means for exerting pressure comprise: first elastic means supported integrally with said mandrel means and arranged around said latter; and a movable first annular component surrounding said mandrel means and carried by said first elastic means for displacement in parallel to said axis, whereby the top face of said first annular component comes into contact with said sidewall edges for exerting said pressure thereon.
Claim 5
Dependent Claim
21 words
Press as claimed in claim 3, wherein said first elastic means comprise a set of coil-springs disposed symmetrically about said axis.
Claim 6
Dependent Claim
27 words
Press as claimed in claim 3, wherein said first elastic means comprise a single helical spring surrounding said mandrel means and disposed substantially coaxially with said axis.
Claim 7
Dependent Claim
88 words
Press as claimed in claim 3 wherein said mandrel means comprises: a bottom part fixed in relation to said jack; second elastic means carried by said bottom part; and a top part axiaLly movable in relation to said bottom part and supported by said second elastic means, said mobile top part carrying the pressing by its bottom, whereby said mobile annular component carried by said first elastic means exerts a pressure on the edge of said sidewall, whilst said top part exerts a pressure upon said pressing bottom.
Claim 8
Dependent Claim
39 words
Press as claimed in claim 6, wherein said second elastic means comprise a single helical spring whose diameter is less than that of the mandrel and which is disposed substantially coaxially thereto and is carried by said bottom part.
Claim 9
Dependent Claim
47 words
Press as claimed in claim 6, wherein said second elastic means comprises a set of coil-springs disposed symmetrically in relation to the axis of said mandrel means on a pitched circle of diameter less than that of said mandrel means, and carried by the bottom part thereof.
Claim 10
Dependent Claim
121 words
Press as claimed in claim 1 of the type including a single jack, wherein said mandrel means comprises: a bottom part fixed in relation to said jack; second elastic means supported by said bottom part; a top part axially movable in relation to said bottom part and carried by said second elastic means, said top part supporting the pressing by its base; and wherein said pressure exerting means comprises: a second annular component integral with said bottom part and having a diameter larger than that of the edges of said sidewall, whereby the top face of said second annular component comes into contact with said sidewall edges for exerting said pressure thereon, whilst said top part presses against said pressing bottom.
Claim 11
Dependent Claim
95 words
Press as claimed in claim 1, of the double-acting type, comprising first and second jacks the first of which is coupled either to the mandrel or to the inductor block, wherein said pressure exerting means comprise a cylindrical tube-shaped component surrounding and coaxial with said mandrel means and having a mean diameter approximately equal to that of said sidewall, and a thickness greater than the latter, said tubular component being mechanically coupled to said second jack so as to exert a thrust on the edges of said sidewall in the direction of said pressing bottom.
Claim 12
Dependent Claim
22 words
Press as claimed in claim 10, wherein said second jack is operated with a predetermined delay in relation to the first jack.
Claim 13
Dependent Claim
25 words
Press as claimed in claim 11, wherein said second jack is operated as soon as said first one arrives at the end of its travel.
Claim 14
Dependent Claim
45 words
Press as claimed in claim 1, wherein said supplementary inductor means surrounding the annular peripheral portion of the susceptor comprises a conductor of rectangular cross-section and a tube of circular section integrally joined to the exterior of said rectangular conductor for passing a cooling fluid.
Claim 15
Dependent Claim
20 words
Press as claimed in claim 1 characterized in that said supplementary inductor takes the form of a rectangular section tube.
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) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |