Patent US3923232A successfully refreshed from Google Patents.
US3923232A
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Method of bonding RECo{hd 5 {b magnets, apparatus for effecting the method and permanent magnets produced by the method
Assignee: UGIMAG RECOMA SA A CORP OF SWITZERLAND
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Filing: 1974-06-20
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Granted: 1975-12-02
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Expires: 1994-06-20
Abstract
Abstract Complex shaped permanent magnets are formed by braze bonding together at least two simpler shaped permanent magnets by applying a layer of a solder between the surfaces of said shaped permanent magnets intended to be joined, and heating the assembly to a temperature sufficient to cause melting of the solder, wherein said heating is effected in a non-oxidizing atmosphere.
Inventors
- 👤 Jaroslaw Houska
- 👤 Jan Strejcek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:51
CPC Classifications
B; B23; B23K; B23K1/00; B23K1/008; B23K1/0008; B23K1/0014; B23K1/19; B23K35/00; B23K35/001; B23K35/004; H; H01; H01F; H01F7/00; H01F7/02; H01F7/0205; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/4902; Y10T29/49075; Y10T29/49076; Y10T29/49078
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
61 words
A METHOD OF BRAZE BONDING TOGETHER AT LEAST TWO SHAPED PERMANENT MAGNETS WHEREIN SAID SHAPED PERMANENTS MAGNETS ARE FORMED OF AN ALLOY OF THE FORMULA RECO5 WHEREIN RE IS AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF RAREEARTH METALS, ALLOYS THEREOF AND MISCH METAL, WHICH COMPRISES: APPLYING A SOLDER FOIL OF A THICKNESS OF 10U TO 50U BETWEEN THE
Claim 2
Independent Claim
61 words
A METHOD OF BRAZE BONDING TOGETHER AT LEAST TWO SHAPED PERMANENT MAGNETS WHEREIN SAID SHAPED PERMANENTS MAGNETS ARE FORMED OF AN ALLOY OF THE FORMULA RECO5 WHEREIN RE IS AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF RAREEARTH METALS, ALLOYS THEREOF AND MISCH METAL, WHICH COMPRISES: APPLYING A SOLDER FOIL OF A THICKNESS OF 10U TO 50U BETWEEN THE
Claim 3
Dependent Claim
25 words
The method of claim 1, wherein said shaped permanent magnets of RECo5 are formed by sintering a powder of an alloy of the formula RECo5.
Claim 4
Dependent Claim
14 words
The method of claim 1, wherein said foil is composed of silver or copper.
Claim 5
Dependent Claim
37 words
The method of claim 3, wherein said foil is aligned between said shaped permanent magnets so that the edges of said foil extend at least 2 millimeters beyond the edges of said surfaces intended to be joined.
Claim 6
Dependent Claim
92 words
The method of claim 1, wherein a workpiece is formed by positioning at least two shaped permanent magnets on opposing sides of a solder foil, inserting said workpiece into a holder which is enclosed into a permeable crucible, introducing said crucible into a cooling zone of a furnaNce having a non-oxidizing atmosphere, passing said crucible into a heating zone which heats the contents of said crucible to no higher than the melting temperature of said solder foil and thereafter cooling said crucible in a second cooling zone which contains a non-oxidizing atmosphere.
Claim 7
Dependent Claim
45 words
The method of claim 1, wherein said shaped permanent magnets are formed by sintering a powder of an alloy of the formula RECo5 wherein RE is at least one metal selected from the group consisting of Ln, Cs, rare-earth metals, alloys thereof and misch metal.
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein said non-oxidizing atmosphere is an atmosphere of hydrogen, helium or argon.
Claim 9
Dependent Claim
12 words
The method of claim 1, wherein said non-oxidizing atmosphere is a vacuum.
Claim 10
Dependent Claim
25 words
The method of claim 1, wherein said melt temperature is between the melting temperature of said solder foil and 100*C lower than said melting temperature.
Claim 11
Dependent Claim
11 words
A permanent magnet assembly made by the method of claim 1.
References Cited (Backward Citations)
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US3188732A
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US3284891A
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US3271718A
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |