US4289549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin bonded permanent magnet composition
Assignee: Suwa Seikosha KK
•
Filing: 1979-10-23
•
Granted: 1981-09-15
•
Expires: 1999-10-23
Abstract
Abstract An improved magnetic material for a permanent magnet including at least 90 volume percent of a single phase of a samarium-transition metal alloy in a 2-17 molar ratio is provided. The alloy may be represented by the formula Sm 2 (Co Cu Fe M) 17 wherein M is at least one element selected from the group of manganese, silcon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdenum and aluminum.
Inventors
- 👤 Kazutomo Kasai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:41
CPC Classifications
C; C22; C22C; C22C30/00; C22C19/00; C22C19/07; H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/047; H01F1/053; H01F1/055
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
175 words
A resin-bonded permanent magnet composition comprising a permanent magnet composition of a single phase rare-earth R 2 (Co Cu Fe M) 17 alloy, wherein: the rare earth element is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent; copper is present in the alloy in an amount about equal to or greater than 2.5 and equal to or less than 13.0 weight percent, iron is present in an amount at least 15.0 and less than or equal to 39.0 weight percent; M is at least one element selected from the group consisting of manganese, silcon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent; the balance of the alloy being cobalt and including at least about 10 volume percent of a combining agent admixed with said composition, based on the total volume of the composition and combining agent.
Claim 2
Dependent Claim
175 words
A resin-bonded permanent magnet composition comprising a permanent magnet composition of a single phase rare-earth R 2 (Co Cu Fe M) 17 alloy, wherein: the rare earth element is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent; copper is present in the alloy in an amount about equal to or greater than 2.5 and equal to or less than 13.0 weight percent, iron is present in an amount at least 15.0 and less than or equal to 39.0 weight percent; M is at least one element selected from the group consisting of manganese, silcon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent; the balance of the alloy being cobalt and including at least about 10 volume percent of a combining agent admixed with said composition, based on the total volume of the composition and combining agent.
Claim 3
Dependent Claim
11 words
The composition of claim 1, wherein the rare-earth metal is samarium.
Claim 4
Dependent Claim
18 words
The composition of claim 1, wherein said combining agent is present between about 10 and 50 volume percent.
Claim 5
Dependent Claim
13 words
The composition of claim 3, wherein said combining agent is an epoxy resin.
Claim 6
Dependent Claim
13 words
The composition of claim 3, wherein said combining agent is a thermoplastic resin.
Claim 7
Dependent Claim
171 words
A resin-bonded permanent magnet ingot comprising a permanent magnet composition of a single phase Sm 2 (Co Cu Fe M) 17 alloy, wherein the samarium is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent; copper is present in the alloy in an amount about equal to or greater than 2.5% and equal to or less than 13.0 weight percent; iron is present in an amount greater than 18.0 and less than or equal to 39.0 weight percent; and M is at least one element selected from the group consisting of manganese, silicon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent, the balance of the alloy being cobalt, said permanent magnet composition compressed with at least 10% by volume of a combining agent, based on the volume of the composition and combining agent.
Claim 8
Dependent Claim
171 words
A resin-bonded permanent magnet ingot comprising a permanent magnet composition of a single phase Sm 2 (Co Cu Fe M) 17 alloy, wherein the samarium is present in the alloy in an amount about equal to or greater than 22.0 and less than 24.0 weight percent; copper is present in the alloy in an amount about equal to or greater than 2.5% and equal to or less than 13.0 weight percent; iron is present in an amount greater than 18.0 and less than or equal to 39.0 weight percent; and M is at least one element selected from the group consisting of manganese, silicon, titanium, niobium, zirconium, hafnium, tantalum, chromium, vanadium, molybdemium and aluminum and is present in the alloy in an amount about equal to or greater than 0.3 and less than or equal to 4.0 weight percent, the balance of the alloy being cobalt, said permanent magnet composition compressed with at least 10% by volume of a combining agent, based on the volume of the composition and combining agent.
Claim 9
Dependent Claim
29 words
The ingot of claim 6, wherein said combining agent is present between about 10 and 50 volume percent based on the total volume of the composition and combining agent.
Claim 10
Dependent Claim
13 words
The ingot of claim 6, wherein said combining agent is an epoxy resin.
Claim 11
Dependent Claim
13 words
The ingot of claim 7, wherein said combining agent is a thermoplastic resin.
References Cited (Backward Citations)
US3982971A
Cited
US4022701A
Cited
US4099995A
Cited
US4000982A
Cited
US4081297A
Cited
US4135953A
Cited
US4121952A
Cited
US4131495A
Cited
US4192696A
Cited
US4111823A
Cited
US4200547A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-09-14 | 1985-03-16 | 1985-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-14 | 1989-03-16 | 1989-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-14 | 1993-03-16 | 1993-09-15 | $7700.00 | Window Closed / Lapsed |