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US4375372A
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Use of cubic rare earth-iron laves phase intermetallic compounds as magnetostrictive transducer materials
Assignee: United States Department of the Navy
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Filing: 1972-03-16
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Granted: 1983-03-01
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Expires: 1992-03-16
Abstract
Abstract A magnetostrictive device capable of large magnetostrictive strains is produced from RFe2 compounds wherein R is a rare earth element.
Inventors
- 👤 Norman C. Koon
- 👤 Albert I. Schindler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:49
CPC Classifications
C; C22; C22C; C22C28/00; H; H10; H10N; H10N35/00; H10N35/80; H10N35/85
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
85 words
A method of converting electromagnetic energy to mechanical energy which comprises subjecting a magnetostrictive compound represented by the formula R' x R".sub.(1-x) Fe 2 wherein R' and R" are different rare earth elements and are selected from the class consisting of holmium, erbium, and dysprosium and x ranges from 0 to 1, said compound being formed into a magnetostrictive device element, to a variation in magnetic field, whereby mechanical energy is produced in the form of a change in physical size of said magnetostrictive compound.
Claim 2
Independent Claim
85 words
A method of converting electromagnetic energy to mechanical energy which comprises subjecting a magnetostrictive compound represented by the formula R' x R".sub.(1-x) Fe 2 wherein R' and R" are different rare earth elements and are selected from the class consisting of holmium, erbium, and dysprosium and x ranges from 0 to 1, said compound being formed into a magnetostrictive device element, to a variation in magnetic field, whereby mechanical energy is produced in the form of a change in physical size of said magnetostrictive compound.
Claim 3
Dependent Claim
16 words
The method for converting electromagnetic energy to mechanical energy of claim 1 wherein x equals 1.
Claim 4
Dependent Claim
23 words
A magnetostrictive compound having the formula RFe 3 wherein R is a rare earth selected from the class consisting of holmium, erbium, dysprosium.
Claim 5
Dependent Claim
23 words
A magnetostrictive compound having the formula RFe 3 wherein R is a rare earth selected from the class consisting of holmium, erbium, dysprosium.
Claim 6
Dependent Claim
15 words
The magnetostrictive compound of claim 3 having the formula RFe 3 wherein R is dysprosium.
Claim 7
Dependent Claim
15 words
The magnetostrictive compound of claim 3 having the formula RFe 3 wherein R is holmium.
Claim 8
Dependent Claim
15 words
The magnetostrictive compound of claim 3 having the formula RFe 3 wherein R is erbium.
References Cited (Backward Citations)
US2829047A
Cited
GB752317A
Cited
US3102002A
Cited
US3421889A
Cited
US3424578A
Cited
US3582408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-02-28 | 1986-08-30 | 1987-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-02-28 | 1990-08-30 | 1991-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-02-28 | 1994-08-30 | 1995-03-01 | $7700.00 | Window Closed / Lapsed |