US3885839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic bearing
Assignee: Societe Europeenne de Propulsion SEP SA
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Filing: 1973-08-20
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Granted: 1975-05-27
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Expires: 1993-08-20
Abstract
Abstract A magnetic bearing in which a magnetic body is suspended in the air gap between the rotor and the stator for movement perpendicular to the flux path across the gap. Friction restrains such movement of the magnetic body relative to the stator. The bearing is advantageous for use in an ultracentrifuge.
Inventors
- 👤 Helmut Habermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:37
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/044; B; B04; B04B; B04B9/00; B04B9/14; F16C27/00; F16C32/0474; F16C32/0476; F16F; F16F15/00; F16F15/10; F16F15/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
96 words
A magNetic bearing comprising stator means, a rotor, air gap means between said stator means and rotor, means for creating magnetic flux linking the rotor and stator means across said air gap means, at least one magnetic body, means mounting said body in said air gap means for movement relative to said stator means and the rotor in a radial direction at least approximately perpendicular to the flux path across the air gap means, and friction means positioned between the said body and said stator means for resisting displacement of said body along said radial direction.
Claim 2
Dependent Claim
96 words
A magNetic bearing comprising stator means, a rotor, air gap means between said stator means and rotor, means for creating magnetic flux linking the rotor and stator means across said air gap means, at least one magnetic body, means mounting said body in said air gap means for movement relative to said stator means and the rotor in a radial direction at least approximately perpendicular to the flux path across the air gap means, and friction means positioned between the said body and said stator means for resisting displacement of said body along said radial direction.
Claim 3
Dependent Claim
26 words
A bearing as set forth in claim 1, wherein said magnetic body comprises a circular ring located in the flux path across said air gap means.
Claim 4
Dependent Claim
68 words
A bearing as set forth in claim 2, wherein said air gap means comprise a number of concentric annular air gaps where said number is greater than unity, and said circular ring comprises the same number of coaxial circular ring members one being disposed in each of the air gaps between the rotor and the stator means and wherein spacer means are provided between adjacent coaxial ring members.
Claim 5
Dependent Claim
55 words
A bearing as set forth in claim 1 wherein said stator means comprise a frame and a magnetic core secured to said frame, and the magnetic body mounting means comprises suspension means consisting of at least one of the group comprising thread, piano wire and springs and connected between said magnetic body and said frame.
Claim 6
Dependent Claim
37 words
A bearing as set forth in claim 1, wherein said friction means between said stator means and said magnetic body comprise a viscous medium held by capillary action between said magnetic body and the said stator means.
Claim 7
Dependent Claim
35 words
A bearing as set forth in claim 1, wherein said friction means between said stator means and the magnetic body comprise interengaging means on said stator means and said mounting means for said magnetic body.
Claim 8
Dependent Claim
40 words
A bearing as set forth in claim 6, wherein said stator means comprise a frame and a magnetic core secured to said frame and said interengaging means comprise friction members carried by said mounting means and engageable with said frame.
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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |