Patent US3582162A successfully refreshed from Google Patents.
US3582162A
Expired / Lapsed
US
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Temperature compensated permanent magnet bearing
Assignee: Max Baermann GmbH
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Filing: 1969-11-03
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Granted: 1971-06-01
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Expires: 1989-11-03
Abstract
Abstract A permanent magnet bearing having a bimetallic or fluid device for compensating for changes in the strength of the magnets due to variations in temperature by physically moving one or both of the magnets relative to a fixed reference. The magnetic bearing is intended for use with apparatus of the type having a fixed support member and a support member rotatable about an axis with respect to the fixed support member. One or both of the magnets have a temperature-responsive member disposed between the magnet and its associated supporting member and so constructed as to move the magnets toward or away from their supporting member in amounts proportional to the tendency for the spacing between the magnets to increase or decrease due to variations in their magnetic strength caused by temperature changes. This maintains the rotatable support member in a preselected axial position relative to the fixed support member.
Inventors
- 👤 Max Baermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:59
CPC Classifications
G; G04; G04B; G04B31/00; F; F16; F16C; F16C25/00; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/0423; F16C32/0427; F16C39/00; F16C39/06; F16C39/063; F16C2370/00; F16C32/0402
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
157 words
A permanent magnet bearing for sue with apparatus of the type including a fixed member and a member rotatable about an axis with respect thereto and having a preselected axial position, relative to said fixed member, comprising: a pair of permanent magnets; each of said magnets including a pole surface; said pole surfaces being opposed to one another and so magnetized as to bias said magnets into axial spaced-apart relationship to define an airgap therebetween; one of said magnets being associated with said fixed member and the other end of said magnets being connected to said rotatable member; and at least one nonmagnetic temperature-responsive means operatively associated with at least one of said magnets for axially displacing said magnet relative to its associated member according to the surrounding temperature to maintain said rotatable member substantially in said preselected axial position relative to said fixed member despite changes in the surrounding temperature and magnetic conditions of said magnets.
Claim 2
Dependent Claim
157 words
A permanent magnet bearing for sue with apparatus of the type including a fixed member and a member rotatable about an axis with respect thereto and having a preselected axial position, relative to said fixed member, comprising: a pair of permanent magnets; each of said magnets including a pole surface; said pole surfaces being opposed to one another and so magnetized as to bias said magnets into axial spaced-apart relationship to define an airgap therebetween; one of said magnets being associated with said fixed member and the other end of said magnets being connected to said rotatable member; and at least one nonmagnetic temperature-responsive means operatively associated with at least one of said magnets for axially displacing said magnet relative to its associated member according to the surrounding temperature to maintain said rotatable member substantially in said preselected axial position relative to said fixed member despite changes in the surrounding temperature and magnetic conditions of said magnets.
Claim 3
Dependent Claim
34 words
The permanent magnet bearing defined in claim 9, wherein said temperature-responsive means comprises a fluid, which fluid either expands or contracts upon temperature changes to displace the magnet with which it is operatively associated.
Claim 4
Dependent Claim
20 words
The permanent magnet bearing defined in claim 2, further including an elastic container, said fluid being carried in Said container.
Claim 5
Dependent Claim
16 words
The permanent magnet bearing defined in claim 9, wherein said temperature-responsive means comprises a bimetallic member
Claim 6
Dependent Claim
43 words
The permanent magnet bearing defined in claim 4, wherein said bimetallic member includes first and second portions, one of said portions having a relatively high coefficient of thermal expansion and the other of said portions having a relatively low coefficient of thermal expansion.
Claim 7
Dependent Claim
45 words
The permanent magnet bearing defined in claim 5, wherein said bimetallic member comprises a pair of concave discs, each of said discs having said first and second portions, said first portions including a concave metallic surface and said second portions including a convex metallic surface.
Claim 8
Dependent Claim
28 words
The permanent magnet bearing defined in claim 6, wherein said first portions are comprised of an iron-nickel alloy and said second portions are comprised of a manganese-copper-nickel alloy.
Claim 9
Dependent Claim
34 words
The permanent magnet bearing defined in claim 9, wherein at least one of said magnets is retained in a carrier body and said temperature-responsive means is disposed intermediate said carrier body and said magnet.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |