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US4340260A Expired / Lapsed US ⏱️ 0.0 years remaining

Magnetic suspension bearing

Assignee: Siemens AG
•
Filing: 1980-09-05
•
Granted: 1982-07-20
•
Expires: 2000-09-05
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Abstract

Abstract A magnetic suspension bearing for a rotating body having at least two magnet systems of coaxial permanent magnets arranged sequentially along the axis of rotation of the rotating body. Each magnet system is provided with two permanent magnets disposed on the rotating body and a stator, respectively. Each such permanent magnet is magnetized in a direction perpendicular to a major external surface, the adjacent surfaces of the magnets within a magnet system being of like polarity so as to repel one another. Each of the magnets is constructed so as to form a truncated cone, the axis of which coincides with an axis of rotation of the rotating body. In one embodiment, the apex of the cones are directed towards one another. The apex angle of the cones is advantageously preselected to provide desired axial and orthogonal components of force.

Inventors

  • 👤 Helmut Forster
  • 👤 Paul Hini
  • 👤 Gerd Stransky

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 04:01
CPC Classifications
G; G01; G01R; G01R11/00; G01R11/02; G01R11/12; G01R11/14; F; F16; F16C; F16C32/00; F16C32/04; F16C32/0406; F16C32/0408; F16C32/0423; F16C32/0429; F16C32/044; F16C32/0444; F16C39/00; F16C39/06; F16C39/063

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 108 words
A magnetic suspension bearing for a rotating body having an axis of rotation, the bearing having at least first and second magnet systems which are arranged sequentially along the axis of rotation, each magnet system having two annular, coaxially arranged, permanent magnets which are magnetically poled so as to repel one another, one permanent magnet of each magnet system being affixed to the rotating body, and the other to a stator, the magnetic suspension bearing being CHARACTERIZED IN THAT the permanent magnets are each provided with a pole surface which forms a truncated cone having an axis which coincides with the axis of rotation of the rotating body.
Claim 2
Dependent Claim 108 words
A magnetic suspension bearing for a rotating body having an axis of rotation, the bearing having at least first and second magnet systems which are arranged sequentially along the axis of rotation, each magnet system having two annular, coaxially arranged, permanent magnets which are magnetically poled so as to repel one another, one permanent magnet of each magnet system being affixed to the rotating body, and the other to a stator, the magnetic suspension bearing being CHARACTERIZED IN THAT the permanent magnets are each provided with a pole surface which forms a truncated cone having an axis which coincides with the axis of rotation of the rotating body.
Claim 3
Dependent Claim 52 words
The magnetic suspension bearing of claim 1 wherein said pole surfaces of the permanent magnets of the first magnet system have an angle of inclination with respect to the axis of rotation which differs from an angle of inclination of said pole surfaces of the permanent magnets of the second magnet system.
Claim 4
Dependent Claim 67 words
The magnetic suspension bearing of claim 1 wherein the permanent magnets of each of the first and second magnet systems are separated by respective air gaps and there is further provided a spacer of non-magnetic material disposed in said air gap of a selected one of the first and second magnet systems, said spacer being affixed to one of the permanent magnets of said selected magnet system.
Claim 5
Dependent Claim 52 words
The magnetic suspension bearing of claim 4 wherein said spacer is affixed to one of the pole surfaces of the permanent magnets of said selected one of the first and second magnet systems, and the other pole surface of said selected magnet system is provided with a covering of a non-magnetic material.

References Cited (Backward Citations)

CH391091A Cited
DE1472413A1 Cited
US3899223A Cited
DE2134424A1 Cited
US3888553A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1985-07-19 1986-01-18 1986-07-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1989-07-19 1990-01-18 1990-07-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1993-07-19 1994-01-18 1994-07-20 $7700.00 Window Closed / Lapsed

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