US4970422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device with a thrust bearing
Assignee: SKF Nova AB
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Filing: 1989-08-08
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Granted: 1990-11-13
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Expires: 2009-08-08
Abstract
Abstract A rotatable element is arranged on a supporting member. The element is freely rotatable and displaceable radially by being held in position by two portions attracting each other, said portions being made of magnetic material, and that a plane slot separates the supporting member and the element. The driving of the element can be effected thereby that the element forms or incorporates a rotor in an electromotor, the stator of which is arranged in an area of the supporting member.
Inventors
- 👤 Bjorn Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:44
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0603; F16C32/0614; F16C32/0618; F16C25/00; F16C25/02; F16C25/04; F16C25/045; F16C32/0681; F16C32/0692; F16C2340/00; F16C2340/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
322 words
A bearing mechanism, comprising: supporting member having an axially spaced planar support surface; a rotatable element with an axis of rotation and being rotatably carried by said supporting member and having an axially spaced planar rotatable surface, said support surface and rotatable surface being confronting and defining a space therebetween; power means for maintaining a force equilibrium between said supporting member and said rotatable element, said power means including a first magnetic material in the confronting surface of said supporting member and arranged along the rotational axis of said rotatable element, said power means further including a second magnetic material in the confronting surface of said rotatable element and arranged along the rotational axis thereof, said first and second magnetic materials having opposite polarities to cause a force of mutual attraction; said power means further including pressure directing means for directing a pressure medium into said space between said confronting surfaces, said pressure medium operating against said force of mutual attraction of said first and second magnetic materials; an electric drive motor having a stator and a rotor, said stator being mounted in said supporting member in proximity to said confronting support surface, and said rotor forming at least a portion of said rotatable confronting element and being positioned to rotate about said rotatable element, said rotatable elements having a dynamic mass center about said rotational axis to thereby balance said rotatable element, reduce vibration and counteract any tendency of said element and rotor to tilt; said stator including a gas permeable portion radially centered about said axis and connected to said pressure directing means for directing said pressure medium against said rotor, said stator further including an axially centered recess and stator windings enclosed by said recess; and centering means located at a plurality of equidistant about the periphery of said rotatable element for contact with said element during rotation to limit movement of said rotatable element away from said axis.
Claim 2
Dependent Claim
322 words
A bearing mechanism, comprising: supporting member having an axially spaced planar support surface; a rotatable element with an axis of rotation and being rotatably carried by said supporting member and having an axially spaced planar rotatable surface, said support surface and rotatable surface being confronting and defining a space therebetween; power means for maintaining a force equilibrium between said supporting member and said rotatable element, said power means including a first magnetic material in the confronting surface of said supporting member and arranged along the rotational axis of said rotatable element, said power means further including a second magnetic material in the confronting surface of said rotatable element and arranged along the rotational axis thereof, said first and second magnetic materials having opposite polarities to cause a force of mutual attraction; said power means further including pressure directing means for directing a pressure medium into said space between said confronting surfaces, said pressure medium operating against said force of mutual attraction of said first and second magnetic materials; an electric drive motor having a stator and a rotor, said stator being mounted in said supporting member in proximity to said confronting support surface, and said rotor forming at least a portion of said rotatable confronting element and being positioned to rotate about said rotatable element, said rotatable elements having a dynamic mass center about said rotational axis to thereby balance said rotatable element, reduce vibration and counteract any tendency of said element and rotor to tilt; said stator including a gas permeable portion radially centered about said axis and connected to said pressure directing means for directing said pressure medium against said rotor, said stator further including an axially centered recess and stator windings enclosed by said recess; and centering means located at a plurality of equidistant about the periphery of said rotatable element for contact with said element during rotation to limit movement of said rotatable element away from said axis.
Claim 3
Dependent Claim
305 words
A bearing mechanism, comprising: a supporting member having an axially spaced planar support surface; a rotatable element with an axis of rotation and being rotatably carried by said supporting member and having an axially spaced rotatable surface, said support surface and rotatable surface being confronting and defining a space there between; power means for maintaing a force equilibrium between said supporting member and said rotatable element, said power means including a first magnetic material in the confronting surface of said supporting member and arranged along the rotational axis of said rotatable element, said power means further including a second magentic material in the confronting surface of said rotatable element and arranged along the rotational axis thereof, said first and second magnetic materials having opposite polarities to cause a force of mutual attraction; said power means further including pressure directing means for directing a pressure medium into said space between said confronting surfaces, said pressure medium operating against said force of mutual attraction of said first and second magnetic materials; an electric drive motor having a stator and a rotor, said stator being mounted in said supporting member in proximity to said confronting support surface, and said rotor forming at least a portion of said rotatable element having a dynamic mass centered about said rotational axis to thereby balance said rotatable element, reduce vibration and conteract any tendency of said element and rotor to tilt; said stator including a gas permeable portion radially centered about said axis and connected to said pressure directing means for directing said pressure medium against said rotor, said stator further including an axially centered recess and stator windings enclosed by said recess; and the geometric structure of the motor and magnetic material permitting free displacement of the rotor in a truly radial direction to facilitate replacement of the rotor when desired.
Claim 4
Dependent Claim
305 words
A bearing mechanism, comprising: a supporting member having an axially spaced planar support surface; a rotatable element with an axis of rotation and being rotatably carried by said supporting member and having an axially spaced rotatable surface, said support surface and rotatable surface being confronting and defining a space there between; power means for maintaing a force equilibrium between said supporting member and said rotatable element, said power means including a first magnetic material in the confronting surface of said supporting member and arranged along the rotational axis of said rotatable element, said power means further including a second magentic material in the confronting surface of said rotatable element and arranged along the rotational axis thereof, said first and second magnetic materials having opposite polarities to cause a force of mutual attraction; said power means further including pressure directing means for directing a pressure medium into said space between said confronting surfaces, said pressure medium operating against said force of mutual attraction of said first and second magnetic materials; an electric drive motor having a stator and a rotor, said stator being mounted in said supporting member in proximity to said confronting support surface, and said rotor forming at least a portion of said rotatable element having a dynamic mass centered about said rotational axis to thereby balance said rotatable element, reduce vibration and conteract any tendency of said element and rotor to tilt; said stator including a gas permeable portion radially centered about said axis and connected to said pressure directing means for directing said pressure medium against said rotor, said stator further including an axially centered recess and stator windings enclosed by said recess; and the geometric structure of the motor and magnetic material permitting free displacement of the rotor in a truly radial direction to facilitate replacement of the rotor when desired.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-11-12 | 1994-05-14 | 1994-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-12 | 1998-05-14 | 1998-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-12 | 2002-05-14 | 2002-11-13 | $7700.00 | Window Closed / Lapsed |