Patent US4765756A successfully refreshed from Google Patents.
US4765756A
Expired / Lapsed
US
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Rolling bearing
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1987-04-16
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Granted: 1988-08-23
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Expires: 2007-04-16
Abstract
Abstract A rolling bearing comprising an outer race and an inner race situated coaxially therein both races defining an annular space therebetween and a row of rolling members in the annular space between the races, and generally annular ring seals, having inwardly directed sides and inner and outer peripheral areas, for sealing off from the surroundings, on either side of the rolling members, the annular space between the races wherein a lubricant is present, wherein the inwardly directed sides of the sealing rings is formed with at least one cavity containing a fluid magnetic lubricant, and a magnetic forming magnetic fields, the poles of which fields are located on either side of the cavity, near the races.
Inventors
- 👤 Antonio Gabelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:13
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; F16J15/43; F16C; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/664; F16C33/6644; F16C33/6655; F16C33/72; F16C33/76; F16C33/762; F16C33/763; F16C33/765; F16C33/78; F16C33/7896; F16C19/00; F16C19/02; F16C19/04; F16C19/06; F16C2300/00; F16C2300/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
126 words
A rolling bearing comprising at least one outer race and at least one inner race situated coaxially therein both races defining an annular space therebetween and at least one row of rolling members situated in the annular space between the races, and generally annular ring seals, having inwardly directed sides and inner and outer peripheral areas, for sealing off from the surroundings, on either side of the rolling members, the annular space between the races wherein a lubricant is present, wherein the inwardly directed sides of the sealing rings being formed with at least one cavity containing a fluid magnetic lubricant, and magnetic means forming magnetic fields, the poles of which fields are located on either side of said at least one cavity, near the races.
Claim 2
Dependent Claim
126 words
A rolling bearing comprising at least one outer race and at least one inner race situated coaxially therein both races defining an annular space therebetween and at least one row of rolling members situated in the annular space between the races, and generally annular ring seals, having inwardly directed sides and inner and outer peripheral areas, for sealing off from the surroundings, on either side of the rolling members, the annular space between the races wherein a lubricant is present, wherein the inwardly directed sides of the sealing rings being formed with at least one cavity containing a fluid magnetic lubricant, and magnetic means forming magnetic fields, the poles of which fields are located on either side of said at least one cavity, near the races.
Claim 3
Dependent Claim
39 words
A rolling bearing according to claim 1, wherein the sealing rings are designed as magnets forming the magnetic fields, of which one pole is situated in the inner peripheral area and the other pole in the outer peripheral area.
Claim 4
Dependent Claim
50 words
A rolling bearings according to claim 1 or 2, wherein at least one of the sealing rings has attached a sealing member having a sealing lip and behind said lip, between the sealing ring and the race which faces said lip, there is present a quantity of sealing magnetic fluid.
Claim 5
Dependent Claim
29 words
A rolling bearing according to claim 1, further including a plurality of cavities containing a fluid magnetic lubricant are formed in the inwardly directed sides of the sealing rings.
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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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |