Patent US3754800A successfully refreshed from Google Patents.
US3754800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic bearing
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1972-01-17
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Granted: 1973-08-28
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Expires: 1992-01-17
Abstract
Abstract A hydrostatic bearing with two bearing surfaces which are movable relative to each other, characterized by a movable element, situated between these surfaces, which element is provided with two surfaces which together with the said bearing surfaces constitute two bearing gaps, one on each side of the intermediate element, and that the intermediate element, because of the friction occuring in the respective gaps when the first mentioned bearing surfaces are moving relative to each other, is moving at a speed which makes the frictional losses in the two gaps equal.
Inventors
- 👤 E Johansson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:20
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0685; F16C32/0688
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
121 words
The combination comprising a shaft member having a frustoconical first bearing surface and a bearing part having a frustoconical second bearing surface, the bearing surfaces being movable relative to one another, a sleeve member of generally frusto-conical shape interposed between said bearing surfaces, said sleeve member having at least one inner hydrostatic pocket confronting said first bearing surface and said bearing part having at least one outer hydrostatic pocket confronting the outer surface of said sleeve, channel means including metering means connecting said pockets to a source of fluid under pressure whereby upon relative rotation of said first and second bearing surfaces, said sleeve member is rotated at a speed which makes the friction losses in the hydrostatic pockets approximately equal.
Claim 2
Dependent Claim
121 words
The combination comprising a shaft member having a frustoconical first bearing surface and a bearing part having a frustoconical second bearing surface, the bearing surfaces being movable relative to one another, a sleeve member of generally frusto-conical shape interposed between said bearing surfaces, said sleeve member having at least one inner hydrostatic pocket confronting said first bearing surface and said bearing part having at least one outer hydrostatic pocket confronting the outer surface of said sleeve, channel means including metering means connecting said pockets to a source of fluid under pressure whereby upon relative rotation of said first and second bearing surfaces, said sleeve member is rotated at a speed which makes the friction losses in the hydrostatic pockets approximately equal.
Claim 3
Dependent Claim
33 words
The combination as claimed in claim 1 including a plurality of circumferentially spaced outer hydrostatic pockets in said bearing surface of said bearing part separated by a plurality of circumferentially spaced axial ribs.
Claim 4
Dependent Claim
34 words
The combination as claimed in claim 2 including a plurality of inner hydrostatic pockets formed in said sleeve member confronting said first bearing surface and separated by a plurality of circumferentially spaced axial ribs.
References Cited (Backward Citations)
US3223463A
Cited
DE1928784A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |