US3938862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid bearing system
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1973-12-26
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Granted: 1976-02-17
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Expires: 1993-12-26
Abstract
Abstract A fluid bearing system for journalling a shaft against radial and/or axial loads. The described bearing consists of a housing having at least one fluid compression chamber. The housing surrounds the shaft and is provided with at least one portion which is stationarily fixed with respect to the shaft. Inlet means are provided through the stationary portion for the introduction of air or liquid. A ring securely fixed to the shaft for rotation therewith extends in opposition to the stationary portion. The ring forms with a surface of the stationary portion a throttling gap between the inlet and the compression chamber by which the restriction of fluid flow is accomplished.
Inventors
- 👤 Rainer Schurger
- 👤 Lothar Walter
- 👤 Erich Burkl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:49
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0603; F16C32/0614; F16C32/0622
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
138 words
A fluid bearing for a rotary shaft comprising a housing surrounding said shaft and forming at least one annular compression chamber on the interior surface thereof, at least one portion of said housing being annular and fixed stationary with respect to said shaft and having conduit means for the inlet of fluid under pressure to said chamber, a ring secured to said shaft for rotation therewith and extending within said compression chamber in spaced opposition to said stationary portion, having a peripheral surface coacting with said annular portion to divide said compression chamber into laterally spaced sections, said ring forming with the surface of said stationary portion a circumferential compression space and lateral throttling gaps between the inlet conduit and said lateral sections of the compression chamber for restriction of fluid flow under both radial and axial loads.
Claim 2
Dependent Claim
138 words
A fluid bearing for a rotary shaft comprising a housing surrounding said shaft and forming at least one annular compression chamber on the interior surface thereof, at least one portion of said housing being annular and fixed stationary with respect to said shaft and having conduit means for the inlet of fluid under pressure to said chamber, a ring secured to said shaft for rotation therewith and extending within said compression chamber in spaced opposition to said stationary portion, having a peripheral surface coacting with said annular portion to divide said compression chamber into laterally spaced sections, said ring forming with the surface of said stationary portion a circumferential compression space and lateral throttling gaps between the inlet conduit and said lateral sections of the compression chamber for restriction of fluid flow under both radial and axial loads.
Claim 3
Dependent Claim
17 words
The bearing according to claim 1 wherein said throttling gap extends axially with respect to said shaft.
Claim 4
Dependent Claim
40 words
The bearing according to claim 1, wherein said stationary portion has an annular surface lying normal to the axis of said shaft, said throttling gap being formed between said surface and a parallel and opposite lying end of said ring.
Claim 5
Dependent Claim
17 words
The bearing according to claim 1 wherein said throttling gap extends radially with respect to said shaft.
Claim 6
Dependent Claim
15 words
The bearing according to claim 1 wherein the ring is axially movable on said shaft.
Claim 7
Dependent Claim
30 words
The bearing according to claim 1 including at least two rows of compression chambers axially spaced from each other and ducts extending between said rows for equalizing the pressure therein.
Claim 8
Dependent Claim
41 words
The bearing according to claim 1, wherein said housing comprises a pair of end discs and said annular portion comprises at least one spacer located therebetween fixed against rotation relative to said shaft and forming the stationary portion of said bearing.
Claim 9
Dependent Claim
40 words
The bearing according to claim 7 wherein said housing is formed with two rows of compression chambers lying on the frontal faces of said end discs on opposite sides of said stationary portion in a direction normal to said shaft.
Claim 10
Dependent Claim
35 words
The bearing according to claim 7 wherein said housing is formed with two rows of compression chambers lying on the interior faces of said discs in a direction parallel to the axis of said shaft.
Claim 11
Dependent Claim
124 words
A fluid bearing according to claim 1, wherein said housing is formed by a central annulus having a large internal diameter, and a pair of lateral annular members integrally secured with said annulus having an internal diameter smaller than that of said annulus and positioned each on one side of said annulus; the open interior of said housing being defined by the inner surface of said annulus extending in axial direction parallel to the axis of the shaft and by the side walls of said lateral annular members extending adjacent said bottom radially and substantially perpendicularly to the axis of said shaft; said conduit means being open to the interior of said housing and being coupled to a source of a fluid under pressure.
Claim 12
Dependent Claim
36 words
The bearing according to claim 1, wherein said annular compression chamber is defined by an annular depression provided in and along the bottom of said annular stationary portion and by the peripheral surface of said ring.
Claim 13
Dependent Claim
36 words
The bearing according to claim 1, wherein said annular compression chamber is defined by an annular depression provided in and along the peripheral surface of said ring and by the bottom of said annular stationary portion.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-02-16 | 1979-08-18 | 1980-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-02-16 | 1983-08-18 | 1984-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-02-16 | 1987-08-18 | 1988-02-17 | $7700.00 | Window Closed / Lapsed |