US3813133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Axial thrust bearing
Assignee: SKF Industrial Trading and Development Co BV
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Filing: 1972-08-04
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Granted: 1974-05-28
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Expires: 1992-08-04
Abstract
Abstract A thrust bearing comprising a bushing having a bottom, a cylindrical axially extending wall in which a shaft is received. The bushing is provided with an opening for pressurized fluid to bear on the frontal end of the shaft to form a pressure cushion. The wall of the bushing has a diameter larger than the shaft to provide an annular clearance over the length of the wall to increase the effective pressure cushion area.
Inventors
- 👤 L Walter
- 👤 R Schurger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:15
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0681; F16C32/0692; F16C17/00; F16C17/04; F16C17/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
134 words
A hydrostatic axial thrust bearing for supporting the end of a shaft or the like comprising a cylindrical bearing bushing for receiving a shaft, said bushing being formed of thin-walled material having a bottom and an axially extending wall, an aperture formed in said bottom for receiving pressurized fluid to form a pressure cushion between said bottom and the frontal end of a shaft received in said bushing having an effective bearing surface corresponding to that of the shaft, the axial wall of said bushing having a diameter slightly greater than said shaft to provide an annular clearance thereabout uninterrupted over the axial length of said wall to provide a relatively large axial annularly restricted outflow conduit for the pressurized media about the shaft inserted therein, creating a hydrostatic pressuring in said bearing cushion.
Claim 2
Dependent Claim
134 words
A hydrostatic axial thrust bearing for supporting the end of a shaft or the like comprising a cylindrical bearing bushing for receiving a shaft, said bushing being formed of thin-walled material having a bottom and an axially extending wall, an aperture formed in said bottom for receiving pressurized fluid to form a pressure cushion between said bottom and the frontal end of a shaft received in said bushing having an effective bearing surface corresponding to that of the shaft, the axial wall of said bushing having a diameter slightly greater than said shaft to provide an annular clearance thereabout uninterrupted over the axial length of said wall to provide a relatively large axial annularly restricted outflow conduit for the pressurized media about the shaft inserted therein, creating a hydrostatic pressuring in said bearing cushion.
Claim 3
Dependent Claim
47 words
The thrust bearing according to claim 1 including an outer housing, said bushing being retained in said housing and defining therewith an annular chamber about said bushing, said annular clearance between said shaft and said bushing communicating between the frontal end of said shaft and said chamber.
Claim 4
Dependent Claim
19 words
The thrust bearing according to claim 1 including a wall disk arranged on the bottom of said cylindrical bushing.
Claim 5
Dependent Claim
21 words
The thrust bearing according to claim 3 wherein the outer diameter of the disk is greater than that of the shaft.
Claim 6
Dependent Claim
28 words
The thrust bearing according to claim 4 wherein the outer diameter of the disk is greater than the inner diameter of the bushing and is force fit therein.
Claim 7
Dependent Claim
26 words
The thrust bearing according to claim 3 wherein said disk and the bottom of the bushing are provided with coaxial openings for receiving fluid under pressure.
Claim 8
Dependent Claim
18 words
The thrust bearing according to claim 6 including valve means arranged within the opening for receiving said fluid.
Claim 9
Dependent Claim
28 words
The thrust bearing according to claim 2 including at least one radial opening in the wall of said bushing communicating directly with the annular chamber of said housing.
Claim 10
Dependent Claim
15 words
The thrust bearing according to claim 2 including an outlet port extending from said chamber.
Claim 11
Dependent Claim
18 words
The thrust bearing according to claim 2 including seal means for sealing said housing about said said shaft.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |