US4346947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic pressure gas-liquid double phase bearing
Assignee: AOKI HIROSHI A CORPOF JAPAN
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Filing: 1980-08-13
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Granted: 1982-08-31
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Expires: 2000-08-13
Abstract
Abstract A hydrostatic pressure bearing has a gas supply port and liquid supply ports on its bearing surface. A thin bearing clearance is defined by a hydrostatic pressure supporting force between the bearing and a rotor supported by the bearing by supplying a pressurized gas to the bearing surface through the gas supply port. A liquid is fed from the liquid supply ports into the bearing clearance to form a thin liquid film in the bearing clearance, and said liquid film reduces the rate of drop of the static pressure of the gas on the bearing surface.
Inventors
- 👤 Tsunamitsu Nakahara
- 👤 Hiroshi Aoki
- 👤 Toru Kurisu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:14
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
145 words
A hydrostatic pressure bearing for a rotor having a bearing surface, comprising: a stationary body having a bearing surface and spaced from the bearing surface of said rotor by a predetermined clearance; a central gas passageway formed in a central part of said stationary body and communicating with a source of gas under pressure, said gas passageway opening to said clearance to form a gas film therebetween; and liquid passageway means circumferentially formed in said stationary body around said central gas passageway and communicating with a source liquid, said liquid passageway means opening to said clearance to provide a thin liquid film which is adhered to the bearing surface of said stationary body in a circle shape during rotation of said rotor; whereby said gas under pressure flows between said thin liquid film and the bearing surface of said rotor to rotatably support said rotor.
Claim 2
Dependent Claim
145 words
A hydrostatic pressure bearing for a rotor having a bearing surface, comprising: a stationary body having a bearing surface and spaced from the bearing surface of said rotor by a predetermined clearance; a central gas passageway formed in a central part of said stationary body and communicating with a source of gas under pressure, said gas passageway opening to said clearance to form a gas film therebetween; and liquid passageway means circumferentially formed in said stationary body around said central gas passageway and communicating with a source liquid, said liquid passageway means opening to said clearance to provide a thin liquid film which is adhered to the bearing surface of said stationary body in a circle shape during rotation of said rotor; whereby said gas under pressure flows between said thin liquid film and the bearing surface of said rotor to rotatably support said rotor.
Claim 3
Dependent Claim
26 words
A hydrostatic pressure bearing according to claim 1, in which said gas passageway and said liquid passageway means open to said clearance at a co-planar surface.
Claim 4
Dependent Claim
31 words
A hydrostatic pressure bearing according to claim 1 or 2, in which each of said liquid passageway means has a port formed with a rounded edge to form said gas film.
Claim 5
Dependent Claim
33 words
A hydrostatic pressure bearing according to claim 1, in which said stationary body has an annular groove formed on the bearing surface of said stationary body and communicating with said liquid passageway means.
Claim 6
Dependent Claim
25 words
A hydrostatic pressure bearing according to claim 1, in which said gas passageway has a diameter larger in value than the thickness of said clearance.
Claim 7
Dependent Claim
15 words
A hydrostatic pressure bearing according to claim 1, in which said liquid is an oil.
Claim 8
Dependent Claim
19 words
A hydrostatic pressure bearing according to claim 1, in which said liquid is an oil containing a gaseous component.
Claim 9
Dependent Claim
151 words
A hydrostatic pressure bearing for a shaft having an outer bearing surface, comprising: a cylindrical body having an inner bearing surface and spaced from the bearing surface of said shaft by a predetermined clearance; central gas passageway means formed in a central part of said cylindrical body and communicating with a source of gas under pressure, said gas passageway opening to said clearance to form a gas film therebetween; and first and second liquid passageway means formed in said cylindrical body on both sides of said central gas passageway means and communicating with a source liquid, said liquid passageway means opening to said clearance to provide first and second thin liquid films which are adhered to the bearing surface of said cylindrical body during rotation of said shaft; whereby said gas under pressure flows between said thin liquid films and the bearing surface of said rotor to rotatably support said shaft.
Claim 10
Dependent Claim
151 words
A hydrostatic pressure bearing for a shaft having an outer bearing surface, comprising: a cylindrical body having an inner bearing surface and spaced from the bearing surface of said shaft by a predetermined clearance; central gas passageway means formed in a central part of said cylindrical body and communicating with a source of gas under pressure, said gas passageway opening to said clearance to form a gas film therebetween; and first and second liquid passageway means formed in said cylindrical body on both sides of said central gas passageway means and communicating with a source liquid, said liquid passageway means opening to said clearance to provide first and second thin liquid films which are adhered to the bearing surface of said cylindrical body during rotation of said shaft; whereby said gas under pressure flows between said thin liquid films and the bearing surface of said rotor to rotatably support said shaft.
Claim 11
Dependent Claim
34 words
A hydrostatic pressure bearing according to claim 8, in which said cylindrical body has formed on its inner bearing surface first and second annular grooves communicating with said first and second liquid passageway means.
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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) | 1985-08-30 | 1986-03-01 | 1986-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-08-30 | 1990-03-01 | 1990-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-08-30 | 1994-03-01 | 1994-08-31 | $7700.00 | Window Closed / Lapsed |