Patent US3909080A successfully refreshed from Google Patents.
US3909080A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic bearing
Assignee: SKF Industrial Trading and Development Co BV
•
Filing: 1973-10-17
•
Granted: 1975-09-30
•
Expires: 1993-10-17
Abstract
Abstract A hydrostatic bearing for a roller, drum or the like having a bearing surface comprising a bearing block mounted in a support member including a body member having a central cylindrical bore, a base member for mounting the body member, and a piston movable axially in the bore. The piston is formed with a pocket at one end confronting the bearing surface and has a conduit running the axial length of the piston between the pocket and its opposite axial end which confronts the bottom of the bore. The bearing further includes adjusting means for displacing the piston, including a screw member of smaller cross-section than said piston, engageable in a threaded opening in the lower axial end face of the piston. By this arrangement, the load on the bearing block is mainly supported by the pressure medium and the adjusting means is lubricated by the pressure medium in the space, between the bottom of the bore and the lower axial end face of the piston.
Inventors
- 👤 Georg Hallnor
- 👤 Anders Christer Gustafsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:57
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0662; F16C32/0666; F16C13/00; F16C13/02; F16C13/04; F16C25/00; F16C25/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
221 words
Hydrostatic bearing for a member having a bearing surface comprising at least one bearing block cooperating with the bearing surface, each bearing block mounted in a support member including a body member having a central cylindrical bore, a base member in which the body member is mounTed and a piston movable axially in said bore formed with a pocket at one end confronting the bearing surface and having its opposite axial end confronting the bottom of the bore and spaced therefrom to define a chamber, means connecting the bottom of said bore and said chamber to a pressure medium supply and a conduit in said piston between said chamber and pocket to permit flow of pressure medium to said pocket and adjusting means for displacing said piston in said bore including a screw member engaging in a threaded opening in the lower axial end face of said piston and having at least a portion thereof disposed in said chamber and means for rotating said screw member to displace said piston axially in said bore, at least a portion of said screw member in said chamber being of a smaller cross section than said piston whereby load on said bearing block is mainly supported by the pressure medium in said chamber and said adjusting means is lubricated by the pressure medium therein.
Claim 2
Dependent Claim
221 words
Hydrostatic bearing for a member having a bearing surface comprising at least one bearing block cooperating with the bearing surface, each bearing block mounted in a support member including a body member having a central cylindrical bore, a base member in which the body member is mounTed and a piston movable axially in said bore formed with a pocket at one end confronting the bearing surface and having its opposite axial end confronting the bottom of the bore and spaced therefrom to define a chamber, means connecting the bottom of said bore and said chamber to a pressure medium supply and a conduit in said piston between said chamber and pocket to permit flow of pressure medium to said pocket and adjusting means for displacing said piston in said bore including a screw member engaging in a threaded opening in the lower axial end face of said piston and having at least a portion thereof disposed in said chamber and means for rotating said screw member to displace said piston axially in said bore, at least a portion of said screw member in said chamber being of a smaller cross section than said piston whereby load on said bearing block is mainly supported by the pressure medium in said chamber and said adjusting means is lubricated by the pressure medium therein.
Claim 3
Dependent Claim
17 words
Bearing according to claim 1, in which the screw (15) can be turned by a gear (18,19).
Claim 4
Dependent Claim
37 words
Hydrostatic bearing as claimed in claim 1 including guide means mounted in said body member cooperable with said piston to prevent rotation of said piston in said bore and permitting limited axial movement of said piston therein.
Claim 5
Dependent Claim
32 words
Hydrostatic bearing as claimed in claim 1 including flow restrictor means in said conduit operable to maintain a relatively constant pressure in said chamber independent of temporary pressure variations in said pocket.
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) | 1978-09-29 | 1979-03-31 | 1979-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-29 | 1983-03-31 | 1983-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-29 | 1987-03-31 | 1987-09-30 | $7700.00 | Window Closed / Lapsed |