US3602557A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for damping vibrations in the bearings of rotatable shafts
Assignee: Air Liquide SA
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Filing: 1969-03-26
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Granted: 1971-08-31
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Expires: 1989-03-26
Abstract
Abstract Cryogenic helium expansion turbine shaft and bearing lubricated by injecting gas under pressure, wherein the bearing comprises recesses regularly spaced around the periphery of the bearing, the recesses being provided with tubes which connect them with the other recesses through an annular groove formed in the bearing.
Inventors
- 👤 Pierre Girot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:45
CPC Classifications
F; F25; F25B; F25B31/00; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0651; F16C32/0659; F25B31/002
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
131 words
In a bearing assembly comprising a bearing and a shaft rotatable relative to the bearing, the shaft and bearing having a space therebetween for lubrication by gas under pressure, recesses in one of said bearing and shaft opening into said space, said recesses being disposed symmetrically about the axis of the shaft and being spaced equal angular distances about the axis of the shaft, one of said bearing and shaft having supply ducts therein for supplying gas under pressure to said space; the improvement comprising at least one duct in one of said bearing and shaft interconnecting at least two of said recesses, said duct being entirely spaced from said 2 ducts and entirely spaced from said space and having a least width substantially less than the width of the recesses.
Claim 2
Dependent Claim
131 words
In a bearing assembly comprising a bearing and a shaft rotatable relative to the bearing, the shaft and bearing having a space therebetween for lubrication by gas under pressure, recesses in one of said bearing and shaft opening into said space, said recesses being disposed symmetrically about the axis of the shaft and being spaced equal angular distances about the axis of the shaft, one of said bearing and shaft having supply ducts therein for supplying gas under pressure to said space; the improvement comprising at least one duct in one of said bearing and shaft interconnecting at least two of said recesses, said duct being entirely spaced from said 2 ducts and entirely spaced from said space and having a least width substantially less than the width of the recesses.
Claim 3
Dependent Claim
16 words
An assembly as claimed in claim 1, said recesses and ducts being disposed in said bearing.
Claim 4
Dependent Claim
32 words
An assembly as claimed in claim 2, said interconnecting duct comprising radially disposed portions that communicate with said recesses and a circular groove in the bearing that interconnects said radially extending portions.
Claim 5
Dependent Claim
20 words
An assembly as claimed in claim 1, the recesses interconnected by said interconnecting duct being at least three in number.
Claim 6
Dependent Claim
14 words
An assembly as claimed in claim 1, said supply ducts emptying into said recesses.
Claim 7
Dependent Claim
159 words
In a bearing assembly comprising a bearing and a shaft rotatable relative to the bearing, the shaft and bearing having a space therebetween for lubrication by gas under pressure, recesses in one of said bearing and shaft opening into said space, said recesses being disposed symmetrically about the axis of the shaft equal angular distances about the axis of the shaft, one of said bearing and shaft having supply ducts therein for supplying gas under pressure to said space; the improvement comprising at least one duct in one of said bearing and shaft interconnecting at least two of said recesses, said duct being entirely spaced from said gas-supply ducts and entirely spaced from said space and having a least width substantially less than the width of the recesses, said recesses being arranged in at least two groups with the recesses of each group interconnected by a said interconnecting duct, adjacent groups being offset from each other by equal angles.
Claim 8
Dependent Claim
159 words
In a bearing assembly comprising a bearing and a shaft rotatable relative to the bearing, the shaft and bearing having a space therebetween for lubrication by gas under pressure, recesses in one of said bearing and shaft opening into said space, said recesses being disposed symmetrically about the axis of the shaft equal angular distances about the axis of the shaft, one of said bearing and shaft having supply ducts therein for supplying gas under pressure to said space; the improvement comprising at least one duct in one of said bearing and shaft interconnecting at least two of said recesses, said duct being entirely spaced from said gas-supply ducts and entirely spaced from said space and having a least width substantially less than the width of the recesses, said recesses being arranged in at least two groups with the recesses of each group interconnected by a said interconnecting duct, adjacent groups being offset from each other by equal angles.
Claim 9
Dependent Claim
23 words
An assembly as claimed in claim 1, the areas of said recesses that open into said space being substantially equal to each other.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |