US3902771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rubber stave bearing which will permit slow speed motion without stick-slip and resultant squeal
Assignee: United States Department of the Navy
•
Filing: 1974-03-26
•
Granted: 1975-09-02
•
Expires: 1994-03-26
Abstract
Abstract A bearing assembly for preventing ''''stick-slip'''' phenomenon due to shaft rotation. A rotatable metal shell is placed between the shaft and an outer set of stave bearings which are attached to an outer stationary housing. An inner set of rubber staves connected to the rotatable metal shell separates the rotatable shell from the shaft. The metal shell is rotated in the opposite direction of shaft rotation or in the same direction but at a faster rotational speed by mechanical means or by electromagnetic means to obtain the hydrodynamic film necessary for silent operation.
Inventors
- 👤 Thomas L Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:08
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/26; B; B63; B63H; B63H23/00; B63H23/32; B63H23/321; B63H23/326; F16C17/00; F16C17/12; F16C17/14; F16C17/18; F16C33/22; F16C2326/00; F16C2326/30
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
A shaft and bearing assembly comprising: a rotatable shaft; a rotatable shell surrounding said shaft; a first bearing assembly attached to the interior of said shell and positioned in the space intermediate said shell and said shaft; a stationary bearing housing surrounding said shell; said housing having a second bearing assembly attached to the interior thereof, and intermediate said shell and said housing; means for rotating said shell and said bearing assembly attached thereto in a direction opposite the direction of rotation of said shaft; and means for hydrodynamic lubrication of said first and second bearing assemblies comprising a liquid in which said bearing is immersed under normal operating conditions.
Claim 2
Dependent Claim
110 words
A shaft and bearing assembly comprising: a rotatable shaft; a rotatable shell surrounding said shaft; a first bearing assembly attached to the interior of said shell and positioned in the space intermediate said shell and said shaft; a stationary bearing housing surrounding said shell; said housing having a second bearing assembly attached to the interior thereof, and intermediate said shell and said housing; means for rotating said shell and said bearing assembly attached thereto in a direction opposite the direction of rotation of said shaft; and means for hydrodynamic lubrication of said first and second bearing assemblies comprising a liquid in which said bearing is immersed under normal operating conditions.
Claim 3
Dependent Claim
11 words
The assembly of claim 1 wherein said bearings include rubber staves.
Claim 4
Dependent Claim
35 words
The assembly of claim 1 wherein said means for rotating said shell includes gear means operably inter-connected to said shaft and to said shell, said gear means being driven by the rotation of said shaft.
Claim 5
Dependent Claim
21 words
The assembly of claim 1 wherein said means for rotating said shell includes a drive motor operably connected to said shell.
Claim 6
Dependent Claim
115 words
A shaft and bearing assembly comprising: a rotatable shaft; a rotatable shell surrounding said shaft and comprising a rotor of a dynamo-electric machine; a first bearing assembly attached to the interior of said shell; a stationary bearing housing surrounding said shell; said housing having a second bearing assembly comprising the stator of a dynamo-electric machine; energizing means operably coupled to said housing for forcing rotation of said shell and the bearing assembly, whereby the forced rotation of said shell increases the relative rotational speeds between said shaft and bearing assembly; and means for hydrodynamic lubrication of said first and second bearing assemblies comprising a liquid in which said bearing is immersed under normal operating conditions.
Claim 7
Dependent Claim
115 words
A shaft and bearing assembly comprising: a rotatable shaft; a rotatable shell surrounding said shaft and comprising a rotor of a dynamo-electric machine; a first bearing assembly attached to the interior of said shell; a stationary bearing housing surrounding said shell; said housing having a second bearing assembly comprising the stator of a dynamo-electric machine; energizing means operably coupled to said housing for forcing rotation of said shell and the bearing assembly, whereby the forced rotation of said shell increases the relative rotational speeds between said shaft and bearing assembly; and means for hydrodynamic lubrication of said first and second bearing assemblies comprising a liquid in which said bearing is immersed under normal operating conditions.
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |