Patent US3639014A successfully refreshed from Google Patents.
US3639014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damped bearing
Assignee: NAT RES DEV
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Filing: 1969-03-24
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Granted: 1972-02-01
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Expires: 1989-03-24
Abstract
Abstract A bearing assembly, in which the bearing is located between the fixed and rotatable members in such a manner that it can adjust to a certain extent to radial movement of the movable member, is damped against vibration or shock by housing a seismic mass in the bearing with limited freedom of radial movement.
Inventors
- 👤 Herbert Sixsmith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:00
CPC Classifications
F; F16; F16C; F16C27/00; F16C27/02; F16C17/00; F16C17/02; F16C17/03; F16C17/035; F16C33/00; F16C33/02; F16C33/04; F16C33/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
121 words
A damped bearing assembly for a rotatable member, comprising: a rotatable member having a bearing surface therearound, a support for said rotatable member, at least one bearing means arranged around said rotatable member for limited movement radially of the axis of rotation of the rotatable member, said bearing means being positioned between said rotatable member and said support, a generally cylindrical cavity formed in said bearing means on an axis which is substantially parallel with the axis of rotation of the rotatable member, and a generally cylindrical seismic mass located in said cavity with a small radial clearance between the seismic mass and the cavity so that said seismic mass is free to move for limited radial distances within said cavity.
Claim 2
Dependent Claim
121 words
A damped bearing assembly for a rotatable member, comprising: a rotatable member having a bearing surface therearound, a support for said rotatable member, at least one bearing means arranged around said rotatable member for limited movement radially of the axis of rotation of the rotatable member, said bearing means being positioned between said rotatable member and said support, a generally cylindrical cavity formed in said bearing means on an axis which is substantially parallel with the axis of rotation of the rotatable member, and a generally cylindrical seismic mass located in said cavity with a small radial clearance between the seismic mass and the cavity so that said seismic mass is free to move for limited radial distances within said cavity.
Claim 3
Dependent Claim
27 words
An assembly according to claim 1 wherein the bearing means is spaced from said rotatable member by a gas film and is resiliently supported from said support.
Claim 4
Dependent Claim
45 words
An assembly accordinG to claim 1 wherein the bearing means houses a plurality of component seismic masses in the form of cylindrical rollers located in a plurality of said cylindrical cavities, each of which are parallel to the axis of rotation of said rotatable member.
Claim 5
Dependent Claim
16 words
An assembly according to claim 3 wherein said rollers are uniformly spaced in the bearing means.
Claim 6
Dependent Claim
25 words
An assembly according to claim 3 wherein the clearance between each roller and its associated cavity is of the order of 0.0001 to 0.0025 inch.
Claim 7
Dependent Claim
15 words
An assembly according to claim 1 wherein said mass is resiliently mounted from the support.
Claim 8
Dependent Claim
80 words
An assembly according to claim 1 wherein the bearing means comprises a plurality of bearing pads arranged in uniform succession around said rotatable member, each pad being spaced from said rotatable member with decreasing radial clearance from the leading edge to the trailing edge of the pad relative to the direction of rotation, and pad support means disposed remotely from said rotatable member and resiliently supported from said support for the rotatable member, said last-named support being a fixed member.
Claim 9
Dependent Claim
51 words
An assembly according to claim 7 wherein said pad support means is of generally unitary, cylindrical form, housing a plurality of component seismic masses each in the form of cylindrical rollers located in separate cylindrical bores parallel to the axis of rotation and spaced from the bores by small radial clearances.
Claim 10
Dependent Claim
41 words
An assembly according to claim 7 wherein said pad support means is of generally longitudinally split cylindrical form with one sectoral part per pad, each sectoral part being individually resiliently supported from said fixed member and housing like component seismic masses.
Claim 11
Dependent Claim
19 words
An assembly according to claim 9 wherein each of said sectoral parts is tiltably supported from said fixed member.
References Cited (Backward Citations)
US3351394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |