Patent US3533917A successfully refreshed from Google Patents.
US4767221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compliant hydrodynamic gas lubricated thrust bearing
Assignee: Williams International Corp
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Filing: 1987-06-11
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Granted: 1988-08-30
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Expires: 2007-06-11
Abstract
Abstract A self-pressurizing compliant gas thrust bearing includes a resilient support system having a multi-stage spring arrangement for supporting a flexible foil. The compliant and resilient support system enables the bearing to accomodate extreme transient loads, local thermal distortions, shaft misalignment and runout.
Inventors
- 👤 Guisuppe Paletta, deceased
- 👤 legal representative Angelo D. Paletta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:04
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/04; F16C17/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A self-pressurizing compliant hydrodynamic gas thrust bearing assembly comprising: a shaft having a radially extending thrust plate thereon, a shaft journal supporting said shaft having a radially extending face thereon, juxtaposed to the thrust plate on said shaft, a plurality of U-shaped spring elements each of which has a bight portion and reentrantly secured to folded leg portions, the bight portion of each of said spring elements being secured to and extending radially of the end face of said shaft journal, a plurality of pads secured to the leg portion of said spring elements, respectively, and a flexible foil interposed between the pads on the end face of said journal and the thrust plate on said shaft, one end of said foil being secured to the end face of said shaft journal to preclude indexing of said foil.
Claim 2
Dependent Claim
138 words
A self-pressurizing compliant hydrodynamic gas thrust bearing assembly comprising: a shaft having a radially extending thrust plate thereon, a shaft journal supporting said shaft having a radially extending face thereon, juxtaposed to the thrust plate on said shaft, a plurality of U-shaped spring elements each of which has a bight portion and reentrantly secured to folded leg portions, the bight portion of each of said spring elements being secured to and extending radially of the end face of said shaft journal, a plurality of pads secured to the leg portion of said spring elements, respectively, and a flexible foil interposed between the pads on the end face of said journal and the thrust plate on said shaft, one end of said foil being secured to the end face of said shaft journal to preclude indexing of said foil.
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) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |