US4140592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas bearing surface coating
Assignee: United States Department of the Air Force
•
Filing: 1978-03-30
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Granted: 1979-02-20
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Expires: 1998-03-30
Abstract
Abstract A method for increasing the life and reliability of beryllium gas bearings by applying a coating of chromium to one bearing surface and an anodized beryllium coating to its mating surface.
Inventors
- 👤 Vincent A. Orlando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:40
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/14; F16C33/10; F16C33/1005; G; G01; G01C; G01C25/00; F16C2204/00; F16C2204/40; F16C2204/44; F16C2220/00; F16C2220/60; F16C2223/00; F16C2223/02; F16C2223/30; F16C2223/70; Y; Y10; Y10S; Y10S384/00; Y10S384/90; Y10S384/912; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49639; Y10T29/49709
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
63 words
A method for increasing the operational life and reliability of beryllium base gas bearings composed of a rotor component and a stator component which comprises: (a) forming a thin anodized beryllium coating on the surface of said stator; and (b) applying a thin, sputtered chromium coating to the surface of said rotor which is in mating contact with the surface of said stator.
Claim 2
Independent Claim
63 words
A method for increasing the operational life and reliability of beryllium base gas bearings composed of a rotor component and a stator component which comprises: (a) forming a thin anodized beryllium coating on the surface of said stator; and (b) applying a thin, sputtered chromium coating to the surface of said rotor which is in mating contact with the surface of said stator.
Claim 3
Dependent Claim
31 words
A method in accordance with claim 1 and further including the application of an intermediate coating of a nickel-containing alloy to said rotor prior to the application of said chromium coating.
Claim 4
Dependent Claim
22 words
A method in accordance with claim 1 wherein said chromium coating is applied to a depth of about 5 to 100 microinches.
Claim 5
Dependent Claim
22 words
A method in accordance with claim 1 wherein said beryllium coating is applied to a depth of about 50 to 100 microinches.
Claim 6
Dependent Claim
20 words
A method in accordance with claim 3 wherein said chromium coating is applied to a depth of about 6 microinches.
Claim 7
Dependent Claim
20 words
A method in accordance with claim 4 wherein said beryllium coating is applied to a depth of about 50 microinches.
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) | 1982-02-19 | 1982-08-21 | 1983-02-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-19 | 1986-08-21 | 1987-02-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-19 | 1990-08-21 | 1991-02-20 | $7700.00 | Window Closed / Lapsed |