US4023252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clearance control through a nickel-graphite/aluminum copper-base alloy powder mixture
Assignee: General Electric Co
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Filing: 1975-12-12
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Granted: 1977-05-17
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Expires: 1995-12-12
Abstract
Abstract An improved abradable coating particularly useful to control clearances between relatively moving members in a sealing relationship includes a base portion and an abradable coating portion which is the fusion and interaction product of a mechanical mixture of a plurality of powdered materials comprising a nickel-graphite powder and an aluminum-copper base alloy powder.
Inventors
- 👤 Moses A. Levinstein
- 👤 Edward J. Bauersfeld
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:21
CPC Classifications
C; C22; C22C; C22C32/00; C22C32/0084; B; B22; B22F; B22F1/00; B22F1/12; B22F1/18; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/939; Y10S277/94; Y10S277/941; Y10S428/00; Y10S428/922; Y10S428/9265; Y10S428/933; Y10T; Y10T428/00; Y10T428/12; Y10T428/12458; Y10T428/12493; Y10T428/12736
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
109 words
A mechanical mixture of a plurality of powdered materials each in the size range of about -150/+ 325 mesh (U.S. Standard Sieve), the mixture comprising, by weight: greater than about 50% to less than about 80% of an aluminum-copper solid solution alloy powder consisting essentially of, by weight, 90 - 95% Cu, up to 2% of elements selected from the group consisting of Fe and Si, with the balance Al and incidental impurities; and the balance a nickel-graphite powder consisting essentially of a core of graphite and a shell of nickel, the nickel comprising, by weight, greater than about 50 and less than about 75% of the nickel-graphite powder.
Claim 2
Dependent Claim
109 words
A mechanical mixture of a plurality of powdered materials each in the size range of about -150/+ 325 mesh (U.S. Standard Sieve), the mixture comprising, by weight: greater than about 50% to less than about 80% of an aluminum-copper solid solution alloy powder consisting essentially of, by weight, 90 - 95% Cu, up to 2% of elements selected from the group consisting of Fe and Si, with the balance Al and incidental impurities; and the balance a nickel-graphite powder consisting essentially of a core of graphite and a shell of nickel, the nickel comprising, by weight, greater than about 50 and less than about 75% of the nickel-graphite powder.
Claim 3
Dependent Claim
20 words
The mixture of claim 1 in which the aluminum-copper powder is about 55 - 75 weight percent of the mixture.
Claim 4
Dependent Claim
18 words
The mixture of claim 2 in which the aluminum-copper powder is about 65 weight percent of the mixture.
Claim 5
Dependent Claim
69 words
A seal member including: a base portion; and an abradable coating portion which is the fusion and interaction product of the mixture of claim 1, secured with the base portion, the coating portion comprising a dispersion of graphite particles, a plurality of blocky particles of an aluminum-copper alloy primarily bound with platelets of nickel, the coating portion having a density of about 3.6 - 4.0 grams per cubic centimeter.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |