Patent US3394918A successfully refreshed from Google Patents.
US3394918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bimetallic airfoils
Assignee: Howmet Turbine Components Corp
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Filing: 1966-04-13
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Granted: 1968-07-30
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Expires: 1986-04-13
Abstract
No abstract record available.
Inventors
- 👤 Robert L Wiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:44
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/01; B32B15/013; C; C22; C22C; C22C19/00; F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F16; F16H; F16H41/00; F16H41/24; F16H41/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
144 words
A BIMETALLIC AIRFOIL WHICH IS SUBJECT TO THE IMPINGEMENT OF HOT GAS ON ITS SURFACE AREAS DEFINING A HOT ZONE WHERE THE TEMPERATURES OF THE IMPINGING GASES ARE ABOVE ABOUT 1100*F. AND A COOL ZONE WHERE THE TEMPERATURE OF THE MPINGINING GASES ARE BELOW THIS TEMPERATURE COMPRISING AN INTEGRAL UNITARY AIRFOIL STRUCTURE OF TWO METAL ALLOY COMPOSITIONS, A FIRST INTEGRAL PORTION COMPOSED OF A FIRST METAL ALLOY COMPOSITION, AND A SECOND INTEGRAL PORTION COMPOSED OF A SECOND METAL ALLOY COMPOSITION, SAID SECOND METAL COMPOSITION DEFINING THE SURFACE AREA ALONG THE HOT ZONE OF THE AIRFOIL AND IS FUSED TO SAID FIRST METAL COMPOSITION BY A METALLURGICAL BOND ALONG A FUSE ZONE LOCATED IN THE COOL ZONE, SAID FIRST METAL COMPOSITION HAVING DUCTILE AND IMPACT RESISTANT PROPERTIES IN EXCESS OF SAID SECOND METAL COMPOISIONG AND SAID SECOND METAL COMPOSITION HAVING THERMAL FATIGUE PROPERTIES ABOVE 1100*F.
Claim 2
Dependent Claim
144 words
A BIMETALLIC AIRFOIL WHICH IS SUBJECT TO THE IMPINGEMENT OF HOT GAS ON ITS SURFACE AREAS DEFINING A HOT ZONE WHERE THE TEMPERATURES OF THE IMPINGING GASES ARE ABOVE ABOUT 1100*F. AND A COOL ZONE WHERE THE TEMPERATURE OF THE MPINGINING GASES ARE BELOW THIS TEMPERATURE COMPRISING AN INTEGRAL UNITARY AIRFOIL STRUCTURE OF TWO METAL ALLOY COMPOSITIONS, A FIRST INTEGRAL PORTION COMPOSED OF A FIRST METAL ALLOY COMPOSITION, AND A SECOND INTEGRAL PORTION COMPOSED OF A SECOND METAL ALLOY COMPOSITION, SAID SECOND METAL COMPOSITION DEFINING THE SURFACE AREA ALONG THE HOT ZONE OF THE AIRFOIL AND IS FUSED TO SAID FIRST METAL COMPOSITION BY A METALLURGICAL BOND ALONG A FUSE ZONE LOCATED IN THE COOL ZONE, SAID FIRST METAL COMPOSITION HAVING DUCTILE AND IMPACT RESISTANT PROPERTIES IN EXCESS OF SAID SECOND METAL COMPOISIONG AND SAID SECOND METAL COMPOSITION HAVING THERMAL FATIGUE PROPERTIES ABOVE 1100*F.
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) | 1971-07-30 | 1972-01-29 | 1972-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-30 | 1976-01-29 | 1976-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-30 | 1980-01-29 | 1980-07-30 | $7700.00 | Window Closed / Lapsed |