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US3309294A
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Electrolytic shaping of metallic aerofoil blades
Assignee: Rolls Royce PLC
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Filing: 1963-04-29
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Granted: 1967-03-14
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Expires: 1983-04-29
Abstract
No abstract record available.
Inventors
- 👤 Goodwin Frederick Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:35
CPC Classifications
B; B23; B23H; B23H11/00; B23H11/003; B23H9/00; B23H9/10; C; C25; C25F; C25F3/00; C25F3/02; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/147; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49316; Y10T29/49336
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF MANUFACTURING A METALLIC AEROFOIL BLADE HAVING A LONGITUDINAL EDGE, COMPRISING THE STEPS OF: REMOVING METAL FROM SAID EDGE BY A MACHINING PROCESS SO THAT IT HAS AN ELONGATE FLAT SURFACE SUBSTANTIALLY PERPENDICULAR TO THE MEAN CAMBER LINE OF SAID BLADE; CLAMPING THE MACHINED BLADE BLANK WITH SAID ELONGATE FLAT SURFACE EXTENDING PARALLEL TO AN ELONGATE ELECTRODE AND SPACED THEREFROM BY A NARROW GAP, PLACING SAID BLANK AND SAID ELECTRODE AT SUBSTANTIALLY DIFFERENT ELECTRICAL POTENTIALS; DIRECTING ELECTROLYTE THROUGH SAID GAP; AND REMOVING METAL ELECTROLYTICALLY FROM SAID ELONGATE FLAT SURFACE SO AS TO RADIUS IT BY PASSING CURRENT BETWEEN SAID BLADE BLANK AND THE ELECTRODE.
Claim 2
Independent Claim
106 words
A METHOD OF MANUFACTURING A METALLIC AEROFOIL BLADE HAVING A LONGITUDINAL EDGE, COMPRISING THE STEPS OF: REMOVING METAL FROM SAID EDGE BY A MACHINING PROCESS SO THAT IT HAS AN ELONGATE FLAT SURFACE SUBSTANTIALLY PERPENDICULAR TO THE MEAN CAMBER LINE OF SAID BLADE; CLAMPING THE MACHINED BLADE BLANK WITH SAID ELONGATE FLAT SURFACE EXTENDING PARALLEL TO AN ELONGATE ELECTRODE AND SPACED THEREFROM BY A NARROW GAP, PLACING SAID BLANK AND SAID ELECTRODE AT SUBSTANTIALLY DIFFERENT ELECTRICAL POTENTIALS; DIRECTING ELECTROLYTE THROUGH SAID GAP; AND REMOVING METAL ELECTROLYTICALLY FROM SAID ELONGATE FLAT SURFACE SO AS TO RADIUS IT BY PASSING CURRENT BETWEEN SAID BLADE BLANK AND THE ELECTRODE.
References Cited (Backward Citations)
GB703838A
Cited
US2844531A
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US2995502A
Cited
US2974097A
Cited
US3058895A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |