US3720481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for forming and securing turbine compressor blades
Assignee: Avco Corp
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Filing: 1971-04-28
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Granted: 1973-03-13
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Expires: 1991-04-28
Abstract
Abstract THE INVENTION IS A FORMING DIE FOR USE IN FABRICATING COMPRESSOR BLADES FROM SYNTHETIC FIBERS. SUCH FIBERS ARE SPACED A DETERMINED DISTANCE APART AND FORMED INTO A WEB WHICH IS HELD IN FIXED POSITION APPROXIMATING THE SHAPE OF THE FINISHED BLADE AND THEN IMPREGNATED WITH A BONDING AGENT TO PRODUCE AN INTEGRAL BLADE WITH REINFORCED BLADE PORTIONS AND ROOT PORTIONS. THE INVENTION INCLUDES MEANS FOR MOUNTING BLADES TO A ROTOR BY SECURING A SPLIT BUSHING WITH OPPOSITELY DISPOSED CONICAL BORES IN THE BORE OF THE BLADE ROOT, INSERTING AND SECURING THE BLADE ROOT IN A KEYHOLE SLOT IN THE ROTOR AND BY FORCING THE CONICAL WEDGES TOGETHER IN SAID BUSHING. D R A W I N G
Inventors
- 👤 S Motta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/14; F01D5/147; F01D5/30; F01D5/3007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |