Patent US3297301A successfully refreshed from Google Patents.
US3297301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bladed rotor for use in a fluid flow machine
Assignee: Rolls Royce PLC
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Filing: 1965-04-02
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Granted: 1967-01-10
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Expires: 1985-04-02
Abstract
No abstract record available.
Inventors
- 👤 Petrie James Alexander
- 👤 Steel Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:27
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3061; F01D5/12; F01D5/14; F01D5/18; F01D5/187; F01D5/22; F01D5/225; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
A BLADED ROTOR WHICH IS ADAPTED FOR USE IN A GAS TURBINE ENGINE, SAID ROTOR HAVING A DISC WHOSE PERIPHERY IS PROVIDED WITH A PLURALITY OF RECESSES ARRANGED CIRCUMFERENTIALLY ADJACENT TO EACH OTHER AROUND THE SAID PERIPHERY, EACH RECESS HAVING A CURVILINEAR PROFILE WITH A GRADIENT OF ITS CURVE PASSING THROUGH ONLY ONE REVERSAL OF DIRECTION, SAID ROTOR FURTHER HAVING A PLURALITY OF ANGULARLY SPACED APART BLADES, EACH BLADE HAVING A ROOT PORTION WHICH IS A CLOSE FIT IN, AND IS SECURED IN ONE OF SAID RECESSES, SAID ROTOR HAVING A CIRCUMFERENTIAL WIDTH IN EACH REGION BETWEEN ADJACENT RECESSES WHICH AT ITS RADIALLY OUTER END IS LESS THAN ONE-QUARTER OF THE CIRCUMFERENTIAL WIDTH OF EACH OF SAID RECESSES AT ITS RADIALLY OUTER END,
Claim 2
Dependent Claim
123 words
A BLADED ROTOR WHICH IS ADAPTED FOR USE IN A GAS TURBINE ENGINE, SAID ROTOR HAVING A DISC WHOSE PERIPHERY IS PROVIDED WITH A PLURALITY OF RECESSES ARRANGED CIRCUMFERENTIALLY ADJACENT TO EACH OTHER AROUND THE SAID PERIPHERY, EACH RECESS HAVING A CURVILINEAR PROFILE WITH A GRADIENT OF ITS CURVE PASSING THROUGH ONLY ONE REVERSAL OF DIRECTION, SAID ROTOR FURTHER HAVING A PLURALITY OF ANGULARLY SPACED APART BLADES, EACH BLADE HAVING A ROOT PORTION WHICH IS A CLOSE FIT IN, AND IS SECURED IN ONE OF SAID RECESSES, SAID ROTOR HAVING A CIRCUMFERENTIAL WIDTH IN EACH REGION BETWEEN ADJACENT RECESSES WHICH AT ITS RADIALLY OUTER END IS LESS THAN ONE-QUARTER OF THE CIRCUMFERENTIAL WIDTH OF EACH OF SAID RECESSES AT ITS RADIALLY OUTER END,
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) | 1970-01-09 | 1970-07-11 | 1971-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-09 | 1974-07-11 | 1975-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-09 | 1978-07-11 | 1979-01-10 | $7700.00 | Window Closed / Lapsed |