Patent US3347520A successfully refreshed from Google Patents.
US3347520A
Expired / Lapsed
US
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Turbomachine blading
Assignee: Individual
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Filing: 1966-07-12
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Granted: 1967-10-17
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Expires: 1986-07-12
Abstract
No abstract record available.
Inventors
- 👤 Jerzy A Oweczarek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:08
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/26; F01D5/14; F01D5/141; F01D5/16; F04; F04D; F04D29/00; F04D29/66; F04D29/661; F04D29/666; F05; F05D; F05D2260/00; F05D2260/96; F05D2260/961; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
IN COMBINATION IN A TURBOMACHINE, A CASING, A PLURALITY OF ROWS OF PERIPHERALLY SPACED STATOR BLADES, WITH STATOR FLOW PASSAGES THEREBETWEEN, MOUNTED THEREIN AND EXTENDING INWARDLY THEREFROM, A ROTOR POSITIONED IN SAID CASING FOR ROTATION ABOUT AN AXIS AND HAVING MOUNTED THEREON A PLURALITY OF ROWS OF PERIPHERALLY SPACED ROTOR BLADES, WITH ROTOR FLOW PASSAGES THEREBETWEEN, AT LEAST ONE OF SAID ROWS OF BLADES COMPRISING FIRST BLADES, COMPRISING MORE THAN 50% OF THE BLADES IN SAID ROW, AND SECOND BLADES, COMPRISING AT LEAST 5% OF THE BLADES IN SAID ROW, HAVING AT LEAST A PORTION OF THE LEADING EDGES THEREOF RECESSED RELATIVE TO THE LEADING EDGES OF SAID FIRST BLADES WHEREBY PRESSURE WAVES REFLECTING IN THE VICINITY OF THE LEADING EDGES OF A ROW OF SAID FIRST BLADES AND SAID SECOND BLADES ARE DISRUPTED BY THE NON-UNIFORMITY OF THE LEADING EDGES THEREOF.
Claim 2
Dependent Claim
142 words
IN COMBINATION IN A TURBOMACHINE, A CASING, A PLURALITY OF ROWS OF PERIPHERALLY SPACED STATOR BLADES, WITH STATOR FLOW PASSAGES THEREBETWEEN, MOUNTED THEREIN AND EXTENDING INWARDLY THEREFROM, A ROTOR POSITIONED IN SAID CASING FOR ROTATION ABOUT AN AXIS AND HAVING MOUNTED THEREON A PLURALITY OF ROWS OF PERIPHERALLY SPACED ROTOR BLADES, WITH ROTOR FLOW PASSAGES THEREBETWEEN, AT LEAST ONE OF SAID ROWS OF BLADES COMPRISING FIRST BLADES, COMPRISING MORE THAN 50% OF THE BLADES IN SAID ROW, AND SECOND BLADES, COMPRISING AT LEAST 5% OF THE BLADES IN SAID ROW, HAVING AT LEAST A PORTION OF THE LEADING EDGES THEREOF RECESSED RELATIVE TO THE LEADING EDGES OF SAID FIRST BLADES WHEREBY PRESSURE WAVES REFLECTING IN THE VICINITY OF THE LEADING EDGES OF A ROW OF SAID FIRST BLADES AND SAID SECOND BLADES ARE DISRUPTED BY THE NON-UNIFORMITY OF THE LEADING EDGES THEREOF.
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) | 1970-10-16 | 1971-04-17 | 1971-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-16 | 1975-04-17 | 1975-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-16 | 1979-04-17 | 1979-10-17 | $7700.00 | Window Closed / Lapsed |