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US3333817A
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Blading structure for axial flow turbo-machines
Assignee: BBC Brown Boveri AG Germany
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Filing: 1966-05-20
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Granted: 1967-08-01
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Expires: 1986-05-20
Abstract
No abstract record available.
Inventors
- 👤 Rhomberg Friedrich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:11
CPC Classifications
B; B64; B64C; B64C11/00; B64C11/16; B64C11/18; F; F01; F01D; F01D5/00; F01D5/12; F01D5/14; F01D5/141; F04; F04D; F04D21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
ROTOR BLADING FOR THE ROTOR ELEMENT OF A THERMAL, AXIAL FLOW TURBO MACHINE OPERATING AT HIGH SPEEDS SUCH AS TO ESTABLISH A ZONE OF TRANSSONIC FLOW AT LEAST IN THE RADIALLY OUTER PORTIONS OF THE BLADES AND WHICH HAVE A PROFILE IN SAID RADIALLY OUTER PORTIONS WHEREIN THE PRESSURE SIDE OF THE BLADE IS STRAIGHT OR SLIGHTLY CONVEX, THE SUCTION SIDE IS CONCAVE AND WITH A RADIUS OF CURVATURE SMALLER THAN THAT ON THE PRESSURE SIDE OF THE BLADE, THE FORWARD PORTION OF THE BLAD TERMINATING IN THE INLET EDGE IS BARREL-SHAPED OR CLUB-SHAPED, THE MAXIMUN THICKNESS OF THE BLADE OCCURS IN THE FORWARD QUARTER OF THE CHORD LENGTH REARWARDLY OF THE INLET EDGE, THE THICKNESS OF THE BLADE AT ITS REAR BLUNT EDGE IS FORM 2 TO 4 PERCENT OF THE CHORD LENGTH, AND THE TIPS OF ADJACENT BLADES ARE SPACED APART SUCH THAT A NORMAL FROM THE REAR EDGE OF ONE BLADE TO THE PROFILE CHORD OF AN ADJACENT BLADE MEETS THE LATTER AT SUBSTANTIALLY ITS POINT OF MAXIMUM THICKNESS.
Claim 2
Dependent Claim
172 words
ROTOR BLADING FOR THE ROTOR ELEMENT OF A THERMAL, AXIAL FLOW TURBO MACHINE OPERATING AT HIGH SPEEDS SUCH AS TO ESTABLISH A ZONE OF TRANSSONIC FLOW AT LEAST IN THE RADIALLY OUTER PORTIONS OF THE BLADES AND WHICH HAVE A PROFILE IN SAID RADIALLY OUTER PORTIONS WHEREIN THE PRESSURE SIDE OF THE BLADE IS STRAIGHT OR SLIGHTLY CONVEX, THE SUCTION SIDE IS CONCAVE AND WITH A RADIUS OF CURVATURE SMALLER THAN THAT ON THE PRESSURE SIDE OF THE BLADE, THE FORWARD PORTION OF THE BLAD TERMINATING IN THE INLET EDGE IS BARREL-SHAPED OR CLUB-SHAPED, THE MAXIMUN THICKNESS OF THE BLADE OCCURS IN THE FORWARD QUARTER OF THE CHORD LENGTH REARWARDLY OF THE INLET EDGE, THE THICKNESS OF THE BLADE AT ITS REAR BLUNT EDGE IS FORM 2 TO 4 PERCENT OF THE CHORD LENGTH, AND THE TIPS OF ADJACENT BLADES ARE SPACED APART SUCH THAT A NORMAL FROM THE REAR EDGE OF ONE BLADE TO THE PROFILE CHORD OF AN ADJACENT BLADE MEETS THE LATTER AT SUBSTANTIALLY ITS POINT OF MAXIMUM THICKNESS.
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) | 1970-07-31 | 1971-01-30 | 1971-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-31 | 1975-01-30 | 1975-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-31 | 1979-01-30 | 1979-08-01 | $7700.00 | Window Closed / Lapsed |