US3383091A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial turbine blade damping device
Assignee: Pratt and Whitney Canada Corp
•
Filing: 1966-07-21
•
Granted: 1968-05-14
•
Expires: 1986-07-21
Abstract
No abstract record available.
Inventors
- 👤 Newland Allan Burrell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:03
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/04; F01D5/043; F01D5/045; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
IN A CENTRIPETAL HIGH VELOCITY GAS TURBINE WHEEL HAVING AN AXIS OF ROTATION, AXIALLY SEPARATE LEADING AN EXDUCER WHEEL SECTIONS, EACH SAID SECTION HAVING A HUB AND BLADES EXTENDING RADIALLY FROM THE HUB, AND THE HUBS BEING INTERCONNECTED FOR SIMULTANEOUS ROTATION, AND THE LEADING AND EXDUCER BLADES HAVING RESPECTIVE ADJACENT EDGES ALIGNED, THE IMPROVEMENT IN WHICH THE ADJACENT EDGES OF EACH ONE OF LEADING BLADE AND ALIGNED EXDUCER BLADE COMPRISE: RECESSED PORTIONS EXTENDING OVER PART OF THEIR RADIAL LENGTH, THE RECESSES PROVIDING AXIAL SEPARATION OF SAID PORTIONS OF THE EDGES, AND REMAINING PORTIONS WHICH ARE OUTWARDLY PROJECTED FROM THE SAID RECESSED PORTIONS AND WHICH ABUT IN A PLANE WHICH IN ONE DIMENSION IS RADIAL AND IN THE OTHER DIMENSION IS OBLIQUE TO THE PLANE OF THE BLADES IN SAID REGION, SAID OBLIQUE PLANE BEING DIRECTED OPPOSITELY WITH RESPECT TO SAID PLANE OF THE BLADES IN EACH PAIR OF CIRCUMFERENTIALLY ADJACENT BLADES.
Claim 2
Dependent Claim
151 words
IN A CENTRIPETAL HIGH VELOCITY GAS TURBINE WHEEL HAVING AN AXIS OF ROTATION, AXIALLY SEPARATE LEADING AN EXDUCER WHEEL SECTIONS, EACH SAID SECTION HAVING A HUB AND BLADES EXTENDING RADIALLY FROM THE HUB, AND THE HUBS BEING INTERCONNECTED FOR SIMULTANEOUS ROTATION, AND THE LEADING AND EXDUCER BLADES HAVING RESPECTIVE ADJACENT EDGES ALIGNED, THE IMPROVEMENT IN WHICH THE ADJACENT EDGES OF EACH ONE OF LEADING BLADE AND ALIGNED EXDUCER BLADE COMPRISE: RECESSED PORTIONS EXTENDING OVER PART OF THEIR RADIAL LENGTH, THE RECESSES PROVIDING AXIAL SEPARATION OF SAID PORTIONS OF THE EDGES, AND REMAINING PORTIONS WHICH ARE OUTWARDLY PROJECTED FROM THE SAID RECESSED PORTIONS AND WHICH ABUT IN A PLANE WHICH IN ONE DIMENSION IS RADIAL AND IN THE OTHER DIMENSION IS OBLIQUE TO THE PLANE OF THE BLADES IN SAID REGION, SAID OBLIQUE PLANE BEING DIRECTED OPPOSITELY WITH RESPECT TO SAID PLANE OF THE BLADES IN EACH PAIR OF CIRCUMFERENTIALLY ADJACENT BLADES.
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) | 1971-05-14 | 1971-11-13 | 1972-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-14 | 1975-11-13 | 1976-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-14 | 1979-11-13 | 1980-05-14 | $7700.00 | Window Closed / Lapsed |