US3104093A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blade damping device
Assignee: RTX Corp
•
Filing: 1961-04-11
•
Granted: 1963-09-17
•
Expires: 1981-04-11
Abstract
No abstract record available.
Inventors
- 👤 Harold M Craig
- 👤 William T Keiran
- 👤 Charles B Wilson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:05
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/22; F01D11/00; F01D11/005; F01D11/006; F01D11/008; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A ROTOR CONSTRUCTION, A HUB HAVING SLOTS IN THE PERIPHERY THEREOF, A PLURALITY OF BLADES ARRANGED AROUND THE PERIPHERY OF THE HUB AND HAVING ROOTS ENGAGING SAID SLOTS, EACH BLADE HAVING AN AIRFOIL SECTION AND A ROOT EXTENSION PROJECTING RADIALLY OUTWARDS FROM THE ROOT TO THE AIRFOIL SECTION, EACH BLADE HAVING A PLATFORM AT THE JUNCTION OF THE ROOT EXTENSION AND THE AIRFOIL SECTION, THE ROOT EXTENSIONS OF ADJACENT BLADES HAVING PROJECTING FLANGES THEREON LOCATED RADIALLY INWARD OF THE PLATFORMS AND POSITIONED SUBSTANTIALLY AT THE SAME ANGLE WITH RESPECT TO THE AXIS OF THE HUB, THE FLANGES ON ADJACENT BLADES OVERLAPPING AND IN FRICTIONAL ENGAGEMENT, THE CONTACTING SURFACES OF THE FLANGES ON ADJACENT BLADES LYING SUBSTANTIALLY IN A TRANSVERSE RADIAL PLANE.
Claim 2
Dependent Claim
122 words
IN A ROTOR CONSTRUCTION, A HUB HAVING SLOTS IN THE PERIPHERY THEREOF, A PLURALITY OF BLADES ARRANGED AROUND THE PERIPHERY OF THE HUB AND HAVING ROOTS ENGAGING SAID SLOTS, EACH BLADE HAVING AN AIRFOIL SECTION AND A ROOT EXTENSION PROJECTING RADIALLY OUTWARDS FROM THE ROOT TO THE AIRFOIL SECTION, EACH BLADE HAVING A PLATFORM AT THE JUNCTION OF THE ROOT EXTENSION AND THE AIRFOIL SECTION, THE ROOT EXTENSIONS OF ADJACENT BLADES HAVING PROJECTING FLANGES THEREON LOCATED RADIALLY INWARD OF THE PLATFORMS AND POSITIONED SUBSTANTIALLY AT THE SAME ANGLE WITH RESPECT TO THE AXIS OF THE HUB, THE FLANGES ON ADJACENT BLADES OVERLAPPING AND IN FRICTIONAL ENGAGEMENT, THE CONTACTING SURFACES OF THE FLANGES ON ADJACENT BLADES LYING SUBSTANTIALLY IN A TRANSVERSE RADIAL PLANE.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-16 | 1967-03-18 | 1967-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-16 | 1971-03-18 | 1971-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-16 | 1975-03-18 | 1975-09-17 | $7700.00 | Window Closed / Lapsed |