US3301530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Damped blade
Assignee: Motors Liquidation Co
•
Filing: 1965-08-03
•
Granted: 1967-01-31
•
Expires: 1985-08-03
Abstract
No abstract record available.
Inventors
- 👤 William R Lull
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:45
CPC Classifications
C; C23; C23C; C23C28/00; C23C28/02; C23C28/023; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
IN A DAMPING MEANS FOR A ROTOR BLADE OR THE LIKE OF A METAL HAVING A MODULUS OF ELASTICITY WHICH IS HIGHER THAN THE MODULUS OF ELASTICITY OF COPPER AND LOWER THAN THE MODULUS OF ELASTICITY OF CHROMIUM, THE COMBINATION COMPRISING: A FIRST LAYER OF COPPER COATED ON SAID BLADE, AND A HARD LAYER OF CHRO,IUM COATED ON SAID FIRST METALLIC LAYER WHEREBY VIBRATION OF THE BLADE PRODUCES SHEAR STRESSES AT THE INTERFACES BETWEEN THE BLADE AND THE COPPER LAYER AND BETWEEN THE COPPER AND CHROMIUM LAYERS TO DISSIPATE THE ENERGY OF VIBRATION TO DAMP SAID VIBRATION.
References Cited (Backward Citations)
US2719095A
Cited
US3240572A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |