US3126966A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Agamian
Assignee: —
•
Filing: —
•
Granted: 1964-03-31
•
Expires: 1981-03-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:21
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/08; B64C27/10; B64C27/12; B64C27/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A HELICOPTER COMPRISING A FIRST AND SECOND COAXIAL ROTOR, A FIRST DIFFERENTIAL GEAR SYSTEM CONNECTED TO SAID FIRST ROTOR AND OPERATIVELY CONTROLLED FOR OPTIONAL DRIVING ENGAGEMENT WITH SAID FIRST ROTOR WHILE SAID FIRST DIFFERENTIAL GEAR SYSTEM IS IN OPERATION, A SECOND DIFFERENTIAL GEAR SYSTEM CONNECTED TO SAID SECOND ROTOR AND OPERATIVELY CONTROLLED FOR OPTIONAL DRIVING ENGAGEMENT WITH SAID SECOND ROTOR WHILE SAID SECOND DIFFERENTIAL GEAR SYSTEM IS IN OPERATION, AN ENGINE CONNECTED TO SAID FIRST AND SECOND DIFFERENTIAL GEAR SYSTEMS FOR TRANSMITTING DRIVING POWER THERETO, AND MEANS RESPONSIVE TO THE OPERATION OF SAID ENGINE FOR CONTROLLINGTHE OPTIONAL DRIVING ENGAGEMENT BETWEEN SAID DIFFERENTIAL GEAR SYSTEMS AND SAID ROTORS WHILE SAID DIFFERENTIAL GEAR SYSTEMS ARE IN OPERATION.
Claim 2
Dependent Claim
115 words
A HELICOPTER COMPRISING A FIRST AND SECOND COAXIAL ROTOR, A FIRST DIFFERENTIAL GEAR SYSTEM CONNECTED TO SAID FIRST ROTOR AND OPERATIVELY CONTROLLED FOR OPTIONAL DRIVING ENGAGEMENT WITH SAID FIRST ROTOR WHILE SAID FIRST DIFFERENTIAL GEAR SYSTEM IS IN OPERATION, A SECOND DIFFERENTIAL GEAR SYSTEM CONNECTED TO SAID SECOND ROTOR AND OPERATIVELY CONTROLLED FOR OPTIONAL DRIVING ENGAGEMENT WITH SAID SECOND ROTOR WHILE SAID SECOND DIFFERENTIAL GEAR SYSTEM IS IN OPERATION, AN ENGINE CONNECTED TO SAID FIRST AND SECOND DIFFERENTIAL GEAR SYSTEMS FOR TRANSMITTING DRIVING POWER THERETO, AND MEANS RESPONSIVE TO THE OPERATION OF SAID ENGINE FOR CONTROLLINGTHE OPTIONAL DRIVING ENGAGEMENT BETWEEN SAID DIFFERENTIAL GEAR SYSTEMS AND SAID ROTORS WHILE SAID DIFFERENTIAL GEAR SYSTEMS ARE IN OPERATION.
References Cited (Backward Citations)
FR750718A
Cited
US2421518A
Cited
US2473331A
Cited
US2671517A
Cited
US2625228A
Cited
US2667227A
Cited
US2687779A
Cited
US2669308A
Cited
US2985243A
Cited
DE1019568B
Cited
US2992684A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-31 | 1967-09-30 | 1968-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-31 | 1971-09-30 | 1972-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-31 | 1975-09-30 | 1976-03-31 | $7700.00 | Window Closed / Lapsed |