US3335979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: BE Wallace Developments Inc
•
Filing: 1965-10-22
•
Granted: 1967-08-15
•
Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 Kurkjian Haig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:11
CPC Classifications
B; B64; B64D; B64D35/00; B64D35/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
161 words
PROPELLER DRIVE MEANS FOR AIRCRAFT OR THE LIKE HAVING A PLURALITY OF PROPELLERS, COMPRISING A PLURALITY OF ENGINES FOR ROTATING THE RESPECTIVE PROPELLERS, A FRAME SUPPORTING THE ENGINES, A FIRST ONE OF THE ENGINES HAVING A FIRST DRIVE SHAFT FOR MOUNTING A FIRST PROPELLER ROTATABLY ABOUT AN AXIS, A SECOND ONE OF THE ENGINES HAVING A SECOND DRIVE SHAFT FOR INTERCONNECTION TO A SECOND PROPELLER ROTATABLE ABOUT THE SAME AXIS AS THE FIRST PROPELLER BUT SPACED THEREFROM ALONG THE AXIS, A SLEEVE COAXIAL WITH THE FIRST DRIVE MEANS INTERCONNECTED TO THE SECOND PROPELLER, ROTATIONAL DRIVE MEANS INTERCONNECTED TO THE SECOND DRIVE SHAFT, CONTIGUOUS ROTATIONAL DRIVEN MEANS INTERCONNECTED TO THE SLEEVE, AND STAY MEANS INTERCONNECTED TO THE SLEEVE AND SUBJECT TO AN INCREASE OF TENSION THEREIN BY VIRTUE OF THE THRUST OF THE SECOND PROPELLER, THE STAY MEANS BEING EFFECTIVE TO URGE THE ROTATIONAL DRIVE MEANS AND ROTATIONAL DRIVEN MEANS INTO TIGHTER ROTATIONAL CONTACT WITH ONE ANOTHER UPON OCCURRENCE OF SUCH THRUST.
Claim 2
Dependent Claim
161 words
PROPELLER DRIVE MEANS FOR AIRCRAFT OR THE LIKE HAVING A PLURALITY OF PROPELLERS, COMPRISING A PLURALITY OF ENGINES FOR ROTATING THE RESPECTIVE PROPELLERS, A FRAME SUPPORTING THE ENGINES, A FIRST ONE OF THE ENGINES HAVING A FIRST DRIVE SHAFT FOR MOUNTING A FIRST PROPELLER ROTATABLY ABOUT AN AXIS, A SECOND ONE OF THE ENGINES HAVING A SECOND DRIVE SHAFT FOR INTERCONNECTION TO A SECOND PROPELLER ROTATABLE ABOUT THE SAME AXIS AS THE FIRST PROPELLER BUT SPACED THEREFROM ALONG THE AXIS, A SLEEVE COAXIAL WITH THE FIRST DRIVE MEANS INTERCONNECTED TO THE SECOND PROPELLER, ROTATIONAL DRIVE MEANS INTERCONNECTED TO THE SECOND DRIVE SHAFT, CONTIGUOUS ROTATIONAL DRIVEN MEANS INTERCONNECTED TO THE SLEEVE, AND STAY MEANS INTERCONNECTED TO THE SLEEVE AND SUBJECT TO AN INCREASE OF TENSION THEREIN BY VIRTUE OF THE THRUST OF THE SECOND PROPELLER, THE STAY MEANS BEING EFFECTIVE TO URGE THE ROTATIONAL DRIVE MEANS AND ROTATIONAL DRIVEN MEANS INTO TIGHTER ROTATIONAL CONTACT WITH ONE ANOTHER UPON OCCURRENCE OF SUCH THRUST.
References Cited (Backward Citations)
US1394870A
Cited
US1779644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |