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US3080002A Expired / Lapsed US ⏱️ 0.0 years remaining

Rotor with fixed pylon

Assignee: Doman Helicopters Inc
•
Filing: 1961-06-29
•
Granted: 1963-03-05
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Expires: 1981-06-29
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Abstract

No abstract record available.

Inventors

  • 👤 Pont Stephen Du

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 13:08
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/37; B64C27/41

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 209 words
A ROTOR FOR A SELF SUSTAINING AIRCRAFT TO BE MOUNTED ON A FUSELAGE COMPRISING A BASE INCLUDING A NON-ROTATABLE PYLON, THE PYLON HAVING A BORE THERETHROUGH, MEANS CARRIED BY THE BASE TO FIXEDLY SECURE THE SAME TO A FUSELAGE, A PYLON UNIVERSAL JOINT CARRIED BY THE PYLON; A ROTOR HEAD HAVING A PLURALITY OF BLADES UNIFORMLY SPACED CIRCUMFERENTIALLY AND EACH BLADE HAVING A LONGITUDINAL AXIS, AND MEANS MOUNTING EACH BLADE FOR PIVOTAL MOVEMENT ON THE LONGITUDINAL AXIS OF THE BLADE; MEANS ROTATABLY MOUNTING THE ROTOR HEAD ON THE PYLON UNIVERSAL JOINT, A TUBULAR DRIVE SHAFT ROTATABLY MOUNTED ON THE BASE AND AROUND THE PYLON, MEANS CONNECTED WITH THE DRIVE SHAFT TO ROTATE THE SAME, A DRIVE CONNECTION BETWEEN THE DRIVE SHAFT AND THE ROTOR HEAD PROVIDING TORQUE RIGIDITY AND TILTING FREEDOM FOR THE ROTOR HEAD, A NON-ROTATABLE SWASH PLATE MAST SLIDABLY MOUNTED IN THE BORE OF THE PYLON FOR AXIAL ADJUSTMENT AND EXTENDING ABOVE THE PYLON, MEANS CONNECTED WITH THE MAST TO ADJUST THE SAME, SWASH PLATE MEANS CARRIED ON THE SWASH PLATE MAST ABOVE THE PYLON AND ROTOR HEAD AND HAVING A ROTATABLE SWASH PLATE RING, AND A CONNECTION FOR EACH BLADE BETWEEN THE ROTATABLE SWASH PLATE RING AND THE BLADE TO CONTROL THE PITCH OF ITS BLADE.
Claim 2
Dependent Claim 209 words
A ROTOR FOR A SELF SUSTAINING AIRCRAFT TO BE MOUNTED ON A FUSELAGE COMPRISING A BASE INCLUDING A NON-ROTATABLE PYLON, THE PYLON HAVING A BORE THERETHROUGH, MEANS CARRIED BY THE BASE TO FIXEDLY SECURE THE SAME TO A FUSELAGE, A PYLON UNIVERSAL JOINT CARRIED BY THE PYLON; A ROTOR HEAD HAVING A PLURALITY OF BLADES UNIFORMLY SPACED CIRCUMFERENTIALLY AND EACH BLADE HAVING A LONGITUDINAL AXIS, AND MEANS MOUNTING EACH BLADE FOR PIVOTAL MOVEMENT ON THE LONGITUDINAL AXIS OF THE BLADE; MEANS ROTATABLY MOUNTING THE ROTOR HEAD ON THE PYLON UNIVERSAL JOINT, A TUBULAR DRIVE SHAFT ROTATABLY MOUNTED ON THE BASE AND AROUND THE PYLON, MEANS CONNECTED WITH THE DRIVE SHAFT TO ROTATE THE SAME, A DRIVE CONNECTION BETWEEN THE DRIVE SHAFT AND THE ROTOR HEAD PROVIDING TORQUE RIGIDITY AND TILTING FREEDOM FOR THE ROTOR HEAD, A NON-ROTATABLE SWASH PLATE MAST SLIDABLY MOUNTED IN THE BORE OF THE PYLON FOR AXIAL ADJUSTMENT AND EXTENDING ABOVE THE PYLON, MEANS CONNECTED WITH THE MAST TO ADJUST THE SAME, SWASH PLATE MEANS CARRIED ON THE SWASH PLATE MAST ABOVE THE PYLON AND ROTOR HEAD AND HAVING A ROTATABLE SWASH PLATE RING, AND A CONNECTION FOR EACH BLADE BETWEEN THE ROTATABLE SWASH PLATE RING AND THE BLADE TO CONTROL THE PITCH OF ITS BLADE.

References Cited (Backward Citations)

US2256635A Cited
US2264943A Cited
FR1004417A Cited
US2961051A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1966-03-04 1966-09-03 1967-03-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1970-03-04 1970-09-03 1971-03-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1974-03-04 1974-09-03 1975-03-05 $7700.00 Window Closed / Lapsed

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