Vertical take-off airplanes

• US 3,231,221 A
• Filed: 03/10/1964
• Issued: 01/25/1966
• Est. Priority Date: 03/10/1964
• Status: Expired due to Term

• Current Assignee: Haviland H. Platt
• Original Assignee: Haviland H. Platt
• Inventors: Platt, Haviland H.
• Application Number:
  US04/350,809
• Time in Patent Office: 686 Days
• US Class Current: 244/12.4
• CPC Class Codes: B64C 29/0033 the propellers being tiltable relative to the fuselage

Claims

14. IN A FIXED-WING AIRPLANE, TRANSVERSE COAXIAL PIVOTS AT THE TIPS OF THE WINGS, A STRUCTURE TILTABLY MOUNTED ON EACH OF SAID PIVOTS, EACH OF SAID STRUCTURE SUPPORGING TWO PROPELLERS, THE THRUSTS OF SAID PROPELLERS BEING PARALLEL AND SPACED ONE ON EACH SIDE OF SAID PIVOT AXIS, SHAFTING MEANS INTERCONNECTING SAID PROPELLERS WHEREBY THEY ARE CONSTRAINED TO ROTATE IN UNISON, SAID SHAFTING MEANS COMPRISING A CENTRAL TRANSVERSE SHAFT AND EXTENSION SHAFTS DISPOSED IN V-CONFIGURATIONS OPERATIVELY CONNECTING THE ENDS OF SAID CENTRAL SHAFT WITH THE PROPELLERS, A PLURALITY OF ENGINES SUITABLY DISPOSED TO DRIVE SAID SHAFTING MEANS, OVERRUNNING CLUTCHES INTERPOSED BETWEEN SAID ENGINES AND SAID SHAFTING MEANS WHEREBY SAID PROPELLERS MAY CONTINUE TO ROTATE WITH ONE OR MORE ENGINES DEAD, AND CONTROL MEANS ADAPTED TO VARY THE PITCHES OF SAID PROPPELLERS COLLECTIVLEY AND DIFFERENTIALLY FOR CONTROL OF SAID AIRPLANE.