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Class Information
Number: 244/17.25
Name: Aeronautics > Aircraft, heavier-than-air > Helicopter or auto-rotating wing sustained, i.e., gyroplanes > Lifting rotor having lift direction varying means
Description: Gyroplanes in which the direction of lift of the impeller is variable, either by a cyclic pitch control of the impeller thereby tilting the virtual axis of the impeller or by tilting the real axis of the impeller.

Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
8668162 Apparatus and method for roll moment equalization at high advance ratios for rotary wing aircraft Mar. 11, 2014
8636245 Aircraft Jan. 28, 2014
8615980 Gas turbine engine with noise attenuating variable area fan nozzle Dec. 31, 2013
8590833 Constant-velocity drive system for gimbaled rotor hubs Nov. 26, 2013
8584983 Magnetic de-rotation system for a shaft fairing system Nov. 19, 2013
8565941 Method for compensation of gyroscopic forces of a rotor in a helicopter Oct. 22, 2013
8523103 Retractable lifting blades for aircraft Sep. 3, 2013
8496200 Control flows and forces in VTOL vehicles Jul. 30, 2013
8469307 Rotary wing vehicle Jun. 25, 2013
8444081 High voltage flying apparatus employing multiple motors May. 21, 2013
8408488 Safety flier--a parachute-glider air-vehicle with vertical take-off and landing capability Apr. 2, 2013
8342441 VTOL vehicle with coaxially tilted or tiltable rotors Jan. 1, 2013
8336815 Constant-velocity drive system for gimbaled rotor hubs Dec. 25, 2012
8308522 Flying toy Nov. 13, 2012
8282035 Mechanical device for combining first and second control orders, and an aircraft provided with such a device Oct. 9, 2012
8235324 Rotorcraft with electrically driven blade control Aug. 7, 2012
8226026 Human interface rotor system helicopter (HIR) Jul. 24, 2012
8201772 Method for suppressing vibration and acoustic signature in a tiltrotor aircraft Jun. 19, 2012
8196857 Variable ratio crank for a manual flight control linkage of a rotary wing aircraft Jun. 12, 2012
8196856 Method for suppressing vibration in a tiltrotor aircraft Jun. 12, 2012
8186615 Rotor head of remotely-controlled helicopter and remotely-controlled helicopter May. 29, 2012
8177600 Single rotor model helicopter with improved stability behavior May. 15, 2012
8167234 Insect-like micro air vehicle having perching, energy scavenging, crawling, and offensive payload capabilities May. 1, 2012
8152465 Rotor blade for a rotor airplane Apr. 10, 2012
8096497 Power assembly and a coaxial twin propeller model helicopter using the same Jan. 17, 2012
8070091 Electromechanical actuation system and method Dec. 6, 2011
8056866 Air-vehicle augmented kinesthetic control system Nov. 15, 2011
8047466 Yoke with notched arm roots Nov. 1, 2011
8042763 Rotary wing vehicle Oct. 25, 2011
8021116 Multi-bladed rotor system for rotorcraft Sep. 20, 2011
8011614 Bird vortex flying machine Sep. 6, 2011
7992820 Tandem powered tilt rotor aircraft Aug. 9, 2011
7988089 Swashplate trajectory control Aug. 2, 2011
7891610 Rotary flap Feb. 22, 2011
7871034 Rotor hub systems and methods Jan. 18, 2011
7802755 Rotating wing aircraft with tip-driven rotor and rotor guide-ring Sep. 28, 2010
7766274 Active maple seed flyer Aug. 3, 2010
7757992 System and method for improved rotor tip performance Jul. 20, 2010
7753310 Tandem powered power tilting aircraft Jul. 13, 2010
7677492 Automatic mechanical control of rotor blade collective pitch Mar. 16, 2010
7674091 Rotor blade pitch control Mar. 9, 2010
7658346 Double ducted hovering air-vehicle Feb. 9, 2010
7604198 Rotorcraft having coaxial counter-rotating rotors which produce both vertical and horizontal thrust and method of controlled flight in all six degrees of freedom Oct. 20, 2009
7520466 Gyro-stabilized air vehicle Apr. 21, 2009
7475847 Retractable lifting blades for aircraft Jan. 13, 2009
7461812 Rotorcraft control system with stepped mixing linkage Dec. 9, 2008
7448571 Rotor collective pitch VS Mu to control flapping and mast/rotor tilt to control rotor RPM Nov. 11, 2008
7433765 Fly by wire static longitudinal stability compensator system Oct. 7, 2008
7306186 Tandem powered power tilting aircraft Dec. 11, 2007
7264199 Unloaded lift offset rotor system for a helicopter Sep. 4, 2007

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