ClassID:

72147

B64C27/72 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement Means acting on blades

Sub-classes:
Recent Application in this class:
#1
20250242911
2025-07-31

Cable Tilt Actuator for an Aircraft

#2
20250223029
2025-07-10

HYBRID PITCH BEARING FOR RIGID ROTOR

#3
20250206444
2025-06-26

HELICOPTER ROTOR HEAD STRUCTURE

#4
20250145282
2025-05-08

COLLECTIVE CONTROL USING VERTICAL VELOCITY

#5
20250100680
2025-03-27

BLADE POSITION CONTROL SYSTEM

#6
20250091713
2025-03-20

VARYING A PITCH OF A TILTROTOR

#7
20240417070
2024-12-19

SYSTEMS AND METHODS FOR VERTICAL TAKEOFF AND LANDING VEHICLE WITH STATOR STABILIZATION

#8
20240400199
2024-12-05

FIXED WING ROTORCRAFT

#9
20240375771
2024-11-14

Compliant helicopter rotor pitch link

#10
20240353863
2024-10-24

FLIGHT-ENABLED SIGNAL BEACON

#11
20240329662
2024-10-03

CONTROL DEVICE, AIRCRAFT, AND CONTROL METHOD

#12
20240328327
2024-10-03

Rotary-wing vehicle, and rotary-wing turbine

#13
20240270381
2024-08-15

ANTI-TORQUE ROTOR FOR A HELICOPTER

#14
20240270380
2024-08-15

ANTI-TORQUE ROTOR FOR A HELICOPTER

#15
20240208645
2024-06-27

Anti-Backlash Flight Control Actuator System

#16
20240059412
2024-02-22

ROTOR SYSTEM WITH BELT DRIVEN PROPULSION AND STOWING

#17
20240002049
2024-01-04

Cable tilt actuator for an aircraft

#18
20240002046
2024-01-04

Rotary wing air vehicle

#19
20230322363
2023-10-12

HELICOPTER FORCE FEEDBACK SYSTEM

#20
20230249817
2023-08-10

Rotor system with belt driven propulsion and stowing

#21
20230192284
2023-06-22

MAST DAMPENER FOR A ROTORCRAFT

#22
20230192280
2023-06-22

Rotor assembly connectable to rotor hub and having pitch control

#23
20230159159
2023-05-25

SYSTEMS AND METHODS FOR IMPROVED ROTOR ASSEMBLY FOR USE WITH A STATOR

#24
20230142439
2023-05-11

Rotor blade pitch trajectory control

#25
20220355923
2022-11-10

HIGH-SPEED, VERTICAL TAKE-OFF AND LANDING AIRCRAFT

#26
20220355921
2022-11-10

Cyclic pitch angle adjustment apparatus

#27
20220340272
2022-10-27

Anti-torque rotor for a helicopter

#28
20220306290
2022-09-29

CONTROL SYSTEM FOR CONTROLLING AT LEAST ONE PROPELLER OF A COMPOUND ROTORCRAFT, ASSOCIATED COMPOUND ROTORCRAFT AND CONTROL METHOD

#29
20220274693
2022-09-01

Motor unit and aircraft

#30
20220266994
2022-08-25

Individual blade control system for rotorcraft

#31
20220219815
2022-07-14

Unmanned Aerial Drone Crane

#32
20220144429
2022-05-12

Flight-enabled signal beacon

#33
20220024570
2022-01-27

Flap drive device and blades of rotary-wing aircraft

#34
20210396247
2021-12-23

Tip gap control systems with active blade tips

#35
20210380232
2021-12-09

Pitch change linkage

#36
20210253230
2021-08-19

Rotor for a hover-capable aircraft and related method of control

#37
20210253229
2021-08-19

Rotor for a hover-capable aircraft and related method of control

#38
20210229802
2021-07-29

Fail-operational VTOL aircraft

#39
20210114722
2021-04-22

Linear actuator

#40
20210094684
2021-04-01

Light communication slip ring

#41
20210070435
2021-03-11

Electromechanical actuator for setting a collective offset for a helicopter on a blade-specific basis

#42
20210070429
2021-03-11

Free propeller assembly structure and aircraft structure having the same

#43
20200290733
2020-09-17

System and method for rotorcraft autorotation entry assist

#44
20200283132
2020-09-10

Systems and methods for reducing noise based on effective rotor area relative to a center of rotation

#45
20200278082
2020-09-03

Lubricant level sensing for an actuator

#46
20200277067
2020-09-03

Systems and methods for maintaining levitation of a rotor relative to a stator

#47
20200172233
2020-06-04

Systems and methods for controlling lift using contra-rotating rotors

#48
20200161991
2020-05-21

Systems and methods for dynamically triggering independent stator coils to control pitch of a rotor blade

#49
20200156783
2020-05-21

Cyclorotor thrust control, transmission and mounting system

#50
20200156779
2020-05-21

Systems and methods for independent pitch control of rotor blades of rotor assembly to achieve directional control

#51
20200148342
2020-05-14

Systems and methods for improved rotor assembly for use with a stator

#52
20200148333
2020-05-14

Systems and methods for drive control of a magnetically levitated rotor

#53
20200130824
2020-04-30

Device for directly controlling a blade by means of an electromechanical actuator

#54
20200130823
2020-04-30

Active counterweight for main rotor

#55
20200122828
2020-04-23

Unmanned aerial vehicle

#56
20200102073
2020-04-02

Mast Dampener and Collective Pitch for a Rotocraft

#57
20200023952
2020-01-23

Propelling system with variable aerodynamic controls

#58
20190389570
2019-12-26

Electric powered direct drive rotor motor with integrated mechanical flight control

#59
20190310025
2019-10-10

Cooling system for heat generating components in a fairing

#60
20190263514
2019-08-29

Passive pitch angle adjustment apparatus

#61
20190250642
2019-08-15

Servo, control method, and unmanned aerial vehicle

#62
20190248482
2019-08-15

System and method for rotorcraft autorotation entry assist

#63
20190210718
2019-07-11

Foldable rotor blade assembly and aerial vehicle with a foldable rotor blade assembly

#64
20190193850
2019-06-27

Rotor for a hover-capable aircraft and related method of control

#65
20190168867
2019-06-06

System for transmitting and processing data for controlling a rotor blade actuator

#66
20190127058
2019-05-02

Swash plate system for helicopter rotor

#67
20190100300
2019-04-04

Rotor hub with blade-to-blade dampers attached to the pitch change axis

#68
20190063574
2019-02-28

Summing and fault tolerant rotary actuator assembly

#69
20190031332
2019-01-31

A ROTOR SYSTEM AND AN AIR VEHICLE EQUIPPED WITH SUCH ROTOR

#70
20190023388
2019-01-24

Proprotor flapping control systems for tiltrotor aircraft

#71
20190017750
2019-01-17

Cooling system for rotor blade actuators

#72
20190009898
2019-01-10

Pitch horn assembly

#73
20180346111
2018-12-06

Use of individual blade control on a propeller or rotor in axial flight for the purpose of aerodynamic braking and power response modulation

#74
20180319492
2018-11-08

ROTOR BLADE STRUCTURES

#75
20180257766
2018-09-13

Rotor assembly apparatus

#76
20180244368
2018-08-30

Pitch control device for a ducted tail rotor of a rotorcraft

#77
20180194462
2018-07-12

Teetering rotor hub system

#78
20180111681
2018-04-26

ROTOR DAMPERS

#79
20180072410
2018-03-15

VTOL ROTOR ASSEMBLY WITH STOWABLE BLADES

#80
20180002008
2018-01-04

Thrust-generating rotor assembly

#81
20170341744
2017-11-30

Main rotor trim tab retention system, an aircraft employing same and a method of replacing a trim tab assembly from blade housing

#82
20170336024
2017-11-23

Lubricant level sensing for an actuator

#83
20170320567
2017-11-09

Rotor assembly with high lock-number blades

#84
20170283051
2017-10-05

Method of manufacturing a control cuff for a rotor blade of a hinge and bearingless rotor

#85
20170274976
2017-09-28

COMPLIANT STRUCTURE DESIGN FOR VARYING SURFACE CONTOURS

#86
20170203829
2017-07-20

Systems for shape memory alloy structures

#87
20170183089
2017-06-29

Rotor blade system

#88
20170152034
2017-06-01

Helicopter

#89
20170057628
2017-03-02

Ganged servo flight control system for an unmanned aerial vehicle

#90
20170021922
2017-01-26

Rotor phase control

#91
20160257399
2016-09-08

MAST DAMPENER AND COLLECTIVE PITCH FOR A ROTORCRAFT

#92
20160233410
2016-08-11

Self-latching piezocomposite actuator

#93
20160221673
2016-08-04

Electro-hydraulic on-blade actuation system

#94
20160167777
2016-06-16

Rotor assembly apparatus

#95
20160159475
2016-06-09

Individual blade control utilizing pneumatic muscles

#96
20160152331
2016-06-02

ROTOR OF AN AIRCRAFT COMPRISING A HELICAL ACTUATOR

#97
20160101851
2016-04-14

Anti-drive mechanism for rise and fall rotating control systems

#98
20160090177
2016-03-31

Methods and apparatus to control pitch and twist of blades

#99
20160053620
2016-02-25

Actuator lock

#100
20160001881
2016-01-07

Mission-adaptive rotor blade with circulation control

#101
20150314855
2015-11-05

Coaxial rotor low-speed mixing

#102
20150225078
2015-08-13

Rotor drive system

#103
20150210376
2015-07-30

Compliant structure design for varying surface contours

#104
20150197336
2015-07-16

Cyclic blade speed control

#105
20150175259
2015-06-25

Rotor hub for a rotorcraft

#106
20150104314
2015-04-16

Adaptively-twistable blade, and an aircraft including such a blade

#107
20150104307
2015-04-16

Actuation system for an active blade element of a rotor blade

#108
20150102158
2015-04-16

Coaxial rotor yaw control

#109
20150028597
2015-01-29

Swashplateless coaxial rotary wing aircraft

#110
20150010401
2015-01-08

Flexbeam hinge for helicopter blade active trailing edge flap

#111
20140314573
2014-10-23

Integration of rotary electrical actuator for swashplateless individual blade control

#112
20140314563
2014-10-23

Vibration control of a swashplateless coaxial rotor

#113
20140314130
2014-10-23

Harmonic data transfer in rotary wing aircraft

#114
20140271203
2014-09-18

Swashplateless active blade pitch control with a mechanical delta-3 restraint having an instantaneous blade pitch-flap coupling response

#115
20140255184
2014-09-11

System and method for reducing rotor blade noise

#116
20140234104
2014-08-21

Rotor blade with control flap

#117
20140234102
2014-08-21

Radial fluid device with variable phase and amplitude

#118
20140231579
2014-08-21

Radial fluid device with multi-harmonic output

#119
20140217235
2014-08-07

Actuator arrangement and control surface arrangement, especially for an aircraft

#120
20140064962
2014-03-06

Electromechanical linear actuator for in blade rotor control

#121
20140034779
2014-02-06

Independent blade control system with hydraulic cyclic control

#122
20140034778
2014-02-06

Independent blade control system with rotary blade actuator

#123
20140034777
2014-02-06

Independent blade control system with hydraulic pitch link

#124
20130336787
2013-12-19

Dry lubricated linear actuator for in blade rotor control

#125
20130327879
2013-12-12

High speed compound rotary wing aircraft

#126
20130294914
2013-11-07

Multi-element rotor blade

#127
20130259681
2013-10-03

Enhanced performance rotorcraft rotor blade

#128
20130168491
2013-07-04

Mission-adaptive rotor blade with circulation control

#129
20130064666
2013-03-14

Active twist hollow beam system

#130
20130062456
2013-03-14

Reconfigurable rotor blade

#131
20130058793
2013-03-07

System for heat dissipation from an internal actuator in a rotor blade

#132
20120263590
2012-10-18

Rotary wing blade, rotor comprising at least two of such blades and method to implement such a rotor

#133
20120153073
2012-06-21

Mission-adaptive rotor blade

#134
20120116612
2012-05-10

Implementation of Kalman filter linear state estimator for actuator equalization

#135
20120070288
2012-03-22

Rotor blade with integrated passive surface flap

#136
20120070279
2012-03-22

Cyclic blade speed control apparatus and method

#137
20110266391
2011-11-03

Fluidic artificial muscle actuation system for trailing-edge flap

#138
20110236208
2011-09-29

ROTARY WING BLADE, A ROTARY WING INCLUDING SUCH A BLADE, AND AN AIRCRAFT

#139
20110164979
2011-07-07

Mechanical system for high acceleration environments

#140
20110143628
2011-06-16

Directionally controllable flying vehicle and a propeller mechanism for accomplishing the same

#141
20110059672
2011-03-10

Directionally controllable flying vehicle and a propeller mechanism for accomplishing the same

#142
20110058955
2011-03-10

ROTOR BLADE FOR ROTARY WING AIRCRAFT HAVING DEFORMABLE PROTRUSIONS TO REDUCE BLADE VORTEX INTERACTION NOISE

#143
20110027082
2011-02-03

Method of reducing or even eliminating the vibration of a rotorcraft lift and propulsion rotor, and an airfoil assembly and a rotor implementing said method

#144
20100213320
2010-08-26

Device which is subject to fluid flow

#145
20100065679
2010-03-18

Strain energy shuttle apparatus and method

#146
20090302168
2009-12-10

Compliant structure design of varying surface contours

#147
20090269199
2009-10-29

Swashplateless helicopter blade actuation system

#148
20080203222
2008-08-28

Yaw control system and method

#149
20080101931
2008-05-01

Brushless direct current (BLDC) motor based linear or rotary actuator for helicopter rotor control

#150
20080044283
2008-02-21

Elastomeric bearing with heatable shims

#151
20070128026
2007-06-07

Rotorcraft blade provided with a tiltable flap

#152
20070098554
2007-05-03

Rotorcraft blade provided with a tiltable flap and a fastener tongue

#153
20060049302
2006-03-09

Apparatus and methods for structurally-integrated conductive conduits for rotor blades

#154
20060038058
2006-02-23

Active control of airfoils

#155
20050022619
2005-02-03

Strain energy shuttle apparatus and method

#156
18220720
2024-07-30

Rotor system for electrically powered rotorcraft

#157
17657948
2024-01-09

Helicopter with coaxial counter-rotating roller driven rotors

#158
16158146
2021-11-02

Anti-sound production using adjustable propeller blades

#159
15727735
2019-10-08

Pneumatically actuated trim tab system on a rotating blade

#160
14975308
2019-08-06

Adjustable propeller blade with sound flaps

#161
14975302
2019-05-14

Adjustable propeller blades for sound control

#162
14052488
2015-03-31

Helicopter with blade-tip thrusters and annular centrifugal fuel supply tank and concentric cabin and fuselage

#163
13199705
2015-03-10

Blade root attachment apparatus and method

#164
13199677
2015-01-27

Anemometer drive apparatus and method