Patents-Review.com
ClassID:

72136 ⎘

B64C27/54 - CPC Classification

Classification description:

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

Sub-classes:
Recent Application in this class:
#1
20260116537
2026-04-30

Vertical Take-Off and Landing Aircraft

 #2
20250381884
2025-12-18

NESTED CONTROL LOOP STRUCTURE FOR HYBRID PROPULSION SYSTEM

 #3
20250346349
2025-11-13

V/STOL AIRCRAFT

 #4
20250304252
2025-10-02

VERTICAL TAKE-OFF AND LANDING AIRCRAFT

 #5
20250304251
2025-10-02

VERTICAL TAKE-OFF AND LANDING AIRCRAFT

 #6
20250304250
2025-10-02

VERTICAL TAKE-OFF AND LANDING AIRCRAFT

 #7
20250296687
2025-09-25

SYSTEMS, METHODS, AND MECHANICAL DESIGNS FOR INVERTERS FOR EVTOL AIRCRAFT

 #8
20250289563
2025-09-18

INVERTER CIRCUITS AND ELECTRICAL PROPULSION SYSTEMS FOR EVTOL AIRCRAFT

 #9
20250153853
2025-05-15

INVERTER CIRCUITS AND ELECTRICAL PROPULSION SYSTEMS FOR EVTOL AIRCRAFT

 #10
20250145303
2025-05-08

SYSTEMS AND METHODS FOR OIL MANAGEMENT IN GEARBOXES FOR EVTOL AIRCRAFT

 #11
20250145297
2025-05-08

SYSTEMS AND METHODS FOR OIL MAINTENANCE IN GEARBOXES FOR eVTOL AIRCRAFT

 #12
20250121948
2025-04-17

SYSTEMS AND METHODS FOR OIL MANAGEMENT IN GEARBOXES FOR EVTOL AIRCRAFT

 #13
20250066028
2025-02-27

REDUNDANT LOAD PATH FOR A TILTABLE AIRCRAFT COMPONENT

 #14
20250038689
2025-01-30

SYSTEMS, METHODS, AND MECHANICAL DESIGNS FOR INVERTERS FOR EVTOL AIRCRAFT

 #15
20250033782
2025-01-30

SYSTEMS AND METHODS FOR IMPROVED GEARBOXES FOR EVTOL AIRCRAFT

 #16
20240383609
2024-11-21

Systems and methods for improved gearboxes for evtol aircraft

 #17
20240376939
2024-11-14

COVERING SYSTEM AND METHOD FOR A PITCH LINK OF A HELICOPTER

 #18
20240351694
2024-10-24

SYSTEMS, METHODS, AND MECHANICAL DESIGNS FOR INVERTERS FOR EVTOL AIRCRAFT

 #19
20240336358
2024-10-10

ROTORCRAFT AND ROTOR BLADE PART

 #20
20240300659
2024-09-12

Inverter circuits and electrical propulsion systems for eVTOL aircraft

 #21
20240300658
2024-09-12

TILT ROTOR SYSTEMS AND METHODS FOR EVTOL AIRCRAFT

 #22
20240270394
2024-08-15

Systems and methods for oil maintenance in gearboxes for eVTOL aircraft

 #23
20240270393
2024-08-15

SYSTEMS AND METHODS FOR OIL MAINTENANCE IN GEARBOXES FOR eVTOL AIRCRAFT

 #24
20240262518
2024-08-08

Aircraft electric propulsion system with overlapping shafts for gearbox oil distribution

 #25
20240253797
2024-08-01

Systems, methods, and mechanical designs for inverters for eVTOL aircraft

 #26
20240253794
2024-08-01

Systems, methods, and mechanical designs for inverters for eVTOL aircraft

 #27
20240253793
2024-08-01

Systems and methods for oil management in gearboxes for eVTOL aircraft

 #28
20240253791
2024-08-01

Systems and methods for improved gearboxes for evtol aircraft

 #29
20240246685
2024-07-25

SYSTEMS AND METHODS FOR IMPROVED AIRCRAFT ELECTRIC ENGINES

 #30
20240152162
2024-05-09

CONTROL METHOD AND DEVICE OF UNMANNED AERIAL VEHICLE SYSTEM, UNMANNED AERIAL VEHICLE SYSTEM AND STORAGE MEDIUM

 #31
20240140601
2024-05-02

Rotorcraft with a ducted tail rotor supported by a stator

 #32
20240136887
2024-04-25

SYSTEMS AND METHODS FOR ROTOR ASSEMBLIES

 #33
20240117829
2024-04-11

SYSTEMS AND METHODS FOR CONTROLLING TILTING OF TILTABLE COMPONENTS OF EVTOL AIRCRAFT

 #34
20240116643
2024-04-11

Systems and methods for, and components of, gearboxes for eVTOL aircraft

 #35
20240116642
2024-04-11

SYSTEMS AND METHODS FOR, AND COMPONENTS OF, GEARBOXES FOR EVTOL AIRCRAFT

 #36
20240116639
2024-04-11

Systems and methods for oil maintenance in gearboxes for eVTOL aircraft

 #37
20240116628
2024-04-11

Redundant load path for powered lift tilt actuator

 #38
20240109651
2024-04-04

AERIAL VEHICLES, COOPERATIVE FLYING SYSTEMS, AND METHODS OF OPERATING THE SAME

 #39
20240010326
2024-01-11

VEHICLE BASED OPTIMIZATION SYSTEM AND METHOD THEREFOR

 #40
20230415885
2023-12-28

TEETERING PROPULSOR ASSEMBLY OF AN ELECTRIC VERTICAL TAKEOFF AND LANDING AIRCRAFT

 #41
20230348088
2023-11-02

Propulsion unit with foldable propeller blades and method for stopping the propeller in an indexed angular position

 #42
20230103521
2023-04-06

VERTICAL TAKE-OFF AND LANDING AIRCRAFT

 #43
20230058484
2023-02-23

NESTED CONTROL LOOP STRUCTURE FOR HYBRID PROPULSION SYSTEM

 #44
20220355921
2022-11-10

Cyclic pitch angle adjustment apparatus

 #45
20220281592
2022-09-08

UNMANNED AERIAL VEHICLE AND OPERATIONS THEREOF

 #46
20220242558
2022-08-04

Delivery rotary-wing aircraft

 #47
20220194569
2022-06-23

AERIAL VEHICLES, COOPERATIVE FLYING SYSTEMS, AND METHODS OF OPERATING THE SAME

 #48
20220163978
2022-05-26

Vertical take-off and landing aircraft using hybrid electric propulsion system

 #49
20210404516
2021-12-30

Rotor retention fitting with integral bearing and pitch control

 #50
20210403149
2021-12-30

Rotor system with reconfigurable duct

 #51
20210403148
2021-12-30

Vibration isolation systems for compound helicopters

 #52
20210362849
2021-11-25

VERTICAL TAKE-OFF AND LANDING AIRCRAFT

 #53
20210323659
2021-10-21

COMPOUND ROTOR AIRCRAFT

 #54
20210300533
2021-09-30

Techniques for increasing heat dissipation in lead-lag dampers

 #55
20210294355
2021-09-23

Aircraft control system and method

 #56
20210253246
2021-08-19

Electric vertical take-off and landing blended wing-body aircraft

 #57
20210245876
2021-08-12

Tail sitter

 #58
20210245875
2021-08-12

Tail sitter

 #59
20210101677
2021-04-08

Differential blade geometry for rotor assemblies

 #60
20210053675
2021-02-25

IMPROVED MANEUVERABILITY AERIAL VEHICLE AND A METHOD IMPLEMENTED FOR THIS PURPOSE

 #61
20200377207
2020-12-03

Delivery rotary-wing aircraft

 #62
20200333805
2020-10-22

Aircraft control system and method

 #63
20200164971
2020-05-28

Unmanned aerial vehicle and operations thereof

 #64
20200023960
2020-01-23

Vertical takeoff and landing (VTOL) air vehicle

 #65
20190276145
2019-09-12

Rotor assembly having collective pitch control

 #66
20190276141
2019-09-12

Unmanned aerial vehicle and operations thereof

 #67
20190176980
2019-06-13

Dual rotor propulsion systems for tiltrotor aircraft

 #68
20190135411
2019-05-09

Multirotor aircraft with collective for autorotation

 #69
20190112038
2019-04-18

Rotor for a hover-capable aircraft and method for detecting the attitude of a blade with respect to a hub of such a rotor

 #70
20190047689
2019-02-14

Spring system varying stiffness with applied force for use in a torque dependent rotor of a rotary wing aircraft

 #71
20190047688
2019-02-14

Resonant operating rotor assembly

 #72
20190002094
2019-01-03

Unmanned aerial vehicle and operations thereof

 #73
20180339773
2018-11-29

Rotor assembly having a ball joint for thrust vectoring capabilities

 #74
20180339769
2018-11-29

Rotor assembly having collective pitch control

 #75
20180327089
2018-11-15

Tail rotor integrated damper attachment

 #76
20180290741
2018-10-11

Vertical takeoff and landing (VTOL) air vehicle

 #77
20180281935
2018-10-04

Unmanned aerial vehicle and operations thereof

 #78
20180229834
2018-08-16

Unmanned aerial vehicle and operations thereof

 #79
20180201368
2018-07-19

Control rod for adjusting a rotor blade of a helicopter

 #80
20180186447
2018-07-05

Rotor assembly with high lock-number blades

 #81
20180162526
2018-06-14

Proprotor Systems for Tiltrotor Aircraft

 #82
20180162519
2018-06-14

Soft-in-plane proprotor systems

 #83
20180162518
2018-06-14

Loop yoke for proprotor systems

 #84
20180141654
2018-05-24

Proprotor systems for tiltrotor aircraft

 #85
20180093762
2018-04-05

Method and apparatus for aircraft sensor and actuator failure protection using reconfigurable flight control laws

 #86
20180057162
2018-03-01

Aircraft having rotor-to-wing conversion capabilities

 #87
20180057129
2018-03-01

Rotating machines with fluid rotor having adjustable blades

 #88
20170355455
2017-12-14

Vertical takeoff and landing (VTOL) air vehicle

 #89
20170350445
2017-12-07

Compact thrust bearing assemblies, mechanical assemblies including compact thrust bearing assemblies, and methods of providing limited rotational motion in a compact thrust bearing assembly

 #90
20170341771
2017-11-30

Method and a device for assisting the piloting of an aircraft, and an aircraft

 #91
20170320566
2017-11-09

System for driving a slat device of an aircraft wing

 #92
20170297691
2017-10-19

Cylindrical elastomeric bearing with tapered shims

 #93
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

 #94
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

 #95
20170291690
2017-10-12

High trim demand relief

 #96
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

 #97
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

 #98
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

 #99
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

 #100
20170253328
2017-09-07

Helicopter anti-torque rotor

 #101
20170253327
2017-09-07

Adjustable blade-to-hub lead-lag damper attachment

 #102
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

 #103
20170233067
2017-08-17

Independent control for upper and lower rotor of a rotary wing aircraft

 #104
20170220047
2017-08-03

Vector limiting of a rotor control volume

 #105
20170217584
2017-08-03

System and method of operation of twin-tiltrotor helicopter

 #106
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

 #107
20170217581
2017-08-03

BLADE INDEXING OF A ROTARY WING AIRCRAFT

 #108
20170217580
2017-08-03

System for shimming blade fold angle about an axis of rotation

 #109
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

 #110
20170121016
2017-05-04

Unmanned aerial vehicle and operations thereof

 #111
20160272310
2016-09-22

RECONFIGURABLE UNMANNED AIRCRAFT SYSTEM

 #112
20160214712
2016-07-28

Vertical takeoff and landing (VTOL) air vehicle

 #113
20160207621
2016-07-21

Aircraft rotor assembly with composite laminate

 #114
20160159472
2016-06-09

Reconfigurable unmanned aircraft system

 #115
20160059960
2016-03-03

SEMI-AUTOMATIC COLLECTIVE PITCH MECHANISM FOR A ROTORCRAFT

 #116
20160052626
2016-02-25

Hybrid gyrodyne aircraft employing a managed autorotation flight control system

 #117
20160031558
2016-02-04

Unmanned aerial vehicle and operations thereof

 #118
20160023751
2016-01-28

ENERGY HARVESTING MECHANISM FOR GYROPLANES AND GYROCOPTERS

 #119
20150375858
2015-12-31

Automatic pitch change rotary wing rotor system and method of rotor control

 #120
20150360773
2015-12-17

Helicopter rotor with a mechanical means for configuring rotor tips to control brown outs

 #121
20150336664
2015-11-26

Adjustable blade-to-hub lead-lag damper attachment

 #122
20150307188
2015-10-29

Rotor including a lead/lag abutment mechanism, and an aircraft

 #123
20150298801
2015-10-22

Stiff inplane elastomeric rotorhead

 #124
20150284077
2015-10-08

Modular rotor craft rotor hub system

 #125
20150211573
2015-07-30

Hybrid spherical and thrust bearing

 #126
20150210382
2015-07-30

Relative acceleration blade position measurement

 #127
20150069175
2015-03-12

Rotor position determination system with magneto-resistive sensors

 #128
20150060597
2015-03-05

Dual series pitch link bearing

 #129
20150050142
2015-02-19

Controlling rotor blades of a swashplateless rotor

 #130
20150014475
2015-01-15

Vertical Takeoff and Landing (VTOL) Air Vehicle

 #131
20150001337
2015-01-01

Independent hydraulic control system for rotorcraft secondary rotor

 #132
20140365039
2014-12-11

System and method for maximizing aircraft safe landing capability during one engine inoperative operation

 #133
20140316615
2014-10-23

Method and apparatus for aircraft sensor and actuator failure protection using reconfigurable flight control laws

 #134
20140255203
2014-09-11

Hybrid spinner support

 #135
20140169967
2014-06-19

HELICOPTER WITH ROTOR BLADE LOAD CONTROL METHOD AND DEVICE

 #136
20140147245
2014-05-29

Monitoring and control system

 #137
20140077025
2014-03-20

Pilot control system with adjustable pedals

 #138
20140064960
2014-03-06

Actuation system for an active element in a rotor blade

 #139
20140064914
2014-03-06

Control rod device

 #140
20130341458
2013-12-26

Hybrid spherical and thrust bearing

 #141
20130280076
2013-10-24

Connection joint for attaching an airfoil blade to a helicopter's bearingless main rotor

 #142
20120308384
2012-12-06

Twist mechanism for twisting a rotor blade for a rotorcraft, and a blade

 #143
20120255386
2012-10-11

Control lever for controlling a rotary wing, a mechanical control system including said control lever, and an aircraft

 #144
20120072056
2012-03-22

Flight control system for rotary wing aircraft

 #145
20110211959
2011-09-01

Blade with adaptive twisting, and a rotor provided with such a blade

 #146
20110180656
2011-07-28

Method and apparatus for aircraft sensor and actuator failure protection using reconfigurable flight control laws

 #147
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

 #148
20100308155
2010-12-09

Helicopter, rotor thereof, and control method thereof

 #149
20080283671
2008-11-20

Engine anticipation for rotary-wing aircraft

 #150
20060186263
2006-08-24

Rotor, rotocraft comprising a rotor of this type and method for adjusting the blade angle of a rotor

 #151
18810158
2026-05-05

Scissoring mechanisms deploying at low speed

 #152
18648157
2025-07-01

Electric propulsor with folding propeller

 #153
18098417
2023-11-21

Tilt rotor systems and methods for eVTOL aircraft

 #154
17948135
2024-09-17

Scissoring mechanisms deploying at low speed

 #155
17852229
2023-05-09

Teetering propulsor assembly of an electric vertical takeoff and landing aircraft

 #156
17824309
2023-06-13

Systems and devices for parking a propulsor teeter

 #157
17367752
2022-12-06

Auto rotating canister

 #158
14121022
2016-03-29

Multi-rotor helicopter

 #159
13999366
2015-12-08

Apparatus and method for roll moment equalization at high advance ratios for rotary wing aircraft