ClassID:

72165

B64C27/78 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement in association with pitch adjustment of blades of anti-torque rotor

Recent Application in this class:
#1
20250010984
2025-01-09

VARIABLE BLADE PITCH SYSTEMS AND METHODS

#2
20240124136
2024-04-18

ROTOR HUB SYSTEM WITH ROTATING PITCH CONTROL ACTUATOR

#3
20240124134
2024-04-18

ELECTRIC VTOL AIRCRAFT WITH TILTING PROPELLERS AND LIFTING PROPELLERS

#4
20240083574
2024-03-14

THRUST GENERATING DEVICE

#5
20230406491
2023-12-21

TAIL ROTOR BEARING CONDITION MONITORING

#6
20230286649
2023-09-14

Aircraft turbine engine comprising variable-pitch propeller blades

#7
20220297832
2022-09-22

Transmission unit of an anti-torque rotor for a helicopter

#8
20220227488
2022-07-21

Preventing helicopter loss of tail rotor effectiveness

#9
20220194574
2022-06-23

Tail rotor actuator joint

#10
20220169375
2022-06-02

Tail rotor configurations for rotorcraft yaw control systems

#11
20220144418
2022-05-12

Rotor assemblies for rotorcraft

#12
20210384850
2021-12-09

DISTRIBUTED PROPULSION WITH THERMAL MANAGEMENT

#13
20210380232
2021-12-09

Pitch change linkage

#14
20210300540
2021-09-30

Ducted fans having fluidic thrust vectoring

#15
20210300539
2021-09-30

Ducted fans having edgewise flow augmentation

#16
20210300538
2021-09-30

Fluidic roll control systems for use in forward flight

#17
20210300536
2021-09-30

Low observable aircraft having tandem longitudinal lift fans

#18
20210300531
2021-09-30

Fluidic yaw control systems for use in hover

#19
20210291975
2021-09-23

Method of providing torque protection and/or thrust protection for propellers of a hybrid helicopter, and a hybrid helicopter

#20
20210261244
2021-08-26

Anti-torque rotor for a helicopter

#21
20210221497
2021-07-22

Lightweight low drag rotor pitch beam

#22
20210197963
2021-07-01

Clevis assembly with bearing device in operable communication with a translating element, and fail-safe tail rotor system including the same

#23
20210147073
2021-05-20

Rotor with pitch control apparatus

#24
20200385111
2020-12-10

Counter-rotating tail rotor

#25
20200299003
2020-09-24

Blade angle position feedback system with extended markers

#26
20200262552
2020-08-20

Tail rotor cyclic control for pitch attitude adjustment

#27
20200141482
2020-05-07

Gearbox with integrated submersible lubricant pump

#28
20200031490
2020-01-30

System and method for tail rotor margin awareness

#29
20200023958
2020-01-23

Rotorcraft anti-torque systems and methods therefor

#30
20200023941
2020-01-23

System and method for controlling rotorcraft

#31
20200017207
2020-01-16

ROTARY WING AIRCRAFT WITH ENHANCED YAW CAPABILITY

#32
20200001992
2020-01-02

Redundant helicopter pitch change bearing

#33
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

#34
20190100302
2019-04-04

Counter rotating torque drive for rotary wing vehicle propulsion

#35
20190061926
2019-02-28

Low moment rotor hub

#36
20180340579
2018-11-29

Magnetorheological fluid clutch apparatus and control systems

#37
20180244368
2018-08-30

Pitch control device for a ducted tail rotor of a rotorcraft

#38
20180194462
2018-07-12

Teetering rotor hub system

#39
20180141650
2018-05-24

Axial springs for rotor hub assembly

#40
20180105264
2018-04-19

Rotor blade control horn arrangements

#41
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

#42
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

#43
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

#44
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

#45
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

#46
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

#47
20170259913
2017-09-14

Gimbaled tail rotor hub with spherical elastomeric centrifugal force bearing for blade retention and pitch change articulation

#48
20170253328
2017-09-07

Helicopter anti-torque rotor

#49
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

#50
20170233067
2017-08-17

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

#51
20170225778
2017-08-10

Rotary or fixed wing aircraft with thrust vectoring tail

#52
20170217583
2017-08-03

Rotor blade pitch horn assembly

#53
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

#54
20170217581
2017-08-03

BLADE INDEXING OF A ROTARY WING AIRCRAFT

#55
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

#56
20170203838
2017-07-20

Rotorcraft and associated rotor blade position monitoring system and method

#57
20170057629
2017-03-02

Separation of collective and cyclic actuation

#58
20160333947
2016-11-17

Magnetorheological fluid clutch apparatus and control systems

#59
20160297519
2016-10-13

System for controlling a rotorcraft rotor, a rotorcraft fitted with such a system, and an associated control method

#60
20160114896
2016-04-28

Alternative Fuel Source Vehicle

#61
20150321756
2015-11-12

Rotor Head of Remote Control Helicopter and Remote Control Helicopter

#62
20150267762
2015-09-24

Magnetorheological flight control clutch system

#63
20150217866
2015-08-06

Magnetorheological rotorcraft actuator

#64
20150217865
2015-08-06

Magnetorheological rotorcraft actuation system

#65
20150210382
2015-07-30

Relative acceleration blade position measurement

#66
20150166175
2015-06-18

Rotorcraft fitted with an anti-torque tail rotor that contributes selectively to providing the rotorcraft with lift and with propulsion in translation

#67
20150001337
2015-01-01

Independent hydraulic control system for rotorcraft secondary rotor

#68
20140271203
2014-09-18

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

#69
20140133980
2014-05-15

Blade-pitch control system with indexing swashplate

#70
20130327896
2013-12-12

Rotorcraft yaw piloting system making use of a member of the human-operated type and of a flight control generator of the objective type

#71
20100078524
2010-04-01

Full authority fly-by-wire pedal system

#72
20100072322
2010-03-25

Full authority fly-by-wire pedal system

#73
20070205333
2007-09-06

Full authority fly-by-wire pedal system

#74
20050284983
2005-12-29

Optimized method of controlling yaw for rotary-wing aircraft, and a system for implementing it

#75
18926193
2026-03-17

Helicopter pitch controls

#76
17983111
2023-12-12

Contra-rotating electric helicopter