ClassID:

72134

B64C27/51 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto Damping of blade movements

Recent Application in this class:
#1
20240140599
2024-05-02

Blade provided with a root comprising an integrated pitch attachment and two integrated damper attachments, and a rotor provided with such a blade

#2
20230264839
2023-08-24

Active propeller system

#3
20230108395
2023-04-06

FAST RESPONSE ROTOR SYSTEM

#4
20220388641
2022-12-08

Single-blade aircraft rotor

#5
20220227486
2022-07-21

Rotor systems having lead-lag damper cooling

#6
20220042569
2022-02-10

Lead-lag damper

#7
20210316850
2021-10-14

Rotor blade lead-lag hydraulic damper with centrifugal force compensating damping characteristics

#8
20210300533
2021-09-30

Techniques for increasing heat dissipation in lead-lag dampers

#9
20210253231
2021-08-19

Propeller assemblies, aircraft including the same, and associated methods

#10
20200398979
2020-12-24

Low-drag fairing and rotor assembly

#11
20200391860
2020-12-17

Active sail blade

#12
20200298968
2020-09-24

Rotor for a hover-capable aircraft and method for containment of vibrations transmitted to the mast of a rotor of a hover-capable aircraft

#13
20200292410
2020-09-17

METHOD AND SYSTEM FOR DETERMINING ROTOR STATES

#14
20200283137
2020-09-10

Self-balancing propeller assembly

#15
20200255120
2020-08-13

Rotorcraft service fixtures

#16
20200156775
2020-05-21

Variable-pitch ringed rotors for aircraft

#17
20200140074
2020-05-07

System and method for frequency domain rotor mode decomposition

#18
20190344884
2019-11-14

Rotor hub

#19
20190322363
2019-10-24

Articulated rotor systems with blade-to-blade damping

#20
20190300163
2019-10-03

Hydro-elastic damper and an aircraft

#21
20190263514
2019-08-29

Passive pitch angle adjustment apparatus

#22
20190112041
2019-04-18

Rotor assembly with composite static mast

#23
20190092460
2019-03-28

Rotor Hub with Blade-to-Blade Dampers and Axisymmetric Elastomeric Spherical Bearings

#24
20190077502
2019-03-14

Rotor hub with structural reinforcements

#25
20190061931
2019-02-28

Vibration control with active lag damper

#26
20190047728
2019-02-14

Vibration absorbing device for flexbeams

#27
20190002085
2019-01-03

Articulated rotor systems with pitch independent damping

#28
20180327089
2018-11-15

Tail rotor integrated damper attachment

#29
20180229836
2018-08-16

Blade damper with a magnetic contaminants trap

#30
20180202506
2018-07-19

Hydraulic damping valve

#31
20180186447
2018-07-05

Rotor assembly with high lock-number blades

#32
20180162526
2018-06-14

Proprotor Systems for Tiltrotor Aircraft

#33
20180162520
2018-06-14

Soft-in-plane proprotor systems

#34
20180162519
2018-06-14

Soft-in-plane proprotor systems

#35
20180162518
2018-06-14

Loop yoke for proprotor systems

#36
20180141654
2018-05-24

Proprotor systems for tiltrotor aircraft

#37
20180111681
2018-04-26

ROTOR DAMPERS

#38
20180105265
2018-04-19

Lead-lag damper integrated inside a blade of a rotor

#39
20180002008
2018-01-04

Thrust-generating rotor assembly

#40
20180002006
2018-01-04

Rotor and an aircraft provided with such a rotor

#41
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

#42
20170297690
2017-10-19

Hub separation in dual rotor rotary wing aircraft

#43
20170291702
2017-10-12

Collective to elevator mixing of a rotary wing aircraft

#44
20170283051
2017-10-05

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

#45
20170283047
2017-10-05

Main rotor rotational speed control for rotorcraft

#46
20170275014
2017-09-28

Rotorcraft rotor and propeller speed

#47
20170274994
2017-09-28

Gearbox for a dual rotor, rotary wing aircraft

#48
20170274987
2017-09-28

Single collective stick for a rotary wing aircraft

#49
20170267340
2017-09-21

Damage tolerant and fail-safe (DTFS) high strength preloaded pin assembly

#50
20170267339
2017-09-21

Damage tolerant and fail-safe (DTFS) high strength preloaded pin assembly

#51
20170259916
2017-09-14

Soft in-plane and stiff out-of-plane rotor system

#52
20170253327
2017-09-07

Adjustable blade-to-hub lead-lag damper attachment

#53
20170233068
2017-08-17

Lift offset control of a rotary wing aircraft

#54
20170233067
2017-08-17

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

#55
20170217582
2017-08-03

Dual rotor, rotary wing aircraft

#56
20170210463
2017-07-27

Tip clearance measurement of a rotary wing aircraft

#57
20170190414
2017-07-06

Rotor damping

#58
20170129598
2017-05-11

Rotor blade coupling device of a rotor head for a rotorcraft

#59
20170122290
2017-05-04

Turbine blade arrangement

#60
20170081024
2017-03-23

Lead-lag dampers and assemblies for an articulated rotor and methods for operation

#61
20170043868
2017-02-16

Damper device and an aircraft

#62
20160290428
2016-10-06

Device for rotary wing aircraft capable of providing information relative to the level of fatigue-related damage of said device

#63
20160200434
2016-07-14

Rotor head for a vertical takeoff and landing aircraft

#64
20160167779
2016-06-16

Laminated ball joint connection device between a rotorcraft rotor blade and a lead/lag damper of said blade

#65
20160152332
2016-06-02

Rotorcraft tail rotor, a rotorcraft fitted with such a tail rotor, and a method of statically and/or dynamically balancing a rotorcraft tail rotor

#66
20160083088
2016-03-24

Vibration control with active lag damper

#67
20160052648
2016-02-25

Vibration absorbing device for flexbeams

#68
20160017954
2016-01-21

Rotary dampers, systems, and related methods

#69
20150336664
2015-11-26

Adjustable blade-to-hub lead-lag damper attachment

#70
20150308535
2015-10-29

Damping mechanical linkage

#71
20150307188
2015-10-29

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

#72
20150267771
2015-09-24

Hybrid fluid elastomeric damper

#73
20150251753
2015-09-10

Articulated main rotor hub with inwardly CF bearing and 3% flapping hinge offset

#74
20150210382
2015-07-30

Relative acceleration blade position measurement

#75
20150176658
2015-06-25

Rotor hub damper for a rotorcraft

#76
20150093245
2015-04-02

MOTION CONTROLLED HELICOPTER AND ROTATION RATE SWITCHED FLUID LEAD LAG DAMPER

#77
20150086365
2015-03-26

Retractable composite rotor blade assembly

#78
20150014477
2015-01-15

Vibration reducing apparatus

#79
20140305755
2014-10-16

Elastomeric damper with heater

#80
20140271197
2014-09-18

Frequency adapter and return means suitable for being arranged in such a frequency adapter

#81
20140271182
2014-09-18

Soft in-plane and stiff out-of-plane rotor system

#82
20140262645
2014-09-18

Hybrid fluid elastomeric damper

#83
20140178199
2014-06-26

System and method for linkage length adjustment

#84
20140174402
2014-06-26

Dual fuel system having a damper

#85
20140112785
2014-04-24

Separable blade attachment for a bearingless rotor of a helicopter

#86
20140017085
2014-01-16

Rotorcraft rotor fitted with lead-lag dampers housed in sleeves connecting blades to a hub of the rotor

#87
20140001310
2014-01-02

Damping mechanical linkage

#88
20130308426
2013-11-21

Deployable ground sensors

#89
20130243597
2013-09-19

Device for monitoring the flapping and/or lag behavior of a blade of a rotorcraft rotor

#90
20130241124
2013-09-19

Dual frequency damper for an aircraft

#91
20130224507
2013-08-29

Vibration absorbing device for flexbeams

#92
20130189098
2013-07-25

System and method of harvesting power with a rotor hub damper

#93
20130164131
2013-06-27

Fluid elastomeric damper assembly including internal pumping mechanism and control valve

#94
20130121827
2013-05-16

Dual mode rotor hub assembly

#95
20130084183
2013-04-04

Dual series damper system

#96
20130048127
2013-02-28

Temperature adaptive fluid damping system

#97
20130034442
2013-02-07

Lead lag damper for helicopter rotor unit

#98
20120269630
2012-10-25

Rotor damper device, and an associated rotor and aircraft

#99
20120256055
2012-10-11

Aircraft rotary wing motion control and instrumented motion control fluid device

#100
20120230823
2012-09-13

Dual spring rate damper

#101
20120195760
2012-08-02

Lead-lag damper device to limit an end-of-stroke force peak

#102
20120148409
2012-06-14

Rotor damper and tail rotor with such a rotor damper

#103
20120141276
2012-06-07

FREQUENCY-DEPENDENT DAMPER AND ROTARY WING SYSTEM

#104
20120051909
2012-03-01

FLUID ELASTOMERIC DAMPER ASSEMBLY

#105
20110243734
2011-10-06

Lead stop for rotor system with fluid-elastomeric lead/lag damper

#106
20110236209
2011-09-29

Blade damper, and a rotor fitted with such a damper

#107
20110052395
2011-03-03

FREQUENCY ADAPTER AND RETURN MEANS SUITABLE FOR BEING ARRANGED IN SUCH A FREQUENCY ADAPTER

#108
20110027083
2011-02-03

Lead-lag damper for rotor hubs

#109
20100308155
2010-12-09

Helicopter, rotor thereof, and control method thereof

#110
20100247312
2010-09-30

Blade provided with a drag damper, and a rotor provided with such a blade

#111
20100247288
2010-09-30

Fluid elastomeric damper assembly including internal pumping mechanism and volume compensator

#112
20100215496
2010-08-26

Helicopter rotor

#113
20100163668
2010-07-01

Helicopter rotor

#114
20100104437
2010-04-29

Retractable composite rotor blade assembly

#115
20090324407
2009-12-31

Blade provided with a resonator to reduce the drag movements of said blade, and a method implemented by said blade

#116
20090324406
2009-12-31

Blade for reducing the drag movements of said blade, and a method of reducing such a drag movement

#117
20090224449
2009-09-10

Damping device and aircraft rotor system incorporating it

#118
20090218443
2009-09-03

Magnetorheological fluid elastic lag damper for helicopter rotors

#119
20090180882
2009-07-16

System and method of damping a 1P motion

#120
20090110555
2009-04-30

Helicopter aircraft vehicle rotor damper

#121
20080247876
2008-10-09

Soft in-plane tiltrotor hub

#122
20080159862
2008-07-03

To rotorcraft rotors fitted with inter-blade dampers

#123
20080069695
2008-03-20

Rotary wing aircraft rotary lead lag damper

#124
20080044283
2008-02-21

Elastomeric bearing with heatable shims

#125
20080003106
2008-01-03

Rotor apparatus and methods for vertical lift aircraft

#126
20070273075
2007-11-29

Fluid-elastomeric damper assembly including internal pumping mechanism

#127
20070137956
2007-06-21

Dual spring rate damper

#128
20070071602
2007-03-29

Rotorcraft rotor with blades hinged in flap and in lag

#129
20060222505
2006-10-05

Rotor system vibration absorber

#130
20060120873
2006-06-08

Damper positioner for a rotor blade folding system

#131
20060067823
2006-03-30

Helicopter rotor

#132
20060056973
2006-03-16

Method of controlling vibration damping in a helicopter, and apparatus implementing the method

#133
20050146087
2005-07-07

Fluid-elastomeric damper assembly including internal pumping mechanism

#134
14473469
2016-01-12

Elastomer having tear reducing contoured edges