B64C27/41 - CPC Classification Index

ClassID:

72123 ⎘

B64C27/41 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Rotors having articulated joints with flapping or universal joint, common to the blades

Sub-classes:

B64C27/43 » see-saw type, i.e. two-bladed rotor 19

Recent Application in this class:

20260109457

2026-04-23

FOUR-BAR FLAPPING ROTORS FOR AIRCRAFT AND ASSOCIATED METHODS

20250269952

2025-08-28

FOUR-BAR FLAPPING ROTORS FOR AIRCRAFT AND ASSOCIATED METHODS

20250093878

2025-03-20

MULTICOPTER WITH SELF-ADJUSTING ROTORS

20240045446

2024-02-08

Multicopter with self-adjusting rotors

20230339601

2023-10-26

ROTOR ASSEMBLY

20210371094

2021-12-02

Bearingless gimbaled rotor hubs and swashplates

20210070432

2021-03-11

Elastomeric double Hooke's joint

20200407054

2020-12-31

Rotor hub assembly with universal joint

20200324889

2020-10-15

Flight vehicle

#10

20200055593

2020-02-20

Rotorcraft flapping lock

#11

20200031467

2020-01-30

Multi-rotor unmanned aerial vehicle

#12

20190375497

2019-12-12

Bearingless gimbaled rotor hubs and swashplates

#13

20190193836

2019-06-27

High stiffness hub assemblies for rotor systems

#14

20190023386

2019-01-24

Rotor hub assembly with universal joint

#15

20190016456

2019-01-17

Inboard bearing assemblies having independent shoes

#16

20180290738

2018-10-11

Constant-velocity joint link with reduced axial stiffness

#17

20180290737

2018-10-11

Rotor hub elastomeric bearings

#18

20180162526

2018-06-14

Proprotor Systems for Tiltrotor Aircraft

#19

20180141654

2018-05-24

Proprotor systems for tiltrotor aircraft

#20

20180002005

2018-01-04

Aircraft

#21

20170259913

2017-09-14

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

#22

20170210465

2017-07-27

Bottom abutment device for a rotorcraft rotor, a rotorcraft rotor, and a rotorcraft

#23

20160332727

2016-11-17

Aircraft with thrust vectoring tail

#24

20160083087

2016-03-24

Rotorcraft flapping lock

#25

20160023752

2016-01-28

Torque transfer system for a rotorcraft

#26

20150197332

2015-07-16

Constant velocity drive for tilt rotor assembly

#27

20150136901

2015-05-21

Rotor hub elastomeric bearing

#28

20150053814

2015-02-26

Rotor system with torque-splitter assembly

#29

20140322010

2014-10-30

Constant-velocity joint link with reduced axial stiffness

#30

20140302938

2014-10-09

Constant velocity universal joint for helicopter rotor

#31

20140271180

2014-09-18

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

#32

20140252156

2014-09-11

High Altitude Aircraft, Aircraft Unit and Method for Operating an Aircraft Unit

#33

20140248150

2014-09-04

Constant velocity joint with spring rate control mechanism

#34

20140133979

2014-05-15

Constant velocity joint with control mechanism

#35

20130156580

2013-06-20

Constant-velocity drive system for gimbaled rotor hubs

#36

20110315816

2011-12-29

Constant-velocity joint with torque-combining differential

#37

20100266411

2010-10-21

Constant-velocity joint with torque-combining differential

#38

20090184209

2009-07-23

Constant-velocity drive system for gimbaled rotor hubs

#39

19333040

2026-04-28

Rotor with offset