Patents-Review.com
ClassID:

72122 ⎘

B64C27/39 - CPC Classification

Classification description:

Rotorcraft; Rotors peculiar thereto; Rotors having articulated joints with individually articulated blades, i.e. with flapping or drag hinges

Recent Application in this class:
#1
20260109457
2026-04-23

FOUR-BAR FLAPPING ROTORS FOR AIRCRAFT AND ASSOCIATED METHODS

 #2
20250269952
2025-08-28

FOUR-BAR FLAPPING ROTORS FOR AIRCRAFT AND ASSOCIATED METHODS

 #3
20240353863
2024-10-24

FLIGHT-ENABLED SIGNAL BEACON

 #4
20240124136
2024-04-18

ROTOR HUB SYSTEM WITH ROTATING PITCH CONTROL ACTUATOR

 #5
20230213059
2023-07-06

Journal bearings

 #6
20230194312
2023-06-22

Anisotropic magneto-resistive sensor flap-measuring systems

 #7
20230108395
2023-04-06

FAST RESPONSE ROTOR SYSTEM

 #8
20230091534
2023-03-23

LINK ROTOR HEAD AND UNMANNED AERIAL VEHICLE

 #9
20220177126
2022-06-09

Unmanned aerial vehicle

 #10
20220144429
2022-05-12

Flight-enabled signal beacon

 #11
20220144418
2022-05-12

Rotor assemblies for rotorcraft

 #12
20220024569
2022-01-27

Fold-out propeller tip extensions

 #13
20210380221
2021-12-09

CONTINUOUS VARIABLE PITCH ROTOR SYSTEM

 #14
20210354813
2021-11-18

Pulse-induced cyclic control lift propeller

 #15
20210122460
2021-04-29

Rotorcraft having propeller generated power during autorotations

 #16
20200140073
2020-05-07

PASSIVE VARIABLE PITCH PROPELLERS

 #17
20200023952
2020-01-23

Propelling system with variable aerodynamic controls

 #18
20190344884
2019-11-14

Rotor hub

 #19
20190263514
2019-08-29

Passive pitch angle adjustment apparatus

 #20
20190210718
2019-07-11

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

 #21
20190168868
2019-06-06

Rotor assembly for a rotorcraft with torque controlled collective pitch

 #22
20190100300
2019-04-04

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

 #23
20190077503
2019-03-14

Unmanned aerial vehicle

 #24
20190071171
2019-03-07

Propeller units

 #25
20190061926
2019-02-28

Low moment rotor hub

 #26
20190031328
2019-01-31

Rotorcraft centrifugal force bearing

 #27
20190017543
2019-01-17

Inboard bearing assemblies with anti-rotation features

 #28
20180327089
2018-11-15

Tail rotor integrated damper attachment

 #29
20180257767
2018-09-13

Variable sweep rotorcraft blade tip

 #30
20180162520
2018-06-14

Soft-in-plane proprotor systems

 #31
20170320565
2017-11-09

Hinge mechanism for a weight-shifting coaxial helicopter

 #32
20170203838
2017-07-20

Rotorcraft and associated rotor blade position monitoring system and method

 #33
20160282140
2016-09-29

Flap angle measurement system and method

 #34
20160207621
2016-07-21

Aircraft rotor assembly with composite laminate

 #35
20160200433
2016-07-14

Rotorcraft rotor comprising a hub made of composite materials obtained from carbon fiber fabric dusted in a thermoplastic resin

 #36
20160167779
2016-06-16

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

 #37
20160059958
2016-03-03

Controlling Rotary Wing Aircraft

 #38
20160017954
2016-01-21

Rotary dampers, systems, and related methods

 #39
20160009373
2016-01-14

Variable Blade Pitch Propeller Assembly

 #40
20160001877
2016-01-07

Passive rotor control mechanism for micro air vehicles

 #41
20150284077
2015-10-08

Modular rotor craft rotor hub system

 #42
20150251757
2015-09-10

Vertical short takeoff and landing apparatus

 #43
20150176658
2015-06-25

Rotor hub damper for a rotorcraft

 #44
20150158583
2015-06-11

Stiff-in-plane rotor configuration

 #45
20140271222
2014-09-18

Composite rotor system using two race track style cantilevered yokes

 #46
20130287576
2013-10-31

Aircraft rotor with discrete flap hinge

 #47
20130078100
2013-03-28

Low offset hingeless rotor with pitch change bearings

 #48
20120230823
2012-09-13

Dual spring rate damper

 #49
20110274548
2011-11-10

Stiff-in-plane rotor configuration

 #50
20110243734
2011-10-06

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

 #51
20100075552
2010-03-25

MARINE PROPULSION AND CONSTRUCTIONAL DETAILS THEREOF

 #52
20100048069
2010-02-25

MARINE PROPULSION AND CONSTRUCTIONAL DETAILS THEREOF

 #53
20090060742
2009-03-05

Rotor head for a twin-rotor helicopter

 #54
20080247876
2008-10-09

Soft in-plane tiltrotor hub

 #55
20070137956
2007-06-21

Dual spring rate damper

 #56
20060285976
2006-12-21

Protection system, a bellows hinge, and an aircraft

 #57
16213636
2019-11-19

Propeller with passive variable pitch and rotatable base

 #58
16158146
2021-11-02

Anti-sound production using adjustable propeller blades

 #59
14975308
2019-08-06

Adjustable propeller blade with sound flaps

 #60
14975302
2019-05-14

Adjustable propeller blades for sound control

 #61
14706162
2018-11-27

Propeller units