Patents
Sitemap › B64 - Aircraft; Aviation; Cosmonautics › B64C - Aeroplanes; Helicopters › B64C 27 - Rotorcraft; Rotors peculiar thereto
Patents for B64C 27 - Rotorcraft; Rotors peculiar thereto (10,112)
08/1981
08/04/1981US4281967 Resonator device for damping the vibrations of a rotor of a rotary-wing aircraft
08/04/1981US4281966 Multi-blade propellers
07/1981
07/22/1981EP0032354A1 Hingeless helicopter rotor with elastic gimbal hub
07/21/1981US4279391 Desensitizing helicopter control response to inadvertent pilot inputs
07/07/1981US4277789 Microwave energy transmission system for around-the-mast applications
06/1981
06/30/1981US4275994 Roll formed blade structure
06/30/1981US4275992 Mode controlled attachment of rotor mounted components
06/30/1981CA1104167A2 Vibration isolation system
06/23/1981US4274808 Swashplate drive redundancy system
06/23/1981US4274510 Multi-directional suspension means for rotor aircraft
06/16/1981US4273511 Main rotor for a helicopter
06/16/1981US4273302 Aircraft with counterrotating members
06/11/1981WO1981001542A1 Gyro stabilized flying saucer model
06/10/1981EP0029838A1 Turbo-generator for a rotary wing helicopter.
06/09/1981US4272041 Model helicopter device
06/09/1981US4271928 Lubricant supply device
06/09/1981CA1102774A1 Laminated composite rotor yoke
06/09/1981CA1102773A1 Blade-mounted centrifugal pendulum
06/09/1981CA1102772A1 Soft inplane helicopter rotor
05/1981
05/26/1981CA1101817A1 Roll formed blade structure
05/19/1981US4268222 Equipment for folding the blades of a main helicopter rotor
05/12/1981US4266912 Rotor blade support setup for rotary wing aircraft
04/1981
04/28/1981US4264277 Redundant rotor blade retention system
04/07/1981US4260332 Composite spar structure having integral fitting for rotational hub mounting
04/07/1981CA1098997A1 Control system for plural engines
03/1981
03/24/1981US4257739 Soft inplane helicopter rotor
03/24/1981US4257738 Rotor mounting assembly for rotary wing aircraft
03/17/1981US4256354 Laminated bearing structures
03/10/1981US4255087 Member formed of fiber-reinforced plastic material, such as a rotor blade
03/10/1981US4255084 Device for damping the vibrations of a rotary-wing aircraft rotor
02/1981
02/25/1981EP0024229A2 Blade profile for rotary-wing aircraft
02/24/1981US4252504 Helicopter blade folding system
02/24/1981US4252503 Rotor blade especially for rotary wing aircraft
02/18/1981EP0023954A2 Damping device for an aircraft rotor blade
02/17/1981US4251309 Method of making rotor blade root end attachment
02/17/1981US4251188 Four-blade rotor, especially for helicopters
02/17/1981US4251187 Blade retention bearing for helicopter rotor
02/10/1981US4249862 Damper means for helicopter rotors
02/04/1981EP0023393A1 Freewheel devices
02/03/1981US4248572 Helicopter blade
01/1981
01/28/1981EP0022918A2 Fastening device for superposed connecting means of rotor blades, especially for a helicopter
01/27/1981US4247255 Composite rotor blade root end
01/27/1981US4247061 Helicopter with stabilator detuned in antisymmetric vibration modes from main rotor wake excitation frequency
01/27/1981CA1094667A1 Speed-variable limits in fail-safe actuators
01/20/1981US4245956 Compensating linkage for main rotor control
01/20/1981US4245802 Steering and stabilization apparatus for rotary wing aircraft
01/20/1981US4245801 Tail rotor control cable-pylon fold accommodation
01/13/1981US4244677 Cross-beam helicopter rotor with readily replaceable snubber
01/07/1981EP0021901A1 Compact articulated rotor hub for a rotor craft
01/06/1981US4243359 Rotor structure, especially for hingeless rotary wing aircraft
01/06/1981US4243358 Control system for redundant swashplate drive
12/1980
12/30/1980US4242048 Semi-articulated flexstrap
12/30/1980US4242047 Adjustable bearing centering means for helicopter rotor elastomeric bearings
12/30/1980US4242044 Compensating structure for circulation control rotor pneumatic valve
12/30/1980CA1092581A1 Helicopter blade
12/16/1980US4239456 Rotor blade out-of-plane centrifugal pendulums
12/16/1980US4239455 Blade-mounted centrifugal pendulum
12/10/1980EP0019691A1 Composite rotor blade
12/09/1980CA1091213A1 Variable incidence helicopter stabilator and fail safe actuator
12/02/1980US4236607 Vibration suppression system
12/02/1980US4236426 Method and arrangement for the traversing of the critical rotational speeds of elongate rotors
11/1980
11/27/1980WO1980002542A1 Turbo-generator for a rotary wing helicopter
11/26/1980EP0019047A1 Hingeless multiblade rotor for helicopters
11/26/1980EP0019041A1 Non-hinged rotor
11/25/1980US4235570 Elastomeric helicopter rotor load reaction system
11/13/1980WO1980002408A1 Blade fold restraint system
11/13/1980WO1980002407A1 Adjustable bearing centering means for helicopter rotor elastomeric bearings
11/11/1980US4232844 Aerofoil with composite tip section having skewed fibres
11/11/1980US4232563 Laminated elastomeric end bearings for articulating links
11/04/1980US4231705 Helicopter rotor
10/1980
10/29/1980EP0018114A1 Thrust devices
10/28/1980US4230291 Tuned spring-mass vibration absorber
10/21/1980CA1087874A1 Method and device for passing through critical speeds of elongate rotors
10/21/1980CA1087862A1 Flexible spherical joint
10/14/1980US4227859 Rotor for a gyroplane
10/14/1980US4227858 Flexible spherical joint
10/14/1980US4227857 Composite flexural yoke for helicopters
10/14/1980US4227856 Reverse velocity rotor system for rotorcraft
09/1980
09/30/1980US4225287 Vibration absorber for helicopter
09/23/1980US4223763 Kinetic energy absorber
09/16/1980US4222709 Variable-pitch rotor, specially for a rotary-wing aircraft
09/09/1980CA1085368A1 Helicopter pitch rate feedback bias for pitch axis maneuvering stability and load feel
09/03/1980EP0014748A2 Non-articulated connection of rotor blades of a rotary wing air craft
08/1980
08/21/1980WO1980001675A1 Tail rotor control cable-pylon fold accommodation
08/19/1980US4218187 Constant frequency bifilar vibration absorber
08/12/1980US4216925 Helicopter of the type having two coaxial counterrotating rotors with a drive mechanism interposed between the power plant and the rotors
08/12/1980US4216924 Helicopter
08/12/1980CA1083368A1 High speed shaft flexible coupling with maximum shaft misalignment accommodation capability
08/07/1980WO1980001557A1 Desensitizing helicopter control response to in advertent pilot input
08/05/1980US4215833 Cable-cutting device
08/05/1980US4215587 Folding mechanism
07/1980
07/29/1980US4214722 Pollution reducing aircraft propulsion
07/22/1980US4213739 Helicopter rotor blade
07/22/1980US4213584 Helicopter hover stability and cruise gust effect alleviation
07/22/1980US4213518 Fixed position pendular-type vibration absorber with linearization at fixed or variable frequencies
07/22/1980CA1082235A1 Improved vibration isolation system
07/15/1980US4212588 Simplified rotor head fairing
07/15/1980CA1081830A1 Automatic approach to hover system
07/15/1980CA1081828A1 Stability augmentation systems
07/09/1980EP0013272A1 Improved helicopter
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