Patents
Sitemap › B64 - Aircraft; Aviation; Cosmonautics › B64C - Aeroplanes; Helicopters › B64C 11 - Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft
Patents for B64C 11 - Propellers, e.g. of ducted type; Features common to propellers and rotors for rotorcraft (3,644)
10/1990
10/31/1990CN1010205B Aircraft propeller noise reduction
10/30/1990US4966527 Composite blade construction for a propeller or rotor blade
10/24/1990EP0394183A1 Pitch change actuation system
10/24/1990EP0394181A2 Use of discrete (on-off) feather signal to govern propeller overspeed
10/24/1990EP0393283A1 A ducted fan gas turbine engine with a spinner.
10/24/1990CN1046400A Propeller speed governor having a derivative inhibit at high flight speeds
10/24/1990CN1046398A Ground mode control of aircraft propeller speed and pitch
10/23/1990US4964844 Gearbox arrangement for driving coaxial contra rotating multi-bladed rotors
10/23/1990US4964315 Transmission having dual counterrotating output shafts
10/17/1990EP0392968A2 Ground mode control of aircraft propeller speed and pitch
10/17/1990EP0392967A1 Fuel control having reset of propeller overspeed and underspeed governors
10/17/1990EP0392966A1 Propeller speed governor having a derivative inhibit at high flight speeds
10/17/1990EP0392965A1 Apparatus and method for dynamic compensation of a propeller pitch speed control governor
10/11/1990CA2014181A1 Ground mode control of aircraft propeller speed and pitch
10/11/1990CA2013948A1 Propeller speed governor having a derivative inhibit at high flight speeds
10/11/1990CA2013947A1 Use of discrete (on-off) feather signal to govern propeller overspeed
10/11/1990CA2013946A1 Method for synchrophaser measurement and synchrophaser control
10/11/1990CA2013942A1 Fuel control having reset of propeller overspeed and underspeed governors
10/11/1990CA2010153A1 Rotating cowling
10/10/1990CA2013708A1 Apparatus and method for dynamic compensation of a propeller pitch speed control governor
10/04/1990DE3913262A1 Circular air-screw with increased efficiency - has regularly shaped segments with flat surfaces made from flat disc
09/1990
09/25/1990CA1274403A1 Transmission having dual counter-rotating output shafts
09/18/1990US4958289 Aircraft propeller speed control
09/18/1990US4957415 Polyester composite propeller spinner and method of making same
09/12/1990EP0387183A2 Variable propeller system incorporating a forward transfer bearing
09/07/1990CA2008792A1 Variable propeller system incorporating a forward transfer bearing
09/05/1990EP0385913A1 Airfoiled blade
08/1990
08/29/1990EP0384871A1 Manual pitch control system for an aircraft propeller
08/28/1990CA1273210A1 Aircraft thrust control
08/23/1990CA2010699A1 Variable pitch propeller
08/14/1990US4948339 Propeller blade counterweight
08/14/1990US4948337 Aircraft engine propulsor blade pitch sensing
08/07/1990US4947356 Aircraft cabin noise control apparatus
08/01/1990EP0380278A2 Propeller blade mechanism
07/1990
07/31/1990US4944655 Propeller blade of a fiber-reinforced plastic material
07/19/1990DE3842026A1 Tower of a highly stable, to the greatest extent vibration-free design, inter alia for wind-driven power plants, of a laminar or sandwich construction using glass-fibre-reinforced plastic or carbon-fibre-reinforced plastic, for extremely heavy loadings at great heights
07/17/1990US4941803 Airfoiled blade
07/05/1990DE3942918A1 Flugzeug-antriebssystem mit einem luftschrauben-tragring und verfahren zum verstaerken eines solchen tragrings Aircraft propulsion system with an air screw-support ring and method for enhancing such a contract rings
07/04/1990CN1043479A Propeller blade retention system
06/1990
06/28/1990DE3842962A1 Gas-turbine engine (power unit)
06/28/1990DE3841174A1 Propeller fan
06/26/1990US4936746 Counter-rotation pitch change system
06/26/1990US4936526 Foldable counter-rotating propfan blades
06/26/1990CA1270802A1 Prop-fan with improved stability
06/21/1990DE3926247A1 Propellerblatthaltesystem Propeller blade retention system
06/19/1990US4934901 Pitch change actuation system
06/19/1990US4934825 Propeller phase control apparatus
06/19/1990US4934483 Method of reducing the overflying noise of airplanes having a propeller driven by a piston engine
06/12/1990US4932908 Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system
06/07/1990DE3922605A1 Automatic pitch adjusting propeller - has pendant mounting and damping supports
06/06/1990CN1042692A Counterrotating aircraft propeller blades
06/05/1990US4930725 Pusher propeller installation for turboprop engines
05/1990
05/31/1990DE3905282C1 Propeller fan
05/31/1990DE3839467A1 Detachable propellor blade fastening
05/23/1990EP0138800B1 Air propeller
05/22/1990US4928241 Aircraft propeller control
05/22/1990US4927331 Blade for high-performance shrouded propeller, multi-blade shrouded propeller provided with such blades and tail rotor arrangement with shrouded propeller for rotary wing aircraft
05/22/1990US4927330 Air propeller
05/22/1990US4927329 Aircraft engine unducted fan blade pitch control system
05/17/1990DE3922455A1 Verfahren zum herstellen eines propellerblattes aus einem verbundmaterial A process for the manufacture of a propeller blade made of a composite material
05/16/1990EP0368182A2 Propfan-turboprop unit with rotor blade control device
05/15/1990US4925131 Aircraft with a plurality of propellers, a pipe structure for thereon holdable wings, for vertical take off and landing
05/10/1990DE3835213A1 Wing construction for energy transmission in the media of water and gas, and for a vehicle for movement on land or water and in the air
05/03/1990DE3910688C1 Propeller fan
05/01/1990US4921403 Propeller blade assembly
04/1990
04/26/1990DE3839967A1 Torque force converter
04/18/1990EP0363997A2 Counter-rotation pitch change system
04/12/1990DE3834511A1 Propeller fan
04/12/1990DE3833290A1 Nose cap of fibre-reinforced plastic
04/11/1990EP0362886A2 Pinned airfoil propeller assembly
04/10/1990US4915586 Propfan blade attachment
04/04/1990EP0360895A1 Controllable pitch propeller, in particular for boat propulsion
04/04/1990CN1040962A Fan blade mount
04/03/1990US4913670 Blade-like profiled device for acting on a gaseous or liquid fluid flow
04/03/1990US4913623 Propeller/fan-pitch feathering apparatus
03/1990
03/27/1990US4911612 Sections for shrouded propeller blade
03/20/1990US4909709 Throttle/propeller mixer cam
03/08/1990WO1989008580A3 Energy efficient asymmetric pre-swirl vane and twisted propeller propulsion system
03/01/1990DE3828559A1 Tangential propeller
02/1990
02/27/1990US4904157 Aircraft propeller assembly with blade pitch reset for ground idle
02/13/1990US4900226 Control system for synchrophasing aircraft propellers
02/13/1990US4899957 Air borne craft, for example helicopter, and related devices
02/08/1990WO1990001002A1 Helicopter rotor blades
02/07/1990EP0353672A2 Composite propeller blades
01/1990
01/31/1990EP0353076A2 Assembly for determining the longitudinal displacement of a rotating shaft
01/18/1990DE3823215A1 Vortex suction container for producing lift for an aircraft or water craft
01/16/1990US4893989 Variable propeller system incorporating a forward transfer bearing
01/10/1990CN1038686A Rotary machine with non positive displacement usable as pump, compressor, impeller, generater or turbine
01/09/1990US4892462 Blade of composite materials and its manufacturing process
01/09/1990US4892269 Spinner ducted exhaust for pusher turboprop engines
01/09/1990CA1264313A1 Variable-pitch multi-blade propeller having individually dismountable composite material blades
01/02/1990US4890979 No-back apparatus for propeller pitch control
12/1989
12/28/1989DE3821034A1 Torque compensation in a single-bladed propeller
12/12/1989US4886224 Aircraft lift mechanism
12/12/1989US4886222 Atmospheric autorotating imaging device
12/06/1989EP0344671A2 Attachment device for a variable pitch prop fan blade
12/05/1989US4884948 Deflectable blade assembly for a prop-jet engine and associated method
11/1989
11/30/1989DE3906814A1 Propeller/fan-steigungsverstelleinrichtung Propeller / fan-steigungsverstelleinrichtung
11/28/1989US4883240 Aircraft propeller noise reduction
11/16/1989WO1989010869A1 Lift-jet engine for independent operation or for use in an aircraft
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