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| Number | Title | Issue Date |
| 7462015 | Rotocraft rotor with hinged blades and lockable retractable flapping abutments A rotorcraft rotor with hinged blades, includes: a hub; a plurality of blades hinged to flap relative to the hub; bottom abutments of the hub, and bottom abutments of the blades suitable for co-operating with the bottom abutments of the hub; and top abutments of the... | 12/09/2008 |
| 7357686 | Boat propeller with adjustable blades for adjusting the pitch thereof A boat propeller comprises a hub formed of a first cylindrical member and a second cylindrical member detachably joined together. The second cylindrical member comprises a plurality of insertion cavities formed in the second cylindrical member, an end of each of the... | 04/15/2008 |
| 7334994 | Automatic self-feathering and resetting sail restraint for migler's vertical axis wind turbine An improved sail restraint for Migler's vertical axis wind turbine in which excessive wind speed automatically causes the sails to be feathered, protecting them from wind damage, and, when the wind speed is reduced to an allowable level, the improved sail restraint ... | 02/26/2008 |
| 7331761 | Wind turbine pitch bearing and method A pitch bearing and related method for wind electric turbines has an annularly-shaped first bearing ring connected with an associated wind turbine blade, and includes a first raceway groove. An annularly-shaped second bearing ring is connected with the rotor portion... | 02/19/2008 |
| 7306430 | Ram air turbine blade rotation over-speed prevention mechanism A ram air turbine (RAT) prevents release of its turbine blades due an over-speed condition by detecting an over-speed condition with a turbine hub-mounted centrifugally operated trigger mechanism and rotating the blades to a fixed coarse pitch position with a releas... | 12/11/2007 |
| 7124662 | Reversible driving apparatus for PCU pumps An accessory driving apparatus for an aircraft system is connected to an accessory unit to be driven, such as a PCU pump. A gear set for transferring rotational power from the driving shaft to the driven shaft is provided for selective arrangement in first and secon... | 10/24/2006 |
| 7101237 | Propellor blade adjustment system for propulsion through fluid environments under changing conditions The stern end of a seawater hull has a rotor hub with propeller blades thereon. The rotor hub is rotated for propulsion of the hull by means of a propeller shaft extending through a sealed compartment within the hull. Such sealed compartment and an electrically powe... | 09/05/2006 |
| 7074010 | RAM air turbine over-speed protector using redundant yoke plate linear bearings An improved ram air turbine for generating emergency aeronautical supplemental power with a plurality of concentric or nested linear bearings for supporting a speed governor yoke plate on a speed governor shaft comprising a movable sleeve that supports the yoke plat... | 07/11/2006 |
| 6942458 | Variable pitch fan An improved variable pitch fan comprising a fan hub, with fan blades extending radially outward from the fan hub and mounted for rotation about respective radially extending axes corresponding to each fan blade. Each fan blade has a blade surface extending perpendic... | 09/13/2005 |
| 6811376 | Actuation system for a controllable pitch propeller A propeller control system provides for actuation through supply pressure only. A transfer bearing thereby requires only a single land. The supply pressure is metered at a pitch change valve within the rotating propeller shaft downstream of the transfer bearing to p... | 11/02/2004 |
| 6749393 | Wind power plant A wind power plant for producing electrical energy on a large scale, comprising a base, a housing, rotatable on said base around vertical axis. A wind tail, attached to the housing, rotate the housing toward direction of the wind, utilizing the power of the wind, an... | 06/15/2004 |
| 6082968 | Centrifugally activated variable damper assembly A centrifugally activated variable damper assembly for a stopped-rotor aircraft is disclosed for adjusting dampening level of teetering motions produced by the rotors during the in-flight conversion process from rotary-wing to fixed-wing flight, or vise v... | 07/04/2000 |
| 6077040 | Control system for blades for a variable pitch propeller A system for controlling propeller blade pitch is disclosed. The system comprises a transfer tube, wherein the transfer tube defines an element of the rotatable portion and wherein the transfer tube is non-translating relative the rotatable and non-rotata... | 06/20/2000 |
| 6059528 | Electronic propeller control system An improved electronic hydraulic propeller control designed as a retro-fit kit for existing Hamilton Standard Division 54460 and 54H60 propeller controllers includes an apparatus for controlling the pitch angle of a propeller blade. The retro-fit kit incl... | 05/09/2000 |
| 5897293 | Counterweighted propeller control system A system for controlling functions of a propeller having a plurality of blades is disclosed. The system comprises an electronic control for controlling the functions of the propeller. A plurality of backup devices are provided for backing up the electroni... | 04/27/1999 |
| 5820341 | Device with retractable double anti-cone stops ring, and rotor head including it The device includes anti-cone stops projecting outward from at least two coaxial rings that can rotate about the rotor axis on the top face of the hub. Flyweights are each mechanically joined to one of the rings by a mechanism for driving the latter in ro... | 10/13/1998 |
| 5810561 | Variable pitch propeller apparatus A variable pitch propeller apparatus for use with a motor is disclosed. The apparatus includes a housing having a plurality of blades mounted therein for rotation. Adjustable high pitch and low pitch stop rings are connected to the housing and a synchroni... | 09/22/1998 |
| 5588801 | Flap stops device with retractable upper stops ring, and rotor head including it The device comprises anti-cone stops projecting outwards from a common ring that can rotate about the rotor axis on the top face of the hub and flyweights are each individually joined to the ring for driving the latter in rotation from the "ground" positi... | 12/31/1996 |
| 5527153 | Variable pitch propeller A variable pitch propeller assembly is disclosed for a power boat. Three blades are mounted on a housing carried by the propeller shaft. Each blade has an axle received in the housing. Each axle has a slot receiving a dowel carried in the housing so the b... | 06/18/1996 |
| 5326223 | Automatic variable pitch marine propeller with mechanical holding means There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a second higher pitch. The blades are preferably mechanically ... | 07/05/1994 |
| 5242265 | Aircraft pitch change mechanism A system for changing pitch in aircraft propfans is disclosed, in which a motor, located at a stationary position, changes pitch of the blades by of a gear train. Three features of the system are that a feather brake can override the motor and drive the b... | 09/07/1993 |
| 5240374 | Damped automatic variable pitch marine propeller There is provided a self-actuating variable pitch marine propeller which incorporates two or more blades, each independently rotatable, relative to the propeller hub, between a first lower and a second higher pitch. The blades are preferably mechanically ... | 08/31/1993 |
| 5161948 | Propulsor pitchlock and feather stop A pitch change actuation system for changing the pitch of the blades (16) of a prop-fan propulsor (10) comprises a translating pitch change actuator (30) and a flexible feather latch member (50) including a feather stop (56) and a feather latch (58), the ... | 11/10/1992 |
| 5129785 | Automatic variable discrete pitch marine propeller A self-actuating variable pitch marine propeller which incorporates two or more blades having cylindrical shafts which are rotatably connected to a central hub via cylindrical joints; the blades rotate about and translate radially, relative to the hub cen... | 07/14/1992 |
| 5061153 | Aircraft propeller assembly with blade pitch reset for ground idle An aircraft propeller has adjustable pitch blades which are reset from a low pitch in-flight idle position to a lower pitch ground idle position by a beta feedback and reset mechanism. The reset mechanism includes a set of cam elements supported for movem... | 10/29/1991 |
| 5032057 | Automatic variable pitch marine propeller There is provided a self-actuating, variable pitch propeller having a plurality of blades. All of the blades are automatically movable between a first, relatively lower pitch position and a second, relatively higher pitch position, substantially simultane... | 07/16/1991 |
| 5023793 | Apparatus and method for dynamic compensation of a propeller pitch speed control governor Governor stability of a propeller pitch controlled speed governor is improved by dynamically compensating a turbine engine speed error signal employed in determining fuel flow. The fuel flow requirement is a function of the dynamically compensated turbine... | 06/11/1991 |
| 4936746 | Counter-rotation pitch change system A propeller system has a pair of hub assemblies driven in counter-rotation, each hub assembly having a mechanical pitch change actuator, each actuator being provided with a pitch lock that rotates simultaneously with the motion of the actuator to allow th... | 06/26/1990 |
| 4934901 | Pitch change actuation system A self-locking pitch change actuator is configured to fit within an annular hub (34). A ring gear (40) is driven circumferentially by a tangentially oriented ballscrew (42) and traveler (44). The ballscrew (42) is driven by a hydraulic motor (50) controll... | 06/19/1990 |
| 4929153 | Self-actuating variable pitch marine propeller There is provided a self-actuating, variable pitch propeller having a plurality of blades. All of the blades are automatically movable between a first, relatively lower pitch position and a second, relatively higher pitch position, substantially simultane... | 05/29/1990 |
| 4909709 | Throttle/propeller mixer cam A cam mechanism enabling the pilot to automatically advance the propeller low pitch stop with the engine power lever on airplanes with multibladed propeller systems having a beta control mechanism for adjusting the blade angle. The cam provides an inexpen... | 03/20/1990 |
| 4904157 | Aircraft propeller assembly with blade pitch reset for ground idle An aircraft propeller has adjustable pitch blades which are reset from a low pitch in-flight idle position to a lower pitch ground idle position by a beta feedback and reset mechanism. The reset mechanism includes a set of cam elements supported for movem... | 02/27/1990 |
| 4890979 | No-back apparatus for propeller pitch control An improved no-back mechanism for propeller pitch control comprises a brake which resists motion of a first member and a uni-directional coupling between the first member and a drive connecting a pitch control prime mover to an adjustable pitch propeller.... | 01/02/1990 |
| 4872811 | Inboard servo for marine controllable pitch propellers An inboard servo for a controllable pitch propeller of the force rod type comprises a feedback device having at least two feedback rods connected to the piston and extending through the cylinder end wall and an output ring connected to the rods. An emerge... | 10/10/1989 |
| 4863347 | Bladed rotor assemblies A bladed rotor assembly comprising: a bladed rotor; an actuator for effecting a change of blade pitch; a first valve member connected to, and movable with, the actuator and having first and second passageways; and a second valve member co-operable with the first va... | 09/05/1989 |
| 4753572 | Propeller pitch change actuation system A mechanical pitch lock includes a pitch lock screw (60) that simultaneously rotates within an actuator (42) while the actuator moves to change the pitch of a propeller blade (16). While rotating simultaneously with the motion of the pitch actuator, the p... | 06/28/1988 |
| 4750862 | Modular propeller blade pitch actuation system A modular, easily replaceable, pitch actuation system is removably secured within the hub of an aircraft. The modular system houses a driving system which provides a rotational output to set the pitch of propeller blades mounted to the hub, and a pitch ch... | 06/14/1988 |
| 4711615 | Turboprop overspeed protection system An overspeed protection system is provided for a turboprop engine. The engine includes a governor pump and a constant speed governor both of which are driven by the turbine through a gear reduction assembly. The constant speed governor is in communication... | 12/08/1987 |
| 4671736 | Apparatus for the control of an aerial propeller Apparatus for controlling the pitch of the blades of a variable pitch, governor controlled, aerial propeller of which the pitch of the blades is variable between a coarse pitch limit and a fine pitch limit to match the torque of its prime mover has holdin... | 06/09/1987 |
| 4653982 | Windmill with controller for controlling rotor RPM A windmill construction embodying an improved arrangement for driving a load through a centrifugal clutch and for adjusting the pitch angle of the blades. The adjusting mechanism is responsive to speed so as to increase the pitch angle as the speed increa... | 03/31/1987 |
