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| Number | Title | Issue Date |
| 7771168 | Axial fan The invention relates to an axial fan comprising a boss and a number of blades evenly distributed and arranged to the boss, wherein the blades have an aerofoil profile, each blade is arranged to the boss with a strip, ... | 08/10/2010 |
| 7670114 | Industrial fan An engine fan has fan blades capable of switching between a sucking and blowing operation when the fan is not in operation. An internal mechanism allows for blade pitch adjustment of all fan blades by twisting one blade about its own axis. End positions of the blade... | 03/02/2010 |
| 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 |
| 7261517 | Device for adjusting a rotor blade of a wind energy turbine The device for adjusting a rotor blade of a wind energy turbine is provided with a driving device (12) for driving an adjusting element (24) for selectably rotating the rotor blade (26) in both directions about its longitudinal axis (28),... | 08/28/2007 |
| 7179054 | Flow reversal system for axial fan An axial fan has a blade support wheel coupled to a drive shaft. A disk is positioned about the drive shaft adjacent the wheel. A torsion spring is coupled to the wheel and to the disk. When the torsion spring is in tension, the disk is poised for a relative rotatio... | 02/20/2007 |
| 7156707 | Marine propulsion system A marine propulsion system comprising a push rod (50) for adjusting the pitch of propeller blades (34). The push rod (50) has a screw-threaded bolt (60) engaged with a nut (78). The nut (78) carries a bevel gear (84) ... | 01/02/2007 |
| 6872045 | Apparatus and method for fluid drive conversion A fluid drive conversion system having a plurality of flat foils rotatably connected to a vertical shaft such that the foils are generally vertical in position, pivot about a vertical axis, are a predefined distance, at least about one quarter of the width of a foil... | 03/29/2005 |
| 6692231 | Molded fan having repositionable blades The present invention provides a fan having a molded, substantially non-metallic hub and a plurality of fan blades attached thereto. The fan blades can be rotationally indexable relative to the hub, so that a pitch angle may be adjusted. Further, the fan ... | 02/17/2004 |
| 6666649 | Helicopter individual blade control system In an individual rotor blade control device for a helicopter main rotor with a rotor shaft that can be driven by a main drive, with an even number of rotor blades that are arranged on the periphery of a rotor hub, with primary control mechanisms for colle... | 12/23/2003 |
| 6461212 | Automatic start control and clutch of toy engine powered by high pressure gas A starting device of a toy engine comprises a spring, a starting piece, and a unidirectional bevel gear. The motion of the spring between the two fulcrums serves to ensure that the control rod is kept securely in place at a disengaging position and an eng... | 10/08/2002 |
| 6428274 | Drive mechanism for adjusting the rotor blades of wind power installations A device for adjustment of rotor blades which are pivotally mounted on a rotor hub of a wind power plant, with a drive for turning the rotor blades and a lockout which is connected to each rotor blade, the lockout being an activatable lockout which in the... | 08/06/2002 |
| 6364610 | Manually adjustable variable-pitch boat propeller A variable-pitch boat propeller has a hub rotatable about a hub axis, a plurality of vanes rotatable on the hub and extending generally radially of the hub axis, and an adjustment element rotatable on the hub about the hub axis and connected to the vanes ... | 04/02/2002 |
| 6312223 | Marine propeller A marine propeller includes a hub defining an axial direction of the propeller, a plurality of adjustable propeller blades disposed around the hub, and a blade setting adjusting arrangement. Each blade includes a blade-part and a root-part, the root-part ... | 11/06/2001 |
| 6170779 | Rotor pitch lock for rotary/wing aircraft The present invention comprises an apparatus for locking the pitch axes of the rotor blades of a rotor/wing aircraft so as to form a rigid wing. In one embodiment of the present invention the rotor blades of a rotor/wing aircraft are locked to each other ... | 01/09/2001 |
| 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 |
| 6065934 | Shape memory rotary actuator A rotary actuator (18) is provided, including an actuator assembly (20). The actuator assembly includes a torque tube (24) formed of a shape memory alloy, a super elastic NiTinol return spring (26) having a proximal end (46) and a distal end (44), and a t... | 05/23/2000 |
| 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 |
| 6056609 | Adjustable-pitch propeller, especially for sport boats The positions of blade members on a hub of a propeller for a sport boat is determined by replaceable keys or plates fitted into openings of corresponding shape and having differently located bores determining the pitch setting. The recess can be in the se... | 05/02/2000 |
| 5997253 | Adjustable pitch propeller An adjustable propeller is provided with a receptacle on its hub which is shaped to receive a base portion of a propeller blade. First and second pluralities of alignment devices are provided to allow an operator to select a desired pitch angle and attach... | 12/07/1999 |
| 5951252 | Helicopter flap lock assembly A flap lock device for restraining the flapping movement of a main rotor blade assembly on a helicopter. The flap lock device includes an first elongate frame member which extends between a first end and a second end and second elongate frame member which... | 09/14/1999 |
| 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 |
| 5595474 | Pitch variation control device for the blades of a turbomachine rotor and method of operating the device A device for controlling the pitch of the blades of a turbomachine rotor includes an electric motor having a stator which is stationary and a rotor, preferably of the permanent magnet or asynchronous kind, which is mounted on the turbomachine shaft and is... | 01/21/1997 |
| 5527154 | Variable pitch boat prop A variable pitch boat prop includes a hub fixed to the prop shaft, a sleeve surrounding the hub and having bearings which receive stub shafts from a plurality of blades. The stub shafts pivot in the bearings, so that the blade pitch can change. Pinion tee... | 06/18/1996 |
| 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 |
| 5498135 | Actuator for a variable pitch propeller An actuator for varying the pitch of a plurality of propeller blades mounted on a propeller blade hub comprising an electric motor driving a drive gear, a reduction gear set driven by the drive gear and driving an externally threaded drive spool, an inter... | 03/12/1996 |
| 5452988 | Blade pitch change mechanism A lightweight and compact apparatus is provided for altering and controlling the pitch of a plurality of rotating blades during rotation using a mechanical clutch and gear arrangement driven by a rotational speed differential between the blade drive shaft... | 09/26/1995 |
| 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 |
| 5232345 | Feathering propeller with a manually adjustable pitch Pitch adjustment in a feathering propeller employing a planet gear engagement between a pinion hub keyed on the drive shaft and planet pinions at the base of the blades of the propeller which are rotatably mounted through holes of the wall of a hub's casi... | 08/03/1993 |
| 5199850 | Pitch stop assembly for variable pitch propulsor A pitch change system (30) for varying the pitch of the blades (16) of a multi-bladed propulsor (10) comprises a pitch change actuation assembly (40) and a pitch change drive assembly (70) for selectively actuating the pitch change actuation assembly (70)... | 04/06/1993 |
| 5031858 | Apparatus and method for folding and locking rotor blades Folding and folding locking apparatus for rotor blades that includes a power actuator for rotating the blades and locking means for securing the blade in the deployed position and securing the blades against rotation of the pitch angle during and when the... | 07/16/1991 |
| 5022820 | Variable pitch propeller An automatic variable pitch propeller including a central hub defining an axis of propeller rotation and a plurality of blades connected to and extending from the central hub substantially normal to the axis of rotation, each blade being mounted for rotat... | 06/11/1991 |
| 5005357 | Oscillating force turbine A turbine system utilizes the ebb and flow of the natural movements of tidal wave action to generate power. Waves are allowed to enter and exit from a chamber while at the top of the chamber a narrow exit allows for air flow into an out of the chamber is ... | 04/09/1991 |
| 4948337 | Aircraft engine propulsor blade pitch sensing Pitch of a blade (12) on an aircraft engine propulsor (14) is determined by employing a shaft (22) and a bevel gear (23) to alter relative circumferential distance between a first set of teeth (25) and a second set of teeth (26). Said teeth (25,26) create... | 08/14/1990 |
| 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 |
| 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 |
| 4533296 | Pitch control system for variable pitch propeller A propeller pitch control system having a mechanical low pitch stop which includes an electrical backup therefor. The backup comprises an electrically operatable means (245) to effect blade pitch adjustment toward feather under conditions of failure of th... | 08/06/1985 |
| 4346305 | Governor for fluid current motor A fluid current motor having at least one vane mounted on a support for being moved by a fluid current. Flappers are pivotally mounted on the vane for orbital movement and are stopped from movement when moving with the fluid current and swing parallel to ... | 08/24/1982 |
| 4289970 | Wind powered electrical generator A wind powered electrical generator having a rotatable wind wheel (21) carrying one of the armature (42) or field structures and a plurality of windvanes (45) connecting the rim to a central shaft (28), a stator (39) carrying the other of the armature or ... | 09/15/1981 |
| 3994128 | Dual output variable pitch turbofan actuation system An improved actuating mechanism is provided for a gas turbine engine incorporating fan blades of the variable pitch variety, the actuator adapted to rotate the individual fan blades within apertures in an associated fan disc. The actuator includes means s... | 11/30/1976 |
