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| Number | Title | Issue Date |
| 8147198 | Helicopter rotor yoke and method of making same A rotor yoke includes a blade attachment portion, a mast attachment portion, and an intermediate portion extending between the blade attachment portion and the mast attachment portion. The intermediate portion, the blade attachment portion, and the mast attachment p... | 04/03/2012 |
| 7393180 | Wind turbine in parked position The invention relates to a method for operating a wind power plant with a rotor and with at least two rotor blades rotatable about a common rotor axis in a rotor blade plane, whereof each can be swivelled about a swivel axis which is roughly parallel to its longitud... | 07/01/2008 |
| 7354248 | Elastomeric bearing elements for droop stop mechanisms An elastomeric bearing element having an outer race, an inner race, and at least two elastomeric segments secured between the inner and outer races is provided. The elastomeric segments are spaced from one another by a corresponding number of expansion segments. The... | 04/08/2008 |
| 7275913 | Rotor and gyrocopter with said rotor A rotor, comprising at least one rotor blade connectable to a rotor head, which rotor blade possesses a blade neck having a virtual flapping hinge in the form of a flexurally soft, flexurally elastic blade-neck portion, there being provided, in a blade-connector reg... | 10/02/2007 |
| 7207778 | Rotor as well as rotary-wing aircraft with a rotor A rotor, especially for a rotary-wing aircraft, with a rotor mast and one or more adjustable rotor blades includes a rotor blade adjustment device without a swash plate and arranged on a carrier device that automatically rotates synchronously with the rotor blades, ... | 04/24/2007 |
| 7100866 | Control system for a flying vehicle In one embodiment of the present invention there is described a vehicle having a propeller mechanism for propelling the vehicle in a horizontal direction. The vehicle includes a transmitter positioned on the bottom of the vehicle for transmitting a signal from the v... | 09/05/2006 |
| 7040863 | Variable pitch rotor blade for shrouded rotors, in particular helicopter rotors The blade includes a current part (1) having an aerodynamic profile enclosing a spar (7) and extending from blade tip (4) to a blade root (3) provided with a pitch sleeve (21), through which twisting arm (6) passes and protr... | 05/09/2006 |
| 7037072 | Rotor head for a rotary-wing aircraft A preferred embodiment of a rotor head for a rotary-wing aircraft having a plurality of rotor blades and a drive shaft includes a gimbal mechanically coupled to the drive shaft so that the gimbal rotates with the drive shaft, and a hub pivotally coupled to the gimba... | 05/02/2006 |
| 6986642 | Extreme mu rotor A rotor for a rotary wing aircraft includes a blade having a leading edge, and a trailing edge. The rotor has a leading edge tip extension at a tip of the blade and a weight within the leading edge tip extension. The rotor also includes a trailing edge tip extension... | 01/17/2006 |
| 6971853 | Elastomeric bearing system An elastomeric bearing system capable of sustaining a high compressive load is adapted to connect the blades of a helicopter rotor to a rotor hub. The bearing system comprises first and second elastomeric bearing elements fixed at the opposite ends of a tie bar. Sai... | 12/06/2005 |
| 6921249 | Main rotor shear restraint A main rotor shear restraint that includes two spherical ball segments, two corresponding bearing outer races, and a spring system for loading the bearing outer races against the two spherical ball segments. ... | 07/26/2005 |
| 6910865 | Helicopter rotor hub, and rotor featuring such a hub There is described a hub for a helicopter rotor, having a main body, and a number of connecting members projecting from the main body and for the connection of respective blades; the main body and the connecting members being defined by separate components connectab... | 06/28/2005 |
| 6848886 | Snubber A snubber inner member has a doubly convex outer surface portion having a central longitudinal axis. A shim/spacer stack secured to the outer surface portion couples the snubber inner member to the second member. A retainer having one or more engagement surfaces coo... | 02/01/2005 |
| 6783327 | Helicopter blade folding with blade droop Blade fold hinge units are attachable between each helicopter blade and its hub attachment point, while maintaining continuity of mechanical connection of each blade to its hub portion. A two portion hinge unit has a first portion for blade attachment and a second p... | 08/31/2004 |
| 6375426 | Protective edge members for composite flexures An edge member for use on a composite flexure having an exposed edge surface. The edge member includes an innermost composite ply attached to the edge surface, an outermost composite ply attached to the innermost composite ply, and at least one interior c... | 04/23/2002 |
| 6296444 | Prop rotor hub A prop rotor hub includes a constant velocity joint in the same plane as a prop blade yoke. Torque is transmitted from a shaft to the blades through the CV joint, hub plates attached to the CV joint, and the yoke, which is attached to the hub plates. Prov... | 10/02/2001 |
| 6280141 | Swash-plates system for control of the pitch of rotor blades with rotating plate driver The rotating plate of the system is fixed in rotation with the rotor by a driver with two rigid driving tracks extending axially and diametrically opposite in being fixed in rotation with the rotor. Each track engages with one of two driving fingers fixed... | 08/28/2001 |
| 6260676 | Magnetic particle damper apparatus A magnetic particle damper apparatus is provided for damping motion between two relatively movable members. The damper apparatus comprises first and second conductor members each attachable to one of the relatively movable members. The conductor members a... | 07/17/2001 |
| 6152696 | Swash-plate device for controlling the pitch of rotor blades with non-rotating plate articulated on a central ball joint The swash-plates are oscillating mounted by the non-rotating plate on a central ball joint sliding axially around a guide fixed to the structure and on which the ball joint is locked from rotation by internal splines engaging with external splines of the ... | 11/28/2000 |
| 6149386 | Swash-plate device for controlling the pitch of rotor blades with non-rotating plate articulated by cotters on a central ball joint The swash-plates are oscillating mounted by the non-rotating plate on a central ball joint sliding axially around a guide fixed to the structure and on which the ball joint is locked from rotation by internal splines engaging external splines of the guide... | 11/21/2000 |
| 6102659 | Swash-plate device for controlling the pitch of rotor blades with cylindrical runners sliding on non-rotating pillars The rotating and non-rotating swash-plates are guided in axial translation and in tilting on the rotor axis by two non-rotating pillars and slides provided with runners with a cylindrical external face permanently tangentially engaged and sliding against ... | 08/15/2000 |
| 6074168 | Swash-plate device for controlling the pitch of the blades of a rotor with rotary guided parts on slides translated along the rotor axis The rotating and non-rotating swash-plates are guided in axial translation and in tilting on the rotor axis by a non-rotating axial guide arrangement, such as two pillars, and slides on each of which slides one of two pads carrying diametrically opposite ... | 06/13/2000 |
| 6050778 | Semi-articulated rotor system A semi-articulated stiff-in-plane (SASTIP) rotor hub is provided. The hub includes a cylindrical composite shell (12). A plurality of flexure mount assemblies (16) are positioned around the periphery of the hub shell. Each flexure mount assembly includes ... | 04/18/2000 |
| 6039538 | Multi-blade rotor for a helicopter A multi-blade rotor arrangement free of flapping hinges, for a rotary wing aircraft, includes a rotor head plate (2) made of fiber-reinforced composite material. The head plate (2) includes a plurality of blade connection arms (4) that are elastically fle... | 03/21/2000 |
| 6033182 | Swash-plate device for controlling the pitch of rotor blades with non rotating plate stop track and pin The non-rotating plate of the device is stopped from rotating around the rotor axis by a stop arm with at least one rigid stop track extending substantially axially and secured to the structure of the rotor aircraft. The track works together with a stop p... | 03/07/2000 |
| 5980206 | Monolithic structure having improved flaw tolerance A monolithic structural member (10) operative for reacting steady and vibratory bending moment loads M about an applied loads axis X and having a specially configured cross-sectional configuration for providing improved flaw tolerance. The cross-sectional... | 11/09/1999 |
| 5906476 | Main rotor system for helicopters A swashplate is provided for use in helicopters having a vertical main rotor axis. The swashplate includes a bearing, a first race member including a channel, a second race member including a channel, and a third race member including a channel. The chann... | 05/25/1999 |
| 5853145 | Rotor head for rotary wing aircraft A flexible beam rotor assembly for an aircraft includes a rotor spar having an axis of rotation and a hole through which the axis of rotation passes. A spindle has a teetering connection to the rotor spar, the teetering connection having a teetering axis ... | 12/29/1998 |
| 5826822 | System and method for providing cyclic and collective pitch control in a rotary wing aircraft A cyclic and collective control system is provided for controlling rotor pitch in a rotary wing aircraft. The rotor blades are pivotally mounted on a hollow, spinning shaft. An angularly and vertically displaceable control shaft is mounted with the spinni... | 10/27/1998 |
| 5788462 | Hingeless rotor with intermediate pitch-control rings A hingeless rotor including a rotor mast driven in rotation about an axis of the rotor, a hub secured in terms of rotation to the mast, and at least two blades, each of which is, firstly, joined to the hub by a root attachment part comprising at least one... | 08/04/1998 |
| 5769606 | De-icing connection installation for rotorcraft rotor The installation links a supply conductor to an electrical device for de-icing a blade using at least one cable with a first stretch linked to the supply conductor by a connector and to a second stretch with an overhead hook in the form of flattened half ... | 06/23/1998 |
| 5716193 | Installation for affording electrical continuity for rotorcraft rotor The installation for removing electrostatic charge and passing lightning current between a conductor of each blade of the rotor and a metallic part of the hub comprises at least one conductive member integral with the member for linking the blade to the h... | 02/10/1998 |
| 5645400 | Composite cuff structure for helicopter rotors A composite cuff structure (40) for mounting the root end (14e) of a rotor blade assembly (14) to the radial arms (24a, 24b) of a rotor assembly yoke (24) and for accommodating a twist disparity therebetween. The composite cuff structure (40) is generally... | 07/08/1997 |
| 5511947 | Cyclic pitch control having torsion spring system A pitch control system for a vertically launchable and recoverable winged aircraft includes a collective and cyclic pitch control system, a drive yoke and a rotor hub. The collective and cyclic pitch control system is operably connected to two proprotor b... | 04/30/1996 |
| 5474424 | Rotorcraft rotor head, which is rigid in drag and articulated in pitch and flapping This invention relates to a rotorcraft rotor head which includes an even number of blades arranged in groups of two blades (2) which are diametrically opposed to each other, and linked to each other by a connection system without any link with the rotor h... | 12/12/1995 |
| 5466124 | Device for generating an inversion-kinematic movement A device for converting a rotational movement for directing displacement of a flowable medium is provided with a mount and two rotatably mounted fixed axles which are arranged at a distance from one another on the mount and on which are articulated two en... | 11/14/1995 |
| 5460487 | Pitch adjustment assembly for bearingless main rotors A pitch adjustment assembly (100) for a bearingless rotor assembly (20) which includes a torque tube member (36) enveloping a flexbeam connector (22), which torque tube member (36) defines a geometric center (120) and is operative to impart pitch motion t... | 10/24/1995 |
| 5364230 | Rotor blade subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors A rotor blade subassembly for a rotor assembly having ducted, coaxial counter-rotating rotors includes a flexbeam, an integrated torque tube/spar member, and an aerodynamic fairing or rotor blade. The flexbeam is a laminated composite structure that react... | 11/15/1994 |
| 5340279 | Snubber assembly for a rotor assembly having ducted, coaxial counter-rotating rotors A snubber assembly for a rotor assembly having ducted, coaxial counter-rotating rotors that is design optimized to facilitate utilization of a self-aligning bearing and for installation inboard of the corresponding flexbeam-to-rotor hub attachment joint, ... | 08/23/1994 |
| 5316442 | Articulated rotor head for gyroplanes The invention relates to an articulated rotor head for gyroplanes comprising a rigid central hub body (1), perpendicularly integrated with a drive shaft (2), each blade (3) being radially fixed to the hub body (1) by means of connecting and articulating c... | 05/31/1994 |
