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| Number | Title | Issue Date |
| 8029240 | Rotor blade adjustable weight retention system In one embodiment, a rotor blade balancing apparatus may include a tube member defining an inner cavity, a plurality of weights, and a biasing member. The tube member may be for the insertion into a cavity of a rotor blade. Each of the weights may be adapted to be s... | 10/04/2011 |
| 7845909 | Assembly for providing flexure to blade system An assembly for providing flexure to a blade of a rotary blade system includes an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween. At least one of the upper and lower yoke su... | 12/07/2010 |
| 7828525 | Soft in-plane tiltrotor hub A rotor hub assembly for a rotary-wing aircraft has a central member and a plurality of blade grips adapted for attaching rotor blades to the central member. The blade grips are pivotally attached to the central member and are capable of pivoting about a pivot axis ... | 11/09/2010 |
| 7811061 | Blade having an integral cuff, and a rotorcraft rotor provided with such a blade A rotorcraft blade is provided having at least one spar and an outer covering. At the root of the blade, the spar is subdivided into at least one bottom tape and at least one top tape. The blade further includes a hollow cuff whose outer wall includes the outer cove... | 10/12/2010 |
| 7695249 | Bearingless rotor blade assembly for a high speed rotary-wing aircraft A bearingless rotor system includes a flexbeam assembly having a first beam and a second beam arranged in a back-to-back orientation with a pitch shaft channeled therebetween. The beams morph into a rotor blade spar at an outboard rotor blade station. The outboard s... | 04/13/2010 |
| 7686584 | Elastomeric bearing with heatable shims An electrically heatable elastomeric bearing provides a multiple of elastomeric material layers and a multiple of shim layers. At least one of the multiple of shim layers includes an electrically heatable shim layer. ... | 03/30/2010 |
| 7665969 | Assembly for providing flexure to blade system An assembly for providing flexure to a blade of a rotary blade system, the assembly including an upper support plate having an upper curved surface, a lower support plate having a lower curved surface, and a yoke positioned therebetween. At least one of the upper an... | 02/23/2010 |
| 7604460 | Rotorcraft rotors having twistable blades A rotorcraft rotor includes a hub , a first blade having a first twistable structure secured to the hub by a first bolt and a first ring or washer , a second blade having a second twistable structure secured to the hub by a second bolt and a second ring or washer. T... | 10/20/2009 |
| 7559743 | Protection system, a bellows hinge, and an aircraft In order to protect a hinge, an elastomer confinement structure is provided presenting: upstream and downstream openings; a static cap; an upstream collar; and a hinge bellows. | 07/14/2009 |
| 7530790 | Rotor blade folding system A rotor blade folding system includes a bearing housing which supports a bearing and rotor blade spindle which folds relative the rotor hub assembly about a fold axis. The rotor blade folding system essentially collapses the rotor hub to facilitate compatibility wit... | 05/12/2009 |
| 7503750 | Variable pitch rotor blade with double flexible retention elements A propulsive thrust device for an engine includes a rotor blade and a hub assembly on which the rotor blade is mounted. The rotor blade comprises an airfoil and at least two support members. A propeller thrust device includes a rotor blade, a central hub at which th... | 03/17/2009 |
| 7384238 | Rotor, rotocraft comprising a rotor of this type and method for adjusting the blade angle of a rotor A rotor, in particular for a rotorcraft, encompassing: a rotor head, at least one rotor blade, and a rotor-head-end rotor-blade connector having an integral, bearingless, centrifugal-force-controlled blade angle adjustment device. A rotorcraft, in particular a helic... | 06/10/2008 |
| 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 |
| 7326036 | Helicopter rotor transmission assembly A helicopter rotor transmission assembly for translating motion of a drive shaft driven by a helicopter engine into rotary motion of a helicopter rotor mast that carries rotor blades. The transmission assembly includes a fixed outer housing, an inner housing carried... | 02/05/2008 |
| 7302999 | Scraper blade and method for scraped-surface heat exchanger A curved scraper blade for a scraped-surface heat exchanger pivots about an axis off the centerline of the blade. The profile of the blade is chosen to provide a low initial scrape angle and to change gradually if at all as the blade wears away in service. The off-c... | 12/04/2007 |
| 7290985 | Rotary wing aircraft rod end and method of making a helicopter vehicle rod end with a precocked orientation The invention provides a rotary wing aircraft helicopter vehicle rod end and method of making a rod end. The rotary wing aircraft rod end includes a nonelastomeric inner member having an outer bonding surface segment and an axial bore with a center bore axis, a none... | 11/06/2007 |
| 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 |
| 7270516 | Non-articulated rotor and rotorcraft comprising a rotor of this type A hingeless rotor, in particular for a rotorcraft, comprising: a rotor head, a rotor mast having a rotor axis, a torque-transmission element nonrotatably joined to the rotor mast, at least one rotor blade, and a rotor-head-side rotor-blade connector having a centrif... | 09/18/2007 |
| 7237944 | Scraped heat exchanger having blade with protective rest nub Attachment apparatus and method for interlocking attachment of a scraper blade with a drive shaft of a scraped surface heat exchanger includes a blade having dual attachment beams and a central locking member, and at least one pin having dual fingers each for interl... | 07/03/2007 |
| 7229251 | Rotor hub fairing system for a counter-rotating, coaxial rotor system A rotor hub fairing system includes an upper hub fairing, a lower hub fairing and a shaft fairing therebetween. The rotor hub fairing system is sized and configured to reduce the overall drag on a dual, counter-rotating, coaxial rotor system. Preferably, the rotor h... | 06/12/2007 |
| 7226272 | Hingeless rotor provided with plate-shaped rotor head element and a rotorcraft provided with said rotor The invention relates to a rotor comprising a rotor shaft, a rotation torque transmission element which is mounted thereon and at least one element of the plate-shaped rotor head whose axis of rotation extends therethrough. Said rotor is provided with two groups of ... | 06/05/2007 |
| 7137590 | Lubricating installation for rocking power transmission box An installation includes at least a pressurized lubricating circuit for elements housed in the rocking crankcase, each circuit including a radial transfer bearing between two opposite cylindrical journals coaxial about the rocking axis, one fixed journal on a fixed ... | 11/21/2006 |
| 7097169 | Elastomeric bearing with modified cylindrical core An elastomeric bearing having inner and outer races and a core. The core has a plurality of resilient laminae and a plurality of non-resilient laminae interleaved with one another. Each of the lamina has an axially inner cylindrical portion of a given diameter, an a... | 08/29/2006 |
| 7047596 | Structural bushing application for highly loaded composites lugs A composite lug assembly includes a composite lug defining a loaded side and an unloaded side and having at least one hole extending therebetween, a shoulder bushing assembly including a first side bushing having a first cylindrical portion adapted to fit in the hol... | 05/23/2006 |
| 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 |
| 7037592 | Hybrid composite of silicone and organic resins A fiber reinforced composite including layers of fibers, each layer being impregnated with a resin. The layers include in combination a layer of an addition cured silicone resin and a layer of an organic resin. The layers form a hybrid composite having a higher modu... | 05/02/2006 |
| 7021897 | Blade pitch control disk device for a rotorcraft rotor A cyclic swashplate device for controlling rotorcraft blade pitch is disclosed for application to rotorcraft swashplates, in particular, in helicopters. A cyclic swashplate device controls the rotorcraft blade pitch. The device (10′), with rotating (10 | 04/04/2006 |
| 6974633 | Structural members having improved resistance to fatigue crack growth An extruded structural member having improved damage tolerance containing a base section (6); a stiffening section having at least one pair of structural stiffeners (10), the structural stiffeners integral with the base section (6) and projectin... | 12/13/2005 |
| 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 |
| 6942461 | Rotor blade hub The present invention concerns a rotor blade hub for a wind power installation. Such a hub represents a mechanical connection between the (horizontal) rotor shaft (rotor spindle) and the rotor blades. This means that all forces which occur at the rotor blades, insof... | 09/13/2005 |
| 6935187 | Test method for assessing thermal mechanical fatigue performance of a test material A test method for testing the thermal mechanical fatigue performance of a test material includes preparing a test specimen of the test material, wherein the test specimen has a base, and a rib extending outwardly from the base. The test specimen is thermally cycled ... | 08/30/2005 |
| 6932574 | Wind power installation The invention concerns a wind power installation. Such wind power installations of modern type, for example one of type E-40 or E-66 from Enercon are usually equipped with a lightning protection system which is known for example from DE 44 36 197. The present... | 08/23/2005 |
| 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 |
| 6902508 | Helicopter mainshaft assembly and drive assembly including the same A helicopter mainshaft for use with a plurality of planet gear assemblies includes an elongated shaft having first and second opposed ends and a midsection located between the first and second ends. The shaft defines a shaft axis extending through the first and seco... | 06/07/2005 |
| 6889965 | Opposing conical preloaded elastomeric bearing assembly The invention provides a weight-reducing bearing assembly for rotary aircraft. An opposed tapered conical elastomeric flap bearing assembly for rotary aircraft includes an outer housing having an outer surface and an inner surface. The outer surface is configured to... | 05/10/2005 |
| 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 |
| 6832894 | Combined ball-and-damper device for a helicopter rotor The invention relates to a combined ball-and-damper device for mounting between firstly a flexible spar connecting a helicopter blade to a rotor hub and secondly a torque tube for controlling the pitch of said blade, the device comprising two individual modules each... | 12/21/2004 |
| 6827553 | Flexbeam damper assembly having transition shim clamp device A damper assembly including a spherical elastomer bearing member, wherein the spherical elastomer bearing member is operable for accommodating relative motion and/or vibration, and a flat elastomer bearing member, wherein the flat elastomer bearing member is operabl... | 12/07/2004 |
| 6764280 | Multi-bladed tail rotor hub design for coriolis relief A multi-bladed tail rotor assembly is disclosed that provides higher aerodynamic performance, damage tolerant design with 10,000-hour life expectancy, and which requires low maintenance through the use of composites and elastomerics. The tail rotor hub assembly incl... | 07/20/2004 |
