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| Number | Title | Issue Date |
| 5118257 | Boot attachment for composite turbine blade, turbine blade and method of making turbine blade A root attachment for a turbine blade is integrally molded with a composite turbine blade for a ram air turbine. The root attachment includes an insert at the one end of the root attachment for integrally molding within the blade and a hub connector at an... | 06/02/1992 |
| 5076760 | Injection molded, high strength impeller A method of injection molding a thermoplastic material around a two-piece insert having a rotational axis through which a bore passes is disclosed. The insert is formed from two pieces which are axially spaced to define an annular gate through which the i... | 12/31/1991 |
| 5042968 | Propeller blade subassembly and method for making a propeller blade subassembly A propeller blade spar/foam subassembly is manufactured by disposing a lamination of prepreg within a mold, closing the mold about a spar and injecting foam into mold cavities formed at the lead edge and the trailing edge of the spar.... | 08/27/1991 |
| 4990205 | Process for manufacturing a blade The blade of composite materials and its manufacturing process according to the invention are such that the spar includes at least one bundle (10a, 10b) extending longitudinally in the shell (4), between the fillings of the leading edge (12a) and the trai... | 02/05/1991 |
| 4976587 | Composite wind turbine rotor blade and method for making same A wind turbine rotor blade including NASA LS (1) - 04xx airfoil sections having a twist not greater than 8° and a construction for such a blade which includes no parting line along the leading edge. The bond between a rectangular spar and the outer skin ... | 12/11/1990 |
| 4971641 | Method of making counterrotating aircraft propeller blades An aircraft propeller blade is constructed by forming two shells of composite material laminates and bonding the two shells to a metallic spar with foam filler pieces interposed between the shells at desired locations. The blade is then balanced radially ... | 11/20/1990 |
| 4892462 | Blade of composite materials and its manufacturing process The blade of composite materials and its manufacturing process according to the invention are such that the spar includes at least one bundle (10a, 10b) extending longitudinally in the shell (4), between the fillings of the leading edge (12a) and the trai... | 01/09/1990 |
| 4806077 | Composite material blade with twin longeron and twin box structure having laminated honeycomb sandwich coverings and a method of manufacturing same A composite material blade is provided having a twin longeron and twin box structure with laminated honeycomb sandwich coverings, including a front leading edge longeron of a C shaped section, a central longeron with two sole pieces at the ends of a trans... | 02/21/1989 |
| 4789304 | Insulated propeller blade A propeller blade is insulated to withstand the high temperature exhaust of a gas turbine engine. The blade has a spar, a skin covering the spar and forming a contour of the blade, and an insulating layer disposed between the spar and the skin along the p... | 12/06/1988 |
| 4789305 | Self-feathering rotary wing A controllable lifting rotary wing for an aircraft wherein each rotor blade is mounted in such a manner that it has freedom to oscillate in pitch about its feathering axis. The aerodynamic center on each rotor blade is displaced forward of this feathering... | 12/06/1988 |
| 4784575 | Counterrotating aircraft propulsor blades A propulsor blade for an aircraft engine includes an airfoil section formed in the shape of a scimitar. A metallic blade spar is interposed between opposed surfaces of the blade and is bonded to the surfaces to establish structural integrity of the blade.... | 11/15/1988 |
| 4739954 | Over-lap rib joint A method for joining the upper surface of a wing to its lower surface during assembly of the wing, and a novel internal wing structure. The method and structure uses multiple overlapping rib pairs. A rib is attached to the upper surface of the wing and ov... | 04/26/1988 |
| 4732542 | Large airfoil structure and method for its manufacture An airfoil particularly suited for use in rotor blades of large wind-driven ower plants is formed in three modular sections including a nose or leading section, a spar section and a trailing section, each separately formed and subsequently assembled. In th... | 03/22/1988 |
| 4728263 | Wind turbine blade construction A strong, lightweight blade provided for use on wind turbines utilizes an interior reinforcing strut which extends part-way out the blade and consists of telescoped steel pipes welded to one another and mounted at their root ends to a steel cuff. A carbon... | 03/01/1988 |
| 4696623 | Helicopter rotor blade made from a multispar composite material with torsion compartments and a process for manufacturing same The invention provides a helicopter rotor blade made from a composite material whose multistrut resistant framework adjacent the leading edge is disposed so as to form two superimposed compartments.... | 09/29/1987 |
| 4671471 | Foam reinforced aluminum wing structure An aircraft or sailboat structure and the method of manufacturing it in which the wing is formed of an elongated leading edge core of lightweight formable cellular material having an aerodynamically configured semi-circular forward surface and a substanti... | 06/09/1987 |
| 4657615 | Composite leading edge/spar member for an aircraft control surface This invention relates to an improved composite material leading edge/spar member for an aircraft control surface, and the like. The present invention provides a one-piece composite leading edge/spar member that is of a lighter and stronger construction o... | 04/14/1987 |
| 4650534 | Helicopter blade longitudinal member and relative manufacturing method There is disclosed a longitudinal member for a helicopter blade made by placing inside an open mold an open outer covering on which covering and in contact with are arranged a number of uncured axial straps which define top and bottom backs of the longitu... | 03/17/1987 |
| 4648921 | Method of making fiber reinforced articles An improved method is disclosed for forming articles, especially airfoils, comprised of a fiber reinforced plastic bonded to a metal object. In the manufacture of a propeller blade a subassembly is made by coating a metal spar with a certain class of adhe... | 03/10/1987 |
| 4643646 | Large airfoil structure and method for its manufacture An airfoil particularly suited for use in rotor blades of large wind-driven ower plants is formed in three modular sections including a nose or leading section, a spar section and a trailing section, each separately formed and subsequently assembled. In th... | 02/17/1987 |
| 4626173 | Variable-pitch multi-blade propeller incorporating individually dismountable blades made of composite materials, process for manufacturing such blades and blades thus produced Each blade is fixed to the hub by the root part of the spar, arranged in the form of a loop surrounding a connection element bolted on the hub, with the interposition of rigid rings by a pin simultaneously fixing the hub on a drive sleeve transmitting the... | 12/02/1986 |
| 4626172 | Variable-pitch multi-blade propeller incorporating individually dismountable blades made of composite materials, process for manufacturing such blades and blades thus produced Each blade is fixed to the hub by the root part of the spar, arranged in the form of a loop surrounding a connection element bolted on the hub, with the interposition of rigid rings by a pin simultaneously fixing the hub on a drive sleeve transmitting the... | 12/02/1986 |
| 4621980 | Fiber reinforced composite spar for a rotary wing aircraft The present invention discloses a damage tolerant composite article comprising a plurality of layers of both graphite and polyaramide fibers. The graphite fiber layers are oriented at angles of about &#b1;30° and about &#b1;15° to the longitudinal axis ... | 11/11/1986 |
| 4616977 | Hubless, hingeless and bearingless helicopter rotor system A helicopter rotor system in which a plurality of rotor blades are attached to the rotor mast. Each blade has a spar formed of fibers bundled and bonded together inside a skin. These fibers are divided into two bundles, each of which has a bight with a be... | 10/14/1986 |
| 4601639 | Nodalized rotor A nodalized rotor system is provided for a multi-bladed helicopter. Equally spaced radial arms each have an inboard flapping section to accommodate beam-wise blade flapping and an outboard flex section to accommodate pitch changes. A blade is coupled to t... | 07/22/1986 |
| 4557666 | Wind turbine rotor A fixed pitch wind turbine rotor (18) is teeter mounted (76, 78, 80) onto a low speed input shaft (44) which is connected to the input (58) of a step-up transmission (46). The output (48) of the transmission (46) is connected to a rotary pole amplitude mo... | 12/10/1985 |
| 4538780 | Ultralight composite wing structure A composite wing structure for an aircraft, missile and the like. The structure characterized by the use of ultralight materials and having a potential of being stealthy.... | 09/03/1985 |
| 4494910 | Large surface structural component, especially rotor blade A large surface structural component, such as a rotor blade for a windmill r a blade root for a windmill rotor, includes a hollow core (6) of foam material supporting a shell (8, 11) of fiber reinforced synthetic material. Positive templates in the form of... | 01/22/1985 |
| 4474536 | Wind turbine blade joint assembly and method of making wind turbine blades Hollow wind turbine blades and the like comprising abutting blade sections, with nose forming strips and converging walls forming a tail section connecting with the ends of the nose forming strips, and a method of fabricating them comprising machining the... | 10/02/1984 |
| 4473199 | Rotary wing aircraft A one-man helicopter comprising a fuselage having a rotor shaft attached thereto but offset therefrom, rotor blades having rocket engines in the tips thereof, a hub on the shaft and means on the hub between the rotor blades and the rotor shaft to change t... | 09/25/1984 |
| 4470862 | Manufacture of fiber reinforced articles In a method for manufacturing a fiber reinforced article, a plurality of sheets of fibrous material (38 and 40) each having minute quantities of a thermoplastic adhesive (50) on a single surface thereof are laid up on a suitable form such that the adhesiv... | 09/11/1984 |
| 4452658 | Method for making a helicopter rotor blade A method for making a helicopter rotor blade having a longitudinal axis and a monolithic spar comprising a longitudinally-extending counterweight, a root member attached to the counterweight, and a retention means retained by and projecting laterally from... | 06/05/1984 |
| 4439106 | Rotor blade shaft integrity monitoring system A helicopter rotor blade to hub arm attachment configured to react centrifugal loads from the blade through a blade cuff, spindle, and elastomeric bearings utilizes a bolt in the bore of the spindle for secondary load path operation and a spindle integrit... | 03/27/1984 |
| 4408958 | Wind turbine blade A wind turbine blade of large size for a wind turbine (14) having three blades (16) and used to generate electrical power is contoured to minimize stalling and to provide unusually good efficiency. The cross section of the blade tapers from a configuratio... | 10/11/1983 |
| 4407688 | Method of making helicopter blade spars A method for making helicopter blade spars in which a tape of reinforced resin is laid up with a continuous circulatory movement along an annular path defined by a lateral surface of a former of a forming mould in such a way as to define an annular body c... | 10/04/1983 |
| 4403918 | Hubless, hingeless and bearingless helicopter rotor system A helicopter rotor system with a plurality of identical rotor blades each of which includes a skin that forms an interior region, a counterweight rod and a bundle of longitudinally-extending fibers in the region. The bundle continues outside of the region... | 09/13/1983 |
| 4389162 | Rotor blade comprising a plurality of individual sections A rotor blade, for example for a windmill, comprises a plurality of blade ctions between a blade root and a tip. The sections are interconnected by tensioning members such as steel cables or the like, preferably extending through the blade sections. Thus,... | 06/21/1983 |
| 4373862 | Rotor blade shaft integrity monitoring system A helicopter rotor blade to hub arm attachment configured to react centrifugal loads from the blade through a blade cuff, spindle, and elastomeric bearings utilizes a pre-loaded bolt through the spindle for load sharing therewith and a spindle integrity m... | 02/15/1983 |
| 4366387 | Wind-driven generator apparatus and method of making blade supports _therefor Wind generator apparatus employs an induction generator with a wind-driven rotor. Connection of the induction generator to AC power lines is controlled by apparatus that compares generator rpm and line frequency. The rotor blades have a pretwisted, varyin... | 12/28/1982 |
| 4360871 | Method for fabricating wind turbine blades The manufacture of large scale wind turbine blades is accomplished by winding composite fiber materials onto a mandrel to form the desired airfoil shape. The winding process requires that the fibers always maintain contact with the mandrel surface. If the... | 11/23/1982 |
