FR2030036B1 - - Google Patents
Info
- Publication number
- FR2030036B1 FR2030036B1 FR6927311A FR6927311A FR2030036B1 FR 2030036 B1 FR2030036 B1 FR 2030036B1 FR 6927311 A FR6927311 A FR 6927311A FR 6927311 A FR6927311 A FR 6927311A FR 2030036 B1 FR2030036 B1 FR 2030036B1
- Authority
- FR
- France
- Prior art keywords
- mandrel
- layers
- fibers
- varied
- wound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0025—Producing blades or the like, e.g. blades for turbines, propellers, or wings
- B29D99/0028—Producing blades or the like, e.g. blades for turbines, propellers, or wings hollow blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
- B29C69/002—Winding
- B29C69/003—Winding and cutting longitudinally, e.g. for making O-rings; chain links, insulation tubes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/347—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation combined with compressing after the winding of lay-ups having a non-circular cross-section, e.g. flat spiral windings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
- B29C70/446—Moulding structures having an axis of symmetry or at least one channel, e.g. tubular structures, frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
- B29C70/545—Perforating, cutting or machining during or after moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/46—Blades
- B64C27/473—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2305/00—Use of metals, their alloys or their compounds, as reinforcement
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2309/00—Use of inorganic materials not provided for in groups B29K2303/00 - B29K2307/00, as reinforcement
- B29K2309/08—Glass
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/08—Blades for rotors, stators, fans, turbines or the like, e.g. screw propellers
- B29L2031/082—Blades, e.g. for helicopters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/46—Blades
- B64C27/473—Constructional features
- B64C2027/4733—Rotor blades substantially made from particular materials
- B64C2027/4736—Rotor blades substantially made from particular materials from composite materials
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Aviation & Aerospace Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19681779433 DE1779433C (de) | 1968-08-10 | Verfahren zur Herstellung eines Verbundbaukörpers mit tragflügelartiger Gestaltung aus faserverstärktem Kunststoff, insbesondere eines Rotorblattes für Drehflügelflugzeuge |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2030036A1 FR2030036A1 (fr) | 1970-10-30 |
FR2030036B1 true FR2030036B1 (fr) | 1974-02-01 |
Family
ID=5703899
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR6927311A Expired FR2030036B1 (fr) | 1968-08-10 | 1969-08-08 |
Country Status (3)
Country | Link |
---|---|
US (1) | US3713753A (fr) |
FR (1) | FR2030036B1 (fr) |
GB (1) | GB1262704A (fr) |
Families Citing this family (73)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3779487A (en) * | 1971-04-19 | 1973-12-18 | L Ashton | Light weight contoured load carrying structure |
US3782856A (en) * | 1972-05-31 | 1974-01-01 | United Aircraft Corp | Composite aerodynamic blade with twin-beam spar |
US3962506A (en) * | 1974-04-29 | 1976-06-08 | Fiber Science, Inc. | Multi-chambered cellular structure and method for manufacture |
US4037988A (en) * | 1974-11-25 | 1977-07-26 | The Boeing Company | Flexure having pitch flap coupling |
US3943020A (en) * | 1974-12-05 | 1976-03-09 | Fiber Science, Inc. | Filament wound blade and method for manufacturing same |
US4083656A (en) * | 1975-03-21 | 1978-04-11 | Textron, Inc. | Composite rotor blade |
GB1526433A (en) * | 1975-08-06 | 1978-09-27 | Secr Defence | Helicopter rotor blades |
US4022547A (en) * | 1975-10-02 | 1977-05-10 | General Electric Company | Composite blade employing biased layup |
DE2558882C3 (de) * | 1975-12-27 | 1979-10-11 | Walter 5300 Bonn Schoenball | Aufbau eines Rotors, insbesondere für Windkraftmaschinen |
US4028003A (en) * | 1976-04-12 | 1977-06-07 | United Technologies Corporation | Torsionally compliant helicopter rotor blade with improved stability and performance characteristics |
US4096012A (en) * | 1976-08-30 | 1978-06-20 | The Boeing Company | Method of forming a spar layup for an aerodynamic rotor blade |
US4081220A (en) * | 1976-12-17 | 1978-03-28 | United Technologies Corporation | Semi-spar wound blade |
FR2381662A1 (fr) * | 1977-02-28 | 1978-09-22 | Aerospatiale | Pale, notamment pour un rotor d'helicoptere, et son procede de fabrication |
US4227857A (en) * | 1977-08-19 | 1980-10-14 | Textron, Inc. | Composite flexural yoke for helicopters |
DE2856400C2 (de) * | 1978-01-03 | 1987-04-30 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland, London | Tragflügel, insbesondere für Drehflügelflugzeuge |
US4248649A (en) * | 1978-01-19 | 1981-02-03 | Rolls-Royce Limited | Method for producing a composite structure |
US4247258A (en) * | 1978-11-13 | 1981-01-27 | United Technologies Corporation | Composite wind turbine blade |
US4242160A (en) * | 1979-02-02 | 1980-12-30 | United Technologies Corporation | Method of winding a wind turbine blade using a filament reinforced mandrel |
US4260332A (en) * | 1979-03-22 | 1981-04-07 | Structural Composite Industries, Inc. | Composite spar structure having integral fitting for rotational hub mounting |
US4316700A (en) * | 1979-04-03 | 1982-02-23 | Schramm Burford J | Unitary, bonded-together helicopter rotorblade |
US4452658A (en) * | 1979-04-03 | 1984-06-05 | Schramm Burford J | Method for making a helicopter rotor blade |
US4366387A (en) * | 1979-05-10 | 1982-12-28 | Carter Wind Power | Wind-driven generator apparatus and method of making blade supports _therefor |
US4304694A (en) * | 1979-12-03 | 1981-12-08 | United Technologies Corporation | High damping epoxy resin composite |
US4339230A (en) * | 1980-04-22 | 1982-07-13 | Hercules Incorporated | Bifoil blade |
US4470862A (en) * | 1982-05-27 | 1984-09-11 | United Technologies Corporation | Manufacture of fiber reinforced articles |
US4621980A (en) * | 1984-09-19 | 1986-11-11 | United Technologies Corporation | Fiber reinforced composite spar for a rotary wing aircraft |
US4741943A (en) * | 1985-12-30 | 1988-05-03 | The Boeing Company | Aerodynamic structures of composite construction |
FR2602739B1 (fr) * | 1986-07-28 | 1988-11-18 | Aerospatiale | Pale en materiaux composites, a structure bilongeron et bicaisson, et a revetement stratifies a sandwich de nid d'abeilles, et son procede de fabrication |
US5074753A (en) * | 1989-10-16 | 1991-12-24 | Bell Helicopter Textron Inc. | Rotor blade |
US5106282A (en) * | 1989-12-18 | 1992-04-21 | Fmc Corporation | Apparatus for rapidly laying up, and curing thick complex shaped resin matrix composites |
DE4005771C1 (en) * | 1990-02-23 | 1991-09-19 | Deutsche Forschungsanstalt Fuer Luft- Und Raumfahrt Ev, 5300 Bonn, De | Cpd. fibre coupling mfg. - uses tubular wound section flanked by conical wound sections to be compressed into flanges |
US5269657A (en) * | 1990-07-20 | 1993-12-14 | Marvin Garfinkle | Aerodynamically-stable airfoil spar |
US5487806A (en) * | 1990-08-08 | 1996-01-30 | Viellard; Paul-Henri | Method for embodying a flexible tubular element impregnated with resin to be subsequently moulded |
FR2671756B1 (fr) * | 1991-01-21 | 1999-07-02 | Vieillard Paul Henri | Procede pour la realisation d'une nappe de fibres resistantes enduites de resine, formant un materiau dont l'anisotropie peut etre controlee. |
EP0470896A3 (en) * | 1990-08-08 | 1992-07-08 | Paul Henri Viellard | Method for producing a flexible resin impregnated tubular article |
US5127802A (en) * | 1990-12-24 | 1992-07-07 | United Technologies Corporation | Reinforced full-spar composite rotor blade |
US6422958B1 (en) | 1994-02-24 | 2002-07-23 | David W. Repetto | Frame for a game racquet formed by filament winding |
US5575875A (en) * | 1994-02-24 | 1996-11-19 | Wilson Sporting Goods Co. | Filament wound fiber reinforced thermoplastic frame for a game racquet |
US5540877A (en) * | 1994-02-24 | 1996-07-30 | Wilson Sporting Goods Co. | Method of making a continous fiber reinforced resin transfer molded frame for a game racquet |
US5575881A (en) * | 1994-02-24 | 1996-11-19 | Wilson Sporting Goods Co. | Filament wound frame for a game racquet |
US5868351A (en) * | 1996-05-23 | 1999-02-09 | Bell Helicopter Textron Inc. | Rotor blade stowing system |
USD409299S (en) * | 1997-05-21 | 1999-05-04 | Aloha Housewares Co. Ltd. | Combined ceiling fan support arm and blade |
US5967754A (en) * | 1997-12-24 | 1999-10-19 | Aloha Housewares Co., Ltd. | One-piece ceiling fan arm and blade unit |
DK175562B1 (da) * | 2002-03-19 | 2004-12-06 | Lm Glasfiber As | Vindmöllevinge med kulfibertip |
DK175275B1 (da) * | 2002-03-19 | 2004-08-02 | Lm Glasfiber As | Overgangsområde i vindmöllevinge |
DE10217918C1 (de) * | 2002-04-23 | 2003-08-07 | Xperion Gmbh | Verfahren zur Herstellung von Bauteilen als Faser-Kunststoff-Verbund |
US7521105B2 (en) * | 2003-03-06 | 2009-04-21 | Vestas Wind System A/S | Connection between composites with non-compatible properties and method for preparation |
US7228611B2 (en) * | 2003-11-18 | 2007-06-12 | The Boeing Company | Method of transferring large uncured composite laminates |
US7066717B2 (en) * | 2004-04-22 | 2006-06-27 | Siemens Power Generation, Inc. | Ceramic matrix composite airfoil trailing edge arrangement |
US7802968B2 (en) * | 2005-07-29 | 2010-09-28 | General Electric Company | Methods and apparatus for reducing load in a rotor blade |
DE102006022272C5 (de) * | 2006-05-11 | 2013-07-25 | Repower Systems Ag | Rotorblattanschluss |
GB2449058B (en) * | 2007-01-20 | 2011-08-10 | Smiths Aerospace Group Ltd | Blades |
FR2926785B1 (fr) * | 2008-01-25 | 2010-02-19 | Eurocopter France | Pale de giravion munie d'un longeron integrant une attache de fixation,et procede de fabrication d'un tel longeron. |
GB2472460B (en) * | 2009-08-07 | 2011-11-16 | Gurit | Wind or tidal turbine blade having an attachment |
ES2423186T3 (es) * | 2009-08-20 | 2013-09-18 | Siemens Aktiengesellschaft | Estructura de plástico reforzado con fibra y método para producir la estructura de plástico reforzado con fibra |
US8167570B2 (en) * | 2009-12-14 | 2012-05-01 | General Electric Company | Fluid turbine blade and method of providing the same |
CA2784256A1 (fr) * | 2009-12-18 | 2011-06-23 | Magna International Inc. | Melange a mouler en feuille avec noyaux |
FR2956856A1 (fr) * | 2010-02-26 | 2011-09-02 | Eurocopter France | Pale a vrillage adaptatif, et rotor muni d'une telle pale |
US8500407B1 (en) | 2010-03-28 | 2013-08-06 | The Boeing Company | Composite blade root-end drill-through lug and attachment method |
GB201016548D0 (en) * | 2010-10-01 | 2010-11-17 | Vestas Wind Sys As | Wind turbines |
CA2816509C (fr) * | 2010-11-12 | 2016-02-23 | Bell Helicopter Textron Inc. | Pale de rotor composite a materiau pondere pour equilibrage de messe |
TWI474919B (zh) * | 2012-03-28 | 2015-03-01 | Blade Structure and Fabrication Method of Composite Material Wind Turbine | |
US9745751B2 (en) * | 2013-02-26 | 2017-08-29 | University Of Connecticut | Reinforced structural column system |
US9682773B2 (en) | 2013-06-25 | 2017-06-20 | The Boeing Company | Systems and methods for blade attachment |
DE102013215384A1 (de) * | 2013-08-05 | 2015-02-26 | Wobben Properties Gmbh | Verfahren zur Herstellung eines Verbundformteils, Verbundformteil, Sandwichbauteil und Rotorblattelement und Windenergieanlage |
BR112016024391B1 (pt) * | 2014-04-24 | 2021-07-06 | Lm Wp Patent Holding A/S | sistema e método para fabricação de pá de turbina eólica |
FR3023748B1 (fr) | 2014-07-18 | 2016-08-26 | Airbus Helicopters | Procede de fabrication d'un longeron d'une pale, de fabrication d'une pale, et une pale |
FR3023747B1 (fr) | 2014-07-18 | 2017-03-10 | Airbus Helicopters | Procede de fabrication d'un longeron d'une pale, et de fabrication d'une pale |
EP3056330B1 (fr) * | 2015-02-16 | 2019-11-13 | Teijin Aramid B.V. | Panneaux fabriqués à partir d'articles creux cylindriques |
AU2016219741B2 (en) | 2016-08-29 | 2022-09-15 | The Boeing Company | A method and system for fabricating a composite structure |
CN109305359A (zh) * | 2017-07-28 | 2019-02-05 | 中交遥感载荷(安徽)科技有限公司 | 一种农业无人机螺旋桨及其制作方法 |
EP3723972B1 (fr) * | 2017-12-14 | 2023-03-22 | LM Wind Power A/S | Système et procédé de fabrication d'une pale d'éolienne renforcée |
MX2021010507A (es) * | 2019-03-01 | 2021-10-13 | Gen Electric | Aspa de rotor de turbina eolica unida con bujes de perno extensibles para cuerdas del aspa diseñadas para minimizar la separacion de las cuerdas del aspa. |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL39320C (nl) * | 1933-01-12 | 1936-11-16 | Schwarz Gustav Gmbh | Werkwijze voor het maken van een beschermend overtrek uit cellulosederivaten of dergelijke oplosbare stoffen op luchtschroeven uit hout of een overeenkomstig poreuze stof |
US2175204A (en) * | 1938-01-13 | 1939-10-10 | Lougheed Victor | Air propeller blade |
US2202013A (en) * | 1938-01-13 | 1940-05-28 | Lougheed Victor | Reinforced plastic and material therefor |
US2202014A (en) * | 1938-02-10 | 1940-05-28 | Lougheed Victor | Air propeller blade and material for making same |
US2380336A (en) * | 1941-03-17 | 1945-07-10 | William B Scarborough | Aircraft construction |
US2414125A (en) * | 1943-06-25 | 1947-01-14 | Jr George B Rheinfrank | Structural material for aircraft |
US2995777A (en) * | 1956-06-04 | 1961-08-15 | Studebaker Packard Corp | Machine for prestressing and molding reinforced plastic members |
GB831380A (en) * | 1957-05-09 | 1960-03-30 | United Aircraft Corp | Aircraft sustaining or propelling blades |
US3021246A (en) * | 1957-05-17 | 1962-02-13 | Hutter Ulrich | Process for producing a structure of fiber reinforced plastic material |
US3237697A (en) * | 1963-02-11 | 1966-03-01 | Boeing Co | Helicopter rotor blade |
-
1969
- 1969-07-30 GB GB38323/69A patent/GB1262704A/en not_active Expired
- 1969-08-05 US US00847668A patent/US3713753A/en not_active Expired - Lifetime
- 1969-08-08 FR FR6927311A patent/FR2030036B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
GB1262704A (en) | 1972-02-02 |
DE1779433A1 (de) | 1971-08-12 |
US3713753A (en) | 1973-01-30 |
FR2030036A1 (fr) | 1970-10-30 |
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