[특허]Process for manufacturing a variable pitch multi-blade propeller by molding resin-impregnated fails around a preform

[미국특허] Process for manufacturing a variable pitch multi-blade propeller by molding resin-impregnated fails around a preform 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B32B-031/20
출원번호	US-0688896 (1985-01-04)
우선권정보	FR-0004448 (1983-03-18)
발명자 / 주소	Mouille RenL. (Aix-en-Provence FRX) Declerco Marc (Pelissane FRX) Jalaguier Jean-Pierre (Vitrolles FRX) Jaugey Bernard (Marseilles FRX)
출원인 / 주소	Societe Nationale Industrielle Aerospatiale (Paris FRX 07)
인용정보	피인용 횟수 : 16 인용 특허 : 5

초록 ▼

A variable pitch multi-blade propeller suitable for use on a helicopter is constructed of a foam preform joined with a fibrous spar enclosed in resin-impregnated foils and fitted with a metal leading edge. Various components are assembled in a mold and the resins, then cured. The structure may further include a reinforcing yoke of carbon fiber fabrics preimpregnated with a polymerizable synthetic resin. The process may further include a heat treating step to effect polymerization.

대표청구항 ▼

A process for manufacturing a rotor blade having a shell with aerodynamic profile having an upper face and a lower face both extending from a blade leading edge part to a blade trailing edge part and each formed of a stacking of at least two foils of high mechanical resistance fiber fabrics rigidified by a polymerized synthetic impregnation resin, a filling body in a foam-like synthetic material which has the same general profile as said shell and is disposed in the latter, extends chordwise from said leading edge part to said trailing edge part and presents a cut-out extending spanwise over all the length of said filling body and opening in a face of said filling body which is turned towards said upper face of said shell, a spar constituted by a single elongated leaf of rovings of fibers with high mechanical resistance agglomerated by a polymerized synthetic resin, said spar having a longitudinal axis substantially parallel to that of the blade and presenting a spanwise extending major part provided with a section corresponding substantially to that of said cut-out, said spar major part being housed and fixed in said cut-out and presenting a spar face turned towards said shell upper face and along which said spar major part is directly fixed against an inner surface part of said shell upper face, said spar further presenting an end part emerging from said shell and arranged as a twistable and flexible spar root part for connecting said spar to a rotor hub, and a metal leading edge cover integrated in said shell in said leading edge part; the process being carried out by means of a lower half mould and a upper half mould provided with complementary impressions having the forms respectively of said lower face and of said upper face and the process comprising the following steps of depositing and stacking in said lower half mould impression said at least two foils of fiber fabrics for forming said shell lower face and which are impregnated with a polymerizable synthetic resin, positioning said filling body, made as a preformed body in a separate equipment, above said stacked foils, disposing a major part of said leaf of rovings of fibers which are agglomerated by a polymerizable synthetic resin in said cut-out of said filling body and arranging an end part of said leaf of rovings beyond spanwise end of said cut-out for forming said spar root part, depositing and stacking said at least two foils of fiber fabrics for forming said shell upper face and which are impregnated with a polymerizable synthetic resin on said stacked foils for forming said shell lower face, said filling body and said leaf of rovings thus assembled in said lower half mould, installing said metal leading edge cover over parts of said stacked foils for forming said shell lower and upper faces which are adjacent to said leading edge part in said lower half mould, placing said upper half mould on said lower half mould so that said stacked foils for forming said shell upper face are positioned in said upper half mould impression, and closing said half moulds against one another, and polymerizing said resins impregnating said foils of fiber fabrics and agglomerating said rovings of fibers of said leaf.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Grimes Richard V. (Piqua OH) Harlamert W. Benjamin (Piqua OH) Thompson David F. (Chester PA), Air craft propeller assembly with composite blades.
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Brogdon Vas H. (Hurst TX) Covington Cecil E. (Hurst TX) Wheelis Richard E. (Hurst TX), Bearingless tail rotor for helicopters.
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Cheney ; Jr. Marvin C. (Glastonbury CT), Matched stiffness rotor flexbeam and blade system.
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Karas ; Joseph Walter, Method of immobilizing a printed circuit board.
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Duret Maurice L. (Aix-en-Provence FRX) Lamarche Bernard L. J. (Velaux FRX) Declercq Marc A. (Pelissanne FRX) Martin Robert D. (Aix-en-Provence FRX), Multi-blade propellers.
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이 특허를 인용한 특허 (16) 인용/피인용 타임라인 분석

Cahill, Kevin; Strauss, Eric; Burchett, Doug; Didandeh, Hooshang; Shogren, Charles Mark, Composite fan.
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Callis, Richard A.; White, Joe; White, legal representative, Jane; Newkirk, Scott, Helicopter blade mandrel.
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Callis, Richard A.; Johnston, Wayne; Gray, Nate; Bailey, David P., Helicopter blade mandrel with roller assembly.
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Callis, Richard A.; Johnston, Wayne; Gray, Nate; Bailey, David P., Helicopter blade mandrel with roller assembly.
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Maille, Laurence; Mouton, Luc, Method and apparatus for manufacturing a helicopter rotor fairing, and a fairing obtained thereby.
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Wang Hsin-Pang ; Lee Martin Kinfei, Method for forming a composite airfoil structure.
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Besse Jean-Luc,FRX ; Gaffiero Jacques,FRX, Method for manufacturing a variable-pitch composite blade for a helicopter rotor.
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Stiesdal,Henrik; Enevoldsen,Peder Bay; Johansen,Kaj; Kristensen,Jens Jørgen Ø; Nørlem,Michael; Winther Jensen,Martin, Method for manufacturing windmill blades.
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Goodridge Harold M. ; Skaggs Kirk D., Method of making a composite part using a compliant forming surface.
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Barbier Bruno J. M. (Sannois FRX) Michaud-Soret Jean A. (Paris FRX), Process for manufacturing a blade.
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Rodde Anne-Marie (Verrieres le Buisson FRX) Reneaux Jol (Paris FRX) Thibert Jean-Jacques (Verrieres le Buisson FRX) Vuillet Alain E. (Bouc Bel-Air FRX), Sections for shrouded propeller blade.
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Ball, Danny; Pfeiffer, Kevin, Single-piece propeller and method of making.
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Ball, Danny; Pfeiffer, Kevin, Single-piece propeller and method of making.
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Pilpel, Edward; Pilpel, Benjamin, Thermoplastic rotor blade.
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Pilpel, Edward; Pilpel, Jr., Benjamin D., Thermoplastic rotor blade.
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Goodridge Harold M. ; Skaggs Kirk D., Tooling having compliant forming surface for forming resin composites.
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A	생활필수품
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[미국특허] Process for manufacturing a variable pitch multi-blade propeller by molding resin-impregnated fails around a preform 원문보기