[특허]Bearingless hub structure for rotary-wing aircrafts

[미국특허] Bearingless hub structure for rotary-wing aircrafts 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B64C-027/38
출원번호	US-0753338 (1985-07-09)
우선권정보	JP-0142877 (1984-07-10); JP-0098586 (1985-05-09); JP-0132139 (1985-06-18)
발명자 / 주소	Niwa Yoshiyuki (Tachikawa JPX) Kashiwagi Masahiro (Tachikawa JPX) Yasue Masahiro (Funabashi JPX) Bandoh Shunichi (Kakamigahara JPX) Kakinuma Asao (Kakamigahara JPX) Wakatsuki Tadashi (Gifu JPX)
출원인 / 주소	Kawasaki Jukogyo Kabushiki Kaisha (Hyougo JPX 07) Technical Research and Development Institute, Japan Defense Agency (Tokyo JPX 07)
인용정보	피인용 횟수 : 28 인용 특허 : 5

초록 ▼

A bearingless hub structure for rotary-wing aircrafts comprising a hub body secured to a rotor shaft, a plurality of radially extending flexbeams integrally formed with the hub body, and pitch housings enclosing each of the flexbeams in spaced relationship, the pitch housing having a radially outer end portion rigidly secured to an inboard end of a rotor blade and a radially inner end portion supported by a spherical bearing in the vicinity of a root end of said flexbeam. The flexbeam consists of a flexible element of low lead-lag stiffness and a torsion element of low torsional stiffness located radially outside the flexible element. The flexible element consists of two beam-like members having radially inner ends spaced in the lead-lag direction and extending radially outward with narrowing the distance between them, the beam-like member having radially outer end connected to a radially inner end of the torsion element.

대표청구항 ▼

A bearingless hub structure for rotary-wing aircraft comprising: a hub body secured to a rotor shaft, a plurality of radially extending flexbeams integrally formed with said hub body, pitch housings enclosing respective ones of said flexbeams in spaced relationship, each of said pitch housings having a radially outer end portion rigidly secured to an inboard end of a rotor blade and a radially inner end portion supported by spherical bearing means in the vicinity of a root end of said flexbeam, each of said flexbeams including first flexible means of low lead-lag stiffness and second flexible means of low torsional stiffness located radially outside said first flexible means, said first flexible means comprising two beam-like members which extend radially outward, said beam-like members having radially inner ends spaced in the lead-lag direction, and the distance between said beam-like members decreasing in the radially outward direction, said first flexible means having a radially outer end connected to a radially inner end of said second flexible means.

이 특허에 인용된 특허 (5) 인용/피인용 타임라인 분석

Noehren William Lawrence (Huntington CT) Hibyan Edward Stanley (Trumbull CT), Composite helicopter spar and means to alleviate stress concentration.
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Ferris Donald L. (Newtown CT) Ogle Peter C. (Woodbridge CT), Cross beam rotor.
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Caramaschi Vittorio (Gallarate ITX) Castelli Pier Luigi (Busto Arsizio ITX), Helicopter Rotor.
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Weiland Emil (Hohenbrunn DEX) Brunsch Klaus (Weidach DEX), Hingeless rotor system.
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Metzger Robert W. (Hurst TX) Neathery William D. (Fort Worth TX) Reyes Peter A. (Watauga TX) Tisdale Patrick R. (Bedford TX) Covington Cecil E. (Hurst TX) Broekhuizen Willem (Arlington TX), Soft inplane bearingless helicopter rotor.
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이 특허를 인용한 특허 (28) 인용/피인용 타임라인 분석

Kuntze-Fechner, Gerald; Bauer, Markus; Ortner, Martin, Aerodynamic blade attachment for a bearingless rotor of a helicopter.
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Matuska David G. (Beacon Falls CT) Ferris Donald L. (Newtown CT), Apparatus for damping helicopter rotor blade oscillations.
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Stamps, Frank B.; Tisdale, Patrick R.; Braswell, James L.; Baskin, Jr., Charles L.; Campbell, Tom; Ledbetter, Timothy K.; Zierer, Joseph J.; Reddy, D. J.; Wiinikka, Mark A.; Martin, Ronnie L.; Haynie, David A.; Sadler, Stanley Gene; Measom, Ron; Oldroyd, Paul; Hiros, Tricia; Harse, Jim; Mullins, Bob, Assembly for providing flexure to blade system.
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Stamps, Frank B.; Tisdale, Patrick R.; Sherrill, Paul; Rauber, Richard; Campbell, Thomas C.; Braswell, Jr., James Lee; Measom, Ron; Hiros, Tricia; Popelka, David; Southerland, Michael J.; Stanney, Keith; Wasikowski, Mark; Ledbetter, Tim, Assembly for providing flexure to blade system.
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Buesing, Moritz, Beam for a rotorcraft rotor and rotorcraft rotor.
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Kuntze-Fechner, Gerald; Bauer, Markus; Ortner, Martin, Blade attachment for a bearingless rotor of a helicopter.
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Aubry Jacques A. (Bouches-du-Rhne FRX) Mondet Jean J. (Bouches-du-Rhne FRX), Combined bearing device for a rotorcraft rotor and a rotor equipped with such a bearing device.
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Maresh, Andrew; Stamps, Frank Bradley; Tisdale, Patrick Ryan; Wardlaw, Robert Patrick; Haldeman, Andrew; Sutton, Drew Alan, Composite rotor system using two race track style cantilevered yokes.
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Maresh, Andrew; Stamps, Frank Bradley; Tisdale, Patrick Ryan; Wardlaw, Robert; Haldeman, Andrew; Sutton, Drew, Composite rotor system using two race track style cantilevered yokes.
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Meyer, Leon M.; Lay, Richard C.; Schmaling, David N., Elastomeric bearing system motion limiter.
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Matsumoto Tadahiro (Tokyo JPX) Nishikawa Kiyoshi (Tokyo JPX), Flexbeam for rotor blades of helicopter and method for fabrication thereof.
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Hunter, David H.; Casey, Ryan Thomas; Byrnes, Francis Edward, Flexbeam rotor.
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Parsons, Eric S.; Nussenblatt, Eric Lucien; Thomas, Justin; Casey, Ryan Thomas; Hunter, David H., Flexbeam rotor attachment to rotor blade.
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Buesing, Moritz, Flexbeam unit with at least one twisted flexbeam element.
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Sutton, Drew; Stamps, Frank B.; Tisdale, Patrick Ryan; Oldroyd, Paul, Flexing clevis arrangement bolted joint attachment for flexible rotor hub with high offset and high flapping.
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Muylaert, Neal W.; Lamborn, Lyndon Claudius, Method for connecting a tension-torsion strap.
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Muylaert, Neal W.; Lamborn, Lyndon Claudius, Method for connecting a tension-torsion strap.
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Bauer Karl,DEX ; Kuntze-Fechner Gerald,DEX ; Hausmann Gerhard,DEX ; Enenkl Bernhard,DEX, Rotor blade for a bearingless rotor of a helicopter.
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Vertel, John F.; Narayanan Nampy, Sreenivas; Smelcer, Matthew J., Rotor head for a vertical takeoff and landing aircraft.
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Stamps, Frank B.; Tisdale, Patrick R.; Yuce, Mithat, Rotor hub for use with high-inertia blades.
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Hahn Michael (Ottobrunn DEX) Kuntze-Fechner Gerald (Bad Wiessee DEX), Rotor structure, especially for a rotary wing aircraft.
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Hunter, David H.; Casey, Ryan T.; Byrnes, Francis E., Rotor with blades including outer blade shell and inner structural member.
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Wagner Alois (Emmerkofen DEX) Friedberger Otmar (Neubiberg DEX), Rotor, in particular a helicopter rotor.
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Kuntze-Fechner, Gerald; Bauer, Markus, Separable blade attachment for a bearingless rotor of a helicopter.
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Bold, Jens; Klockow, Guenther, Skin of an airplane door and method of making door with same.
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Wagner Alois (Emmerkofen DEX) Friedberger Otmar (Neubiberg DEX), Spring element for connecting two components with angle of rotation mobility.
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Sato Tetsuro (Tokyo JPX), System for damping lead-lag motion of rotor blades of helicopter.
상세보기
Bauer Karl,DEX ; Kuntze-Fechner Gerald,DEX, Two-piece rotor blade for a bearingless rotor of a helicopter.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

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[미국특허] Bearingless hub structure for rotary-wing aircrafts 원문보기