IT1162418B - Perfezionamento nei rotori di elicotteri - Google Patents
Perfezionamento nei rotori di elicotteriInfo
- Publication number
- IT1162418B IT1162418B IT50224/79A IT5022479A IT1162418B IT 1162418 B IT1162418 B IT 1162418B IT 50224/79 A IT50224/79 A IT 50224/79A IT 5022479 A IT5022479 A IT 5022479A IT 1162418 B IT1162418 B IT 1162418B
- Authority
- IT
- Italy
- Prior art keywords
- improvement
- helicopter rotors
- helicopter
- rotors
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/32—Rotors
- B64C27/35—Rotors having elastomeric joints
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Aviation & Aerospace Engineering (AREA)
- Support Of The Bearing (AREA)
- Vibration Prevention Devices (AREA)
- Vibration Dampers (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Braking Arrangements (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US05/941,255 US4257739A (en) | 1978-09-11 | 1978-09-11 | Soft inplane helicopter rotor |
Publications (2)
Publication Number | Publication Date |
---|---|
IT7950224A0 IT7950224A0 (it) | 1979-09-10 |
IT1162418B true IT1162418B (it) | 1987-04-01 |
Family
ID=25476184
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT50224/79A IT1162418B (it) | 1978-09-11 | 1979-09-10 | Perfezionamento nei rotori di elicotteri |
Country Status (13)
Country | Link |
---|---|
US (1) | US4257739A (it) |
JP (1) | JPS5555098A (it) |
AR (1) | AR222664A1 (it) |
AU (1) | AU528307B2 (it) |
BR (1) | BR7905658A (it) |
CA (1) | CA1102772A (it) |
DE (1) | DE2936163A1 (it) |
ES (1) | ES484030A1 (it) |
FR (1) | FR2435390A1 (it) |
GB (1) | GB2030099B (it) |
IL (1) | IL58218A (it) |
IT (1) | IT1162418B (it) |
MX (1) | MX6954E (it) |
Families Citing this family (57)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1117626B (it) * | 1979-02-02 | 1986-02-17 | Aereonautiche Giovanni Augusta | Rotore articolato per elicotteri |
US4430045A (en) | 1979-04-24 | 1984-02-07 | Bell Helicopter Textron, Inc. | Helicopter power train for distributing rotor blade flapping displacements through a plurality of drive train components |
GB2059897A (en) * | 1979-10-02 | 1981-04-29 | Messerschmitt Boelkow Blohm | Helicopter rotor blade-to-hub connections |
IT1129070B (it) * | 1980-04-03 | 1986-06-04 | Agusta Aeronaut Costr | Rotore a giunti elastomerici per elicotteri |
IT1155132B (it) * | 1982-03-11 | 1987-01-21 | Agusta Aeronaut Costr | Rotore per elicotteri |
US4427340A (en) | 1982-06-24 | 1984-01-24 | Bell Helicopter Textron Inc. | Soft inplane bearingless helicopter rotor |
US4522563A (en) * | 1982-07-06 | 1985-06-11 | Bell Helicopter Textron, Inc. | Elastomeric system for mounting a helicopter rotor |
US4543040A (en) * | 1982-09-30 | 1985-09-24 | The Boeing Company | Helicopter rotor system |
IT1159375B (it) * | 1983-03-15 | 1987-02-25 | Agusta Aeronaut Costr | Rotore per elicotteri |
IT1196800B (it) * | 1986-11-25 | 1988-11-25 | Agusta Aeronaut Costr | Rotore anticoppia per elicotteri |
FR2613319B1 (fr) * | 1987-03-30 | 1989-06-30 | Aerospatiale | Dispositif de palier combine pour rotor de giravion, et rotor equipe d'un tel dispositif de palier |
US4886419A (en) * | 1988-09-30 | 1989-12-12 | The Boeing Company | Elastomeric bearing for helicopter rotor having lead-lag damping |
US5035576A (en) * | 1989-10-11 | 1991-07-30 | United Technologies Corporation | Propeller blade pin attachment |
US5059094A (en) * | 1989-10-13 | 1991-10-22 | Bell Helicopter Textron, Inc. | Rotor redundant force retention system for vtol and vstol aircraft |
US5118256A (en) * | 1991-04-29 | 1992-06-02 | United Technologies Corporation | Blade retention apparatus with elastomeric preload |
FR2685675B1 (fr) * | 1991-12-26 | 1994-04-01 | Aerospatiale Ste Nationale Indle | Dispositif de palier elastomerique cylindrique a grand debattement angulaire. |
FR2685676B1 (fr) * | 1991-12-27 | 1994-04-01 | Aerospatiale Ste Nationale Indle | Tete de rotor articule pour giravion. |
US5374039A (en) * | 1992-08-24 | 1994-12-20 | Lord Corporation | Fluid-and-elastomer support device |
CA2149673C (en) * | 1992-12-23 | 1998-08-18 | Francis E. Byrnes | Tubular elastomer damper |
US5913659A (en) * | 1993-11-22 | 1999-06-22 | United Technologies Corporation | Apparatus and method for adjusting rotor blade tracking |
US5501434A (en) * | 1994-05-10 | 1996-03-26 | Lord Corporation | Hybrid fluid and elastomer damper |
US5620305A (en) * | 1995-03-20 | 1997-04-15 | The Boeing Company | Hub for rotary wing aircraft |
US6481894B1 (en) * | 2001-02-23 | 2002-11-19 | Lord Corporation | Pitch bearing |
FR2839945B1 (fr) * | 2002-05-24 | 2004-08-13 | Hutchinson | Dispositif combine amortisseur-rotule pour rotor d'helicoptere |
ATE359958T1 (de) * | 2004-09-28 | 2007-05-15 | Agusta Spa | Hubschrauberrotor mit einem schwingungsdämpfer |
EA200900036A1 (ru) * | 2006-06-20 | 2009-06-30 | Белл Хеликоптер Текстрон Инк. | Центробежный подшипник с постоянным моментом тангажа |
CH704541A2 (de) * | 2011-02-28 | 2012-08-31 | Marenco Swisshelicopter AG Engineering & Consulting | Rotorblattkopplungsvorrichtung. |
WO2013002784A1 (en) * | 2011-06-29 | 2013-01-03 | Bell Helicopter Textron Inc. | Rotor hub for use with high-inertia blades |
US9327832B2 (en) * | 2011-10-03 | 2016-05-03 | Bell Helicopter Textron Inc. | Elastomeric bearing with tapered shims |
US9085357B2 (en) * | 2011-11-15 | 2015-07-21 | Textron Innovations Inc. | Rotor hub bearing system |
US8695918B2 (en) | 2012-01-10 | 2014-04-15 | Bell Helicopter Textron Inc. | Bearing restraint for rotor systems |
US8857756B2 (en) * | 2012-07-19 | 2014-10-14 | Bell Helicopter Textron Inc. | Elastomeric bearing housing and mating grip for helicopter rotor system |
US9656747B2 (en) * | 2013-03-14 | 2017-05-23 | Bell Helicopter Textron Inc. | Soft in-plane and stiff out-of-plane rotor system |
US9334048B2 (en) * | 2013-09-18 | 2016-05-10 | Bell Helicopter Textron Inc. | Elastomeric bearing having tapered layers |
US9764831B2 (en) | 2014-03-10 | 2017-09-19 | Bell Helicopter Textron Inc. | Articulated main rotor hub with inwardly CF bearing and 3% flapping hinge offset |
US9347487B2 (en) * | 2014-05-30 | 2016-05-24 | Bell Helicopter Textron Inc. | Rotorcraft bearing with rotation slip joint |
US10472057B2 (en) | 2016-02-16 | 2019-11-12 | Bell Helicopter Textron Inc. | Rotor assembly with high lock-number blades |
US10457388B2 (en) | 2016-02-16 | 2019-10-29 | Bell Helicopter Textron, Inc. | Rotor assembly with high lock-number blades |
EP3216695B1 (en) * | 2016-02-16 | 2019-06-19 | Bell Helicopter Textron Inc. | Rotor assembly with high lock-number blades |
CA3004054C (en) | 2017-05-05 | 2024-02-13 | Laflamme Aero Inc. | Helicopter rotor hub assembly and helicopter including same |
US10479497B2 (en) * | 2017-07-13 | 2019-11-19 | Bell Textron Inc. | Inboard bearing assemblies having load transfer shoe bolts |
US10486807B2 (en) * | 2017-07-13 | 2019-11-26 | Bell Textron Inc. | Inboard bearing assemblies having independent shoes |
US10514060B2 (en) | 2017-07-13 | 2019-12-24 | Textron Innovations Inc. | Inboard bearing assemblies with anti-rotation features |
US10494091B2 (en) * | 2017-07-13 | 2019-12-03 | Bell Textron Inc. | Hub bolt supported inboard bearing assemblies |
US10507912B2 (en) * | 2017-07-13 | 2019-12-17 | Bell Textron Inc. | Inboard bearing assemblies with improved accessibility |
US10472059B2 (en) * | 2017-07-13 | 2019-11-12 | Bell Textron Inc. | Inboard bearing assemblies for proprotor systems |
US10864985B2 (en) * | 2017-07-25 | 2020-12-15 | Textron Innovations Inc. | Rotorcraft centrifugal force bearing |
US10836476B2 (en) * | 2017-08-01 | 2020-11-17 | Textron Innovations Inc. | Rotorcraft centrifugal force bearing |
US10703460B2 (en) | 2017-12-18 | 2020-07-07 | Bell Helicopter Textron Inc. | Folding spindle and bearing assembly in a folding rotor blade assembly |
US10577079B2 (en) | 2017-12-18 | 2020-03-03 | Bell Helicopter Textron Inc. | Dual blade fold bolts and inboard centrifugal bearing in a folding rotor blade assembly |
US10703469B2 (en) | 2017-12-18 | 2020-07-07 | Bell Helicopter Textron Inc. | Compact folding yoke with flexible yoke arms in a folding rotor blade assembly |
US10640205B2 (en) | 2017-12-18 | 2020-05-05 | Bell Helicopter Textron Inc. | Outboard centrifugal force bearing with inboard blade fold axis in a folding rotor blade assembly |
US10569869B2 (en) | 2017-12-18 | 2020-02-25 | Bell Helicopter Textron Inc. | Compact folding yoke in a folding rotor blade assembly |
US11027834B2 (en) * | 2018-02-22 | 2021-06-08 | Textron Innovations Inc. | Inboard centrifugal force bearing attachment |
US10703461B2 (en) | 2018-04-26 | 2020-07-07 | Bell Helicopter Textron Inc. | Blade fold method and apparatus for a tilt rotor hub |
US10933986B2 (en) | 2018-06-22 | 2021-03-02 | Bell Helicopter Textron Inc. | Blade fold method and apparatus for a tilt rotor hub |
US11299265B2 (en) * | 2019-05-30 | 2022-04-12 | Lockheed Martin Corporation | Rotor blade folding system |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3026942A (en) * | 1959-07-07 | 1962-03-27 | Bell Helicopter Corp | Helicopter rotor system |
US3347320A (en) * | 1966-07-06 | 1967-10-17 | Bell Aerospace Corp | Rotor system |
US3652185A (en) * | 1970-03-13 | 1972-03-28 | Textron Inc | Elastomeric rotor blade mount |
US3926536A (en) * | 1970-10-15 | 1975-12-16 | Westland Aircraft Ltd | Semi-rigid rotor systems for rotary wing aircraft |
US4012169A (en) * | 1973-05-10 | 1977-03-15 | Societe Nationale Industrielle Aerospatiale | Rotor for rotating wing type aircraft |
GB1432117A (en) * | 1973-05-10 | 1976-04-14 | Aerospatiale | Rotor for rotating wing type aircraft |
US3942910A (en) * | 1974-05-13 | 1976-03-09 | Textron, Inc. | Grip-yoke assembly with a redundant centrifugal load support |
US4028002A (en) * | 1976-03-01 | 1977-06-07 | Lord Corporation | Rotor blade retention system |
GB1535391A (en) * | 1976-05-11 | 1978-12-13 | Westland Aircraft Ltd | Helicopter rotors |
GB1534404A (en) * | 1976-07-15 | 1978-12-06 | Westland Aircraft Ltd | Helicopter rotors |
GB1539200A (en) * | 1976-12-08 | 1979-01-31 | Westland Aircraft Ltd | Helicopter rotors |
US4135856A (en) * | 1977-02-03 | 1979-01-23 | Lord Corporation | Rotor blade retention system |
-
1978
- 1978-09-11 US US05/941,255 patent/US4257739A/en not_active Expired - Lifetime
-
1979
- 1979-08-20 GB GB7928920A patent/GB2030099B/en not_active Expired
- 1979-08-22 CA CA334,233A patent/CA1102772A/en not_active Expired
- 1979-09-03 BR BR7905658A patent/BR7905658A/pt not_active IP Right Cessation
- 1979-09-04 AU AU50541/79A patent/AU528307B2/en not_active Ceased
- 1979-09-04 FR FR7922086A patent/FR2435390A1/fr active Granted
- 1979-09-07 DE DE19792936163 patent/DE2936163A1/de active Granted
- 1979-09-10 AR AR278007A patent/AR222664A1/es active
- 1979-09-10 ES ES484030A patent/ES484030A1/es not_active Expired
- 1979-09-10 IT IT50224/79A patent/IT1162418B/it active
- 1979-09-10 IL IL58218A patent/IL58218A/xx not_active IP Right Cessation
- 1979-09-11 JP JP11580579A patent/JPS5555098A/ja active Granted
- 1979-09-11 MX MX798373U patent/MX6954E/es unknown
Also Published As
Publication number | Publication date |
---|---|
US4257739A (en) | 1981-03-24 |
IT7950224A0 (it) | 1979-09-10 |
GB2030099A (en) | 1980-04-02 |
JPS5555098A (en) | 1980-04-22 |
AU528307B2 (en) | 1983-04-21 |
IL58218A (en) | 1983-05-15 |
AU5054179A (en) | 1980-03-20 |
ES484030A1 (es) | 1980-04-01 |
FR2435390B1 (it) | 1983-11-18 |
DE2936163A1 (de) | 1980-03-27 |
DE2936163C2 (it) | 1988-12-29 |
BR7905658A (pt) | 1980-05-20 |
IL58218A0 (en) | 1980-05-30 |
AR222664A1 (es) | 1981-06-15 |
GB2030099B (en) | 1982-07-14 |
MX6954E (es) | 1986-12-29 |
FR2435390A1 (fr) | 1980-04-04 |
JPH0138720B2 (it) | 1989-08-16 |
CA1102772A (en) | 1981-06-09 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19960926 |