IT1162418B - Perfezionamento nei rotori di elicotteri - Google Patents

Perfezionamento nei rotori di elicotteri

Info

Publication number: IT1162418B
Authority: IT; Italy
Prior art keywords: improvement; helicopter rotors; helicopter; rotors
Prior art date: 1978-09-11

Application number

IT50224/79A

Other languages

English (en)

Other versions

IT7950224A0 (it

Inventor

Cecil Edward Covington

David Edward Snyder

Walter Gerd Oskar Sonneborn

Wesley Louis Cresap

Original Assignee

Textron Inc

Priority date (The priority date 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 date listed.)

1978-09-11

Filing date

1979-09-10

Publication date

1987-04-01

Family has litigation

First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25476184&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=IT1162418(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.

1979-09-10 Application filed by Textron Inc filed Critical Textron Inc

1979-09-10 Publication of IT7950224A0 publication Critical patent/IT7950224A0/it

1987-04-01 Application granted granted Critical

1987-04-01 Publication of IT1162418B publication Critical patent/IT1162418B/it

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)
Turbine Rotor Nozzle Sealing (AREA)
Braking Arrangements (AREA)
Vibration Dampers (AREA)

IT50224/79A 1978-09-11 1979-09-10 Perfezionamento nei rotori di elicotteri IT1162418B (it)

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)

* Cited by examiner, † Cited by third party
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
EP2032427B1 (en) *	2006-06-20	2015-08-12	Bell Helicopter Textron Inc.	Centrifugal force bearing with steady pitching moment
CH704541A2 (de) *	2011-02-28	2012-08-31	Marenco Swisshelicopter AG Engineering & Consulting	Rotorblattkopplungsvorrichtung.
CA2838512C (en) *	2011-06-29	2015-09-29	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
US10457388B2 (en)	2016-02-16	2019-10-29	Bell Helicopter Textron, Inc.	Rotor assembly with high lock-number blades
US10472057B2 (en)	2016-02-16	2019-11-12	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
US10486807B2 (en) *	2017-07-13	2019-11-26	Bell Textron Inc.	Inboard bearing assemblies having independent shoes
US10472059B2 (en) *	2017-07-13	2019-11-12	Bell Textron Inc.	Inboard bearing assemblies for proprotor systems
US10514060B2 (en)	2017-07-13	2019-12-24	Textron Innovations Inc.	Inboard bearing assemblies with anti-rotation features
US10507912B2 (en) *	2017-07-13	2019-12-17	Bell Textron Inc.	Inboard bearing assemblies with improved accessibility
US10479497B2 (en) *	2017-07-13	2019-11-19	Bell Textron Inc.	Inboard bearing assemblies having load transfer shoe bolts
US10494091B2 (en) *	2017-07-13	2019-12-03	Bell Textron Inc.	Hub bolt supported inboard bearing assemblies
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
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
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
US10569869B2 (en)	2017-12-18	2020-02-25	Bell Helicopter Textron Inc.	Compact folding yoke in a folding rotor blade assembly
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
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)

* Cited by examiner, † Cited by third party
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
GB1432117A (en) *	1973-05-10	1976-04-14	Aerospatiale	Rotor for rotating wing type aircraft
US4012169A (en) *	1973-05-10	1977-03-15	Societe Nationale Industrielle 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 FR FR7922086A patent/FR2435390A1/fr active Granted
- 1979-09-04 AU AU50541/79A patent/AU528307B2/en not_active Ceased
- 1979-09-07 DE DE19792936163 patent/DE2936163A1/de active Granted
- 1979-09-10 IT IT50224/79A patent/IT1162418B/it active
- 1979-09-10 IL IL58218A patent/IL58218A/xx not_active IP Right Cessation
- 1979-09-10 AR AR278007A patent/AR222664A1/es active
- 1979-09-10 ES ES484030A patent/ES484030A1/es not_active Expired
- 1979-09-11 MX MX798373U patent/MX6954E/es unknown
- 1979-09-11 JP JP11580579A patent/JPS5555098A/ja active Granted

Also Published As

Publication number	Publication date
IT7950224A0 (it)	1979-09-10
IL58218A (en)	1983-05-15
AU528307B2 (en)	1983-04-21
FR2435390A1 (fr)	1980-04-04
US4257739A (en)	1981-03-24
DE2936163C2 (it)	1988-12-29
ES484030A1 (es)	1980-04-01
JPH0138720B2 (it)	1989-08-16
AU5054179A (en)	1980-03-20
BR7905658A (pt)	1980-05-20
CA1102772A (en)	1981-06-09
FR2435390B1 (it)	1983-11-18
GB2030099B (en)	1982-07-14
IL58218A0 (en)	1980-05-30
DE2936163A1 (de)	1980-03-27
AR222664A1 (es)	1981-06-15
GB2030099A (en)	1980-04-02
JPS5555098A (en)	1980-04-22
MX6954E (es)	1986-12-29

Publication	Publication Date	Title
IT1162418B (it)	1987-04-01	Perfezionamento nei rotori di elicotteri
IT1113252B (it)	1986-01-20	Perfezionamento nei rotori di elicotteri
IT1116845B (it)	1986-02-10	Perfezionamento nei dispositivi elettrocromici
IT1116810B (it)	1986-02-10	Perfezionamento nei dentifrici
BR7903781A (pt)	1980-02-12	Rotor de helicoptero
IT1102574B (it)	1985-10-07	Perfezionamento nei depuratori centrifughi
IT1111057B (it)	1986-01-13	Perfezionamento nei generatori di radionuclidi
IT1116866B (it)	1986-02-10	Perfezionamento nei corredi di lavodo
IT7948301A0 (it)	1979-03-12	Perfezionamento nei trasportatori arulli
NO145979C (no)	1982-07-07	Helikopter
DE2924450A1 (de)	1980-01-10	Hubschrauberrotor
IT1156773B (it)	1987-02-04	Perfezionamento nei giroscopi in particolare nei rotori per i medesimi
IT1158181B (it)	1987-02-18	Perfezionamento nei dispositivi di sollevamento
BR7908341A (pt)	1980-07-22	Helicoptero
IT1116470B (it)	1986-02-10	Perfezionamento nei detonatori elettrici di sicurezza
IT8047522A0 (it)	1980-01-04	Perfezionamento nei dispositivi di gioco
IT7947511A0 (it)	1979-01-02	Perfezionamento nei giroscopi lasera quattro frequenze
IT1126831B (it)	1986-05-21	Perfezionamento nei rotori di elicotteri
IT7950073A0 (it)	1979-08-21	Perfezionamento nei sonar
IT1114728B (it)	1986-01-27	Perfezionamento nei motori sincroni
IT8148024A0 (it)	1981-03-13	Perfezionamento nei rotori di codadi elicotteri
IT7850673A0 (it)	1978-08-09	Perfezionamento nei mezzi di rotore di elicotteri
IT7947872A0 (it)	1979-02-02	Perfezionamento nei tramezzi antincendio
IT1114080B (it)	1986-01-27	Perfezionamento nei tramezzi antincendio
IT1158159B (it)	1987-02-18	Perfezionamento nei rotori di elicotteri

Legal Events

Date	Code	Title	Description
1999-10-27	TA	Fee payment date (situation as of event date), data collected since 19931001	Effective date: 19960926