IT1064381B - Ammortizzatore di vibrazioni bifilare per elicotteri - Google Patents

Ammortizzatore di vibrazioni bifilare per elicotteri

Info

Publication number
IT1064381B
IT1064381B IT29283/76A IT2928376A IT1064381B IT 1064381 B IT1064381 B IT 1064381B IT 29283/76 A IT29283/76 A IT 29283/76A IT 2928376 A IT2928376 A IT 2928376A IT 1064381 B IT1064381 B IT 1064381B
Authority
IT
Italy
Prior art keywords
helicopters
shock absorber
vibration shock
wire vibration
wire
Prior art date
Application number
IT29283/76A
Other languages
English (en)
Original Assignee
United Technologies Corp
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.)
Filing date
Publication date
Application filed by United Technologies Corp filed Critical United Technologies Corp
Application granted granted Critical
Publication of IT1064381B publication Critical patent/IT1064381B/it

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64C—AEROPLANES; HELICOPTERS
    • B64C27/00—Rotorcraft; Rotors peculiar thereto
    • B64C27/001—Vibration damping devices
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S416/00—Fluid reaction surfaces, i.e. impellers
    • Y10S416/50—Vibration damping features

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Mechanical Operated Clutches (AREA)
IT29283/76A 1975-11-13 1976-11-12 Ammortizzatore di vibrazioni bifilare per elicotteri IT1064381B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US05/631,577 US3988074A (en) 1975-11-13 1975-11-13 Anhedral bifilar

Publications (1)

Publication Number Publication Date
IT1064381B true IT1064381B (it) 1985-02-18

Family

ID=24531814

Family Applications (1)

Application Number Title Priority Date Filing Date
IT29283/76A IT1064381B (it) 1975-11-13 1976-11-12 Ammortizzatore di vibrazioni bifilare per elicotteri

Country Status (11)

Country Link
US (1) US3988074A (it)
JP (1) JPS5925719B2 (it)
BR (1) BR7607361A (it)
CA (1) CA1064455A (it)
CH (1) CH605251A5 (it)
DE (1) DE2645981C2 (it)
FR (1) FR2331480A1 (it)
GB (1) GB1522058A (it)
IL (1) IL50684A (it)
IT (1) IT1064381B (it)
NL (1) NL7611833A (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4057363A (en) * 1975-11-20 1977-11-08 United Technologies Corporation Extended arm bifilar and method to eliminate second order vibration excitation
FR2733483B1 (fr) * 1995-04-27 1997-07-04 Eurocopter France Dispositif d'attenuation de vibrations pour rotor d'helicoptere
DE19961071B4 (de) * 1999-12-17 2007-04-12 Eurocopter Deutschland Gmbh Kupplungsmembran
GB2482545B (en) * 2010-08-06 2017-05-03 Ge Aviat Systems Ltd Aircraft propellers with composite blades mounted to a single propeller hub

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2519762A (en) * 1945-07-09 1950-08-22 United Aircraft Corp Gyrodynamic damper
US3372758A (en) * 1967-02-15 1968-03-12 United Aircraft Corp Vibration absorber
US3540809A (en) * 1968-09-20 1970-11-17 United Aircraft Corp Vibration damped helicopter rotor
GB1443148A (en) * 1972-10-19 1976-07-21 Westland Aircraft Ltd Bifilar vibration dampers
GB1445686A (en) * 1972-11-06 1976-08-11 Westland Aircraft Ltd Vibration absorbing systems
GB1465266A (en) * 1973-04-26 1977-02-23 Westland Aircraft Ltd Rotors for rotary wing aircraft
GB1468359A (en) * 1973-10-09 1977-03-23 Westland Aircraft Ltd Bifilar vibration dampers

Also Published As

Publication number Publication date
GB1522058A (en) 1978-08-23
DE2645981A1 (de) 1977-05-26
CH605251A5 (it) 1978-09-29
BR7607361A (pt) 1977-09-20
FR2331480B1 (it) 1981-05-29
IL50684A0 (en) 1976-12-31
FR2331480A1 (fr) 1977-06-10
NL7611833A (nl) 1977-05-17
DE2645981C2 (de) 1986-02-06
JPS5925719B2 (ja) 1984-06-20
CA1064455A (en) 1979-10-16
IL50684A (en) 1980-12-31
US3988074A (en) 1976-10-26
JPS5262897A (en) 1977-05-24

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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: 19951031