Vibration absorbers

Details Vibration absorbers Vibration absorbers

1977-01-21

1979-03-27

Powell, Jr., Everette A.

Machine element or mechanism

Elements

Flywheel, motion smoothing-type

416500, F16C 1500

Patent

active

041459369

ABSTRACT:
A vibration absorber includes a hub arranged for rotation during operation about an aixs, a mass encircling the hub and a plurality of resilient arms extending in a spaced-apart spiral pattern between the hub and the mass so that the mass rotates with the hub in a plane of rotation perpendicular to the axis and is capable of equal resilient deflection in any direction within its plane of rotation. In operation the absorber operates as a spring mass device and finds particular application in damping vibrations in a helicopter rotor due to the facility to simultaneously cancel vibration forces of different frequencies.

REFERENCES:
patent: 1357366 (1920-11-01), White
patent: 1854329 (1932-04-01), Carter
patent: 1975118 (1934-10-01), Moodie
patent: 3208303 (1965-09-01), Durouchoux
patent: 3298443 (1967-01-01), Burkam et al.
patent: 3312125 (1967-04-01), Durouchoux
patent: 3387505 (1968-06-01), Rumsey
patent: 3910720 (1975-10-01), Vincent et al.
patent: 3964341 (1976-06-01), Rabenhorst
patent: 3982447 (1976-09-01), Rabenhorst
patent: 3990324 (1976-11-01), Fishbaugh et al.
patent: 4044628 (1977-08-01), Jacks

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