Vibration absorber for helicopter
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United States of America Patent
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Sep 30, 1980
Issued Date -
N/A
app pub date -
Nov 6, 1978
filing date -
Nov 6, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A vibration absorber for a helicopter rotor includes a hub portion, a mass portion encircling the hub portion and a plurality of resilient arms extending in a spaced-apart spiral pattern between the hub and the mass. In operation, the hub portion of the vibration absorber is mounted on a helicopter rotor so as to be rotated with the rotor about an axis of rotation of the rotor, the resilient arms ensuring that the mass is capable of equal resilient deflection in any direction within its plane of rotation whereby the vibration absorber simultaneously reduces in-plane vibration forces of different frequencies.
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