Vibration absorber for helicopter

Details Vibration absorber for helicopter Vibration absorber for helicopter

1978-11-06

1980-09-30

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

Self-shifting or selectively adjustable mass

416500, B64C 2706, F16C 1500

Patent

active

042252873

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.

REFERENCES:
patent: 3219120 (1965-11-01), Hooper
patent: 3387505 (1968-06-01), Rumsey
patent: 3910720 (1975-10-01), Vincent et al.
patent: 4044628 (1977-08-01), Jacks
patent: 4145936 (1979-03-01), Vincent et al.

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