Bifilar vibration dampers

Details Bifilar vibration dampers Bifilar vibration dampers

1974-09-20

1976-01-13

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

Self-shifting or selectively adjustable mass

416500, 74574, B64C 2732

Patent

active

039320600

ABSTRACT:
This invention relates to improvements in bifilar vibration dampers, and particularly to such dampers for use in absorbing vibrations in a helicopter main rotor system.
The improved bifilar construction prevents detrimental inertia forces affecting the tuning of the damper and also prevents the ingress of dirt and dust into the moving parts.

REFERENCES:
patent: 3540809 (1970-11-01), Paul et al.
patent: 3874818 (1975-04-01), Saunders et al.

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