Pendulum for damping or eliminating low excitation frequencies

Details Pendulum for damping or eliminating low excitation frequencies Pendulum for damping or eliminating low excitation frequencies

1983-07-11

1985-07-09

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

045279519

ABSTRACT:
Low excitation frequencies of a structural component, for example of a heopter rotor blade or the like, are damped or eliminated by a pendulum device connected to the component, the excitation frequency or frequencies of which are to be damped or eliminated. In a helicopter rotor blade the pendulum device is preferably connected to the blade neck near the rotor head. The pendulum device has a plurality of pendulum bodies coupled to each other for forming a multiple pendulum in which these pendulum bodies are so tuned relative to each other that the multiple pendulum has several eigenfrequencies.

REFERENCES:
patent: 2137418 (1938-11-01), Shay
patent: 2306959 (1942-12-01), Knibbe
patent: 2313024 (1943-03-01), Salomon
patent: 2317983 (1943-05-01), Fischer
patent: 2353681 (1944-07-01), Martin et al.
patent: 2462961 (1949-03-01), Harker
patent: 2462962 (1949-03-01), Harker
patent: 3887296 (1975-06-01), Mills et al.
patent: 4239455 (1980-12-01), Broekhuizen et al.
patent: 4239456 (1980-12-01), Joglekar et al.

Affiliated with

Also associated with

Rating

Pendulum for damping or eliminating low excitation frequencies does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Pendulum for damping or eliminating low excitation frequencies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Pendulum for damping or eliminating low excitation frequencies will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-907149