Helicopter rotors
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 27, 1981
Grant Date -
N/A
app pub date -
May 9, 1979
filing date -
May 17, 1978
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A helicopter rotor includes a rotor head arranged to support a plurality of rotor blades for rotation about an axis. The rotor head comprises a generally hollow structure, and each rotor blade is supported by an elastomeric bearing arranged to permit blade flap, lead/lag and feathering movements. A resilient support means is housed within the structure and is operatively associated with each rotor blade so as to provide controlled restraint of rotor blade movements in the blade flap plane. In the illustrated embodiment, the support means comprises interconnected inner and outer elastomeric assemblies, the outer assembly being connected to each rotor blade through a common elastomeric lead/lag damper unit which provides inter-blade damping of blade lead/lag movements. The outer elastomeric assembly also provides an automatic blade droop stop.
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