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US 4,540,340 AGranted
Helicopter rotor
AssigneeCostruzioni Aeronautiche Giovanii Agusta S.p.A.
InventorEmilio Pariani
Life of this patent
Estimating the term…
Abstract
Helicopter rotor on which static balancing of the rotor is provided for by a number of annular-shaped counterweights housed inside each pin securing each blade to the hub; the said counterweights being supported by a rod pressed an clicked inside an axial hole on the relative pin.
Claims3
A helicopter rotor comprising a central hub, at least one blade extending radially outward from said hub, means for connecting said blade to said hub, and means for static balancing said rotor;
- said connecting means comprising a number of pins extending through an inner end portion of said blade, at least one of said pins being hollow and having an axial hole, and said balancing means being housed inside said hollow pin and comprising a rod fitted inside said axial hole, and a variable number of annular counterweights slidably mounted on said rod;
- said counterweights being selected from a number of counterweights of different mass, and first and second clamping means being provided for releasably clamping said counterweights axially on to said rod and said rod inside said hollow pin respectively.
Dependencies are inferred from the claim text.