Patent ID: 7909579

Claim:
A rotor head adapted to be mounted on a drive shaft and adapted to be coupled to a pair of rotor blades, said rotor head comprising: a hub having a pair of tubular end portions that extend along a tube axis and that are opposite to each other along the tube axis, each of said tubular end portions having an end face and being formed with a socket that extends inwardly from said end face along the tube axis and that has an inner socket section and an outer socket section disposed between said inner socket section and said end face; and a pair of joint members, each adapted to connect a respective one of the rotor blades to said socket of a respective of said tubular end portions and each including a link having a hub coupling segment retained rotatably in said inner socket section of said socket of the respective one of said tubular end portions and pivotable about a pivot axis transverse to the tube axis, an intermediate segment extending from said hub coupling segment and disposed movably in said outer socket section of said socket of the respective one of said tubular end portions, and a blade coupling segment extending from said intermediate segment, extending outwardly of said outer socket section of said socket of the respective one of said tubular end portions, and adapted to be coupled to the respective one of the rotor blades, and a vibration absorbing component mounted on said intermediate segment of said link and disposed in said outer socket section of said socket of the respective one of said tubular end portions.