Patent ID: 6901798

Claim:
A balancing apparatus for rotating bodies, comprising: means for rotatably supporting a rotating body, at least two balancing rings disposed on said rotating body in axial side by side relationship with each other and coaxial with said rotating body, said rings being each unbalanced and rotatable with said rotating body and further susceptible of assuming different angular positions relative to said rotating body, detecting means for detecting unbalance of said rotating body and for detecting said angular positions of said rings relative to said rotating body, and positioning means operatively connected with, and responsive to, said detecting means for carrying out an angular rotation between said rings and said rotating body to bring said rings to a relative angular position corresponding to a balance state of said rotating body, wherein said positioning means comprises positioning members selectively engageable with said rings in a stopped position of said rotating body, and driving means for selectively causing a relative angular rotation of said rings and said rotating body during mutual engagement of said positioning members and said rings.