Patent ID: 6464572
Filing Date: 2002-10-15
Classification: B24B,B25F,F16F

Abstract:
A portable power tool with an anti-vibration balancing device, comprising:a housing, a rotation motor, an output shaft journalled in the housing, and having a rear end and a forward end, a working implement mounting device provided at the forward end of the output shaft, a forward balancing unit also provided at the forward end of the output shaft, a power transmission coupling the motor to the output shaft, an auxiliary balancer secured to the rear end of the output shaft for accomplishing a dynamic balancing of the output shaft during operation with an unbalanced working implement attached to the working implement mounting device, wherein the auxiliary balancer and the forward balancing unit each comprise balls, and the balls of the auxiliary balancer have a smaller size than a size of the balls of the forward balancing unit.