Patent ID: 9301822
Filing Date: 2016-04-05
CPC Classification: A61C,F16F

Claim Text:
1. A personal care appliance, comprising: a handle portion; a workpiece assembly; and a non-nodal mounted motor assembly, mounted to the handle portion by a mounting assembly, for non-nodally driving the workpiece assembly in phase with the motor motion of the motor assembly, constituting a primary resonator characterized by a drive frequency and producing in operation vibration otherwise transmitted to the handle portion, said motor assembly comprising a housing; and a secondary resonator separate from the primary resonator comprising a spring mass assembly characterized by a separate resonant frequency from the drive frequency and configured to reduce vibrations from the non-nodal mounted motor assembly to the handle portion when the appliance is operating, the spring mass assembly comprising a spring member connected to the outside of the housing of the non-nodal mounted motor assembly, and a separate mass attached at the end of the spring member.