Patent ID: 7053507

Claim:
A linear oscillating actuator system comprising: a housing; an oscillator configured to include an oscillator permanent magnet as well as an output shaft which is adapted to be connected to drive a load; and, a stator assembly incorporated in said housing, said stator assembly being configured to movably support said oscillator and to carry an electromagnet, said electromagnet generating a magnetic field which interacts with said oscillator permanent magnet to reciprocate said oscillator relative to said stator assembly in a linear path, wherein a balancer is supported to said stator assembly, said balancer being configured to include a balancer permanent magnet which interacts with said magnetic fields for reciprocating said balancer along said linear path in an opposite phase relation with said oscillator, said balancer being configured to have a mass generally equal to that of said oscillator and being configured to have no output shaft or connection with the load.