Center of percussion head actuator assembly
 An improved rotary-type read-write head actuator assembly for use in a rotating disc data storage device is provided. The head actuator assembly includes an elongated actuator arm pivotally mounted at one end and having flexible read-write head support arms at the other end. The elongated actuator arm includes a coil internally mounted within an open cavity at the center of percussion of the actuator arm. The portion of the actuator arm supporting the coil moves within a magnetic field to form a voice coil motor to drive the actuator arm. 
Hewlett-Packard Company
H G G
H02K G11B G11B
inventional inventional inventional
James C.
Anderson