Patent ID: 8780504

Claim:
A disk drive comprising: a disk drive base; a spindle attached to the disk drive base; a disk mounted on the spindle; a first actuator pivotally attached to the disk drive base, the first actuator including a conductive coil and an actuator arm; and a head suspension assembly comprising a mounting plate attached to the actuator arm; a load beam attached to and extending from the mounting plate in a longitudinal direction, the load beam defining a load beam plane parallel to the mounting plate; a first piezoelectric element disposed within a first piezoelectric element receiving window in the mounting plate; and a second piezoelectric element disposed within a second piezoelectric element receiving window in the mounting plate; wherein the load beam includes a plurality of rails that includes first and second outer rails and first and second inner rails, each of the plurality of rails being oriented in the longitudinal direction and being formed out of the load beam plane by an angle in the range of 45 degrees to 90 degrees relative to the load beam plane; wherein the first and second inner rails are disposed between the first and second piezoelectric elements, and the first and second outer rails are disposed not between the first and second piezoelectric elements; and wherein the first piezoelectric element is disposed between the first outer rail and the first inner rail, and the second piezoelectric element is disposed between the second inner rail and the second outer rail; and a read head supported by the load beam and disposed adjacent a surface of the disk.