Back to results
US 12,592,252 B2Granted
Hard disk drives with piezoelectric ultrasonic motor
AssigneeSeagate Technology LLC
InventorsYichao Ma, Xiong Liu, Barish Chakravarty
Life of this patent
Estimating the term…
Abstract
An apparatus includes a linear actuator assembly with a rail, a carriage, and a piezoelectric actuator. The carriage is coupled to the rail such that the carriage is movable with respect to the rail, and the piezoelectric actuator is configured and arranged to cause the carriage to move linearly between ends of the rail.
Claims19
An apparatus comprising:
- a linear actuator assembly comprising a rail, a carriage, and a piezoelectric actuator,
- wherein the carriage is coupled to the rail such that the carriage is movable with respect to the rail,
- wherein the piezoelectric actuator is configured and arranged to cause the carriage to move linearly between ends of the rail,
- wherein the piezoelectric actuator is positioned between a pair of arms, wherein the piezoelectric actuator is indirectly coupled to the pair of arms via a first preloaded spring structure.
1 more element
A hard disk drive comprising:
- a magnetic recording medium;
- a first magnetic sensor;
- and
- a first actuator assembly configured to linearly move the first magnetic sensor to different positions with respect to the magnetic recording medium, the first actuator assembly comprises:
- a first linear bearing with a first movable portion and a first stationary portion, and
- a first piezoelectric actuator configured to move the first movable portion to cause movement of the first magnetic sensor, wherein the piezoelectric actuator is positioned between a pair of arms, wherein the piezoelectric actuator is indirectly coupled to the pair of arms via a first preloaded spring structure.
3 more elements
A hard disk drive comprising:
- a magnetic recording medium;
- a magnetic sensor;
- an actuator assembly configured to linearly move the magnetic sensor to different positions with respect to the magnetic recording medium, wherein the actuator assembly comprises:
- a linear bearing with a movable portion and a stationary portion, and
- a piezoelectric actuator configured to move the movable portion to cause movement of the magnetic sensor;
- and
- a controller configured to cause voltages to be applied to the piezoelectric actuator to deform the piezoelectric actuator such that two sides of the piezoelectric actuator form a concave shape and another two sides of the piezoelectric actuator form a convex shape.
4 more elements
Dependencies are inferred from the claim text.