Actuator latch apparatus for hard disk drive

An actuator latch apparatus of a hard disk drive for selectively preventing an actuator installed on a base from pivoting, the actuator latch apparatus comprising:

• a latch lever that:
• engages the actuator in a first latch lever position;
• is induced to move from the first latch lever position to a second latch lever position by a fluid pressure differential;
• and
• returns to the first latch lever position in the absence of the fluid pressure differential.

A hard disk drive having a hard disk and an actuator, wherein the actuator has a locking protrusion, is pivotably installed on a base, and is elastically biased to a parked position, comprising:

• an actuator latch with a hook portion wherein:
• the actuator latch is elastically biased to a latch locked position;
• the hook portion of the actuator latch engages the locking protrusion when the actuator latch is in the latch locked position and the actuator is in the parked position;
• and
• a force is induced on the actuator latch in response to rotation of the hard disk and the induced force unlocks the actuator.

A hard disk drive having a hard disk, an actuator, a first member, a latch lever, and a second member, wherein:

• when no power is supplied to the hard disk drive:
• the first member biases the actuator to a parking zone;
• the second member biases the latch lever to a locked position that engages the actuator;
• and
• when power is supplied to the hard disk drive:
• a force is induced on the latch lever that overcomes the latch lever bias and disengages the actuator.