Patent ID: 7035053

Claim:
A disk drive comprising: (a) a disk; (b) a spindle motor for rotating the disk (c) an actuator arm assembly comprising: an actuator arm; and a head coupled to a distal end of the actuator arm; and (d) an inertial latch for maintaining the actuator arm assembly in a parked position while the disk drive is powered down, the inertial latch comprising a body having a protruding arm and a pivot surface, wherein: when the actuator arm assembly is in the parked position, the protruding arm is in constant contact with the actuator arm assembly applying a latching force to the actuator arm assembly while the disk drive is not subject to a physical shock; during a physical shock, an inertia of the body biases the body rotationally about the pivot surface in a first direction to increase the latching force applied to the actuator arm assembly by the protruding arm; and the protruding arm comprises a concave surface for engaging a convex surface of the actuator arm assembly while the actuator arm is in the latched position.