Patent ID: 7745966
Filing Date: 2010-06-29
Classification: H02K

Abstract:
1. A motor apparatus, comprising: a rotor assembly including a rotor shaft, the rotor assembly being configured to be rotatable about an axial direction, the rotor assembly being also adapted to be movable between a first position and a second position along the axial direction, the first and second positions being characterized by a first frictional braking force and a second frictional braking force, respectively; a motor pinion coupled to the rotor assembly via the rotor shaft; a thrust pin, the thrust pin being configured to be in contact with the rotor shaft when the rotor assembly is in the first position; a bearing retainer, configured to support the rotor shaft during rotation, the bearing retainer being configured to be in contact with the motor pinion when the rotor assembly is in the second position; and a plurality of fan blades coupled to the rotor assembly, the fan blades being configured to generate a first force that pushes the rotor assembly to the first position when the rotor assembly rotates in a first direction, the fan blades being further configured to generate a second force that pushes the rotor assembly to the second position during a portion of time when the rotor assembly rotates in a second direction opposite of the first direction.