Patent ID: 9270144
Filing Date: 2016-02-23
CPC Classification: H02K

Claim Text:
1. A limited rotation rotary actuator comprising: a stator having an aperture extending axially therein and at least two teeth having contoured ends forming at least a portion of the aperture, wherein distal ends of the at least two teeth form a gap therebetween; a rotor having a two-pole diametral magnet bidirectionally operable within the aperture, wherein a separation is formed between the magnet and the contoured ends of the at least two teeth; at least one first slot extending longitudinally within at least one tooth of the at least two teeth; at least one second slot extending from the aperture to within the stator, the at least one second slot generally aligned orthogonally to the at least one first slot, wherein the at least one second slot includes a finger of stator material extending therein toward the aperture to form a bifurcated second slot; at least one electrical coil extending within the at least one second slot, wherein the at least one electrical coil is divided by the finger and, wherein the electrical coil is excitable for providing bidirectional torque to the rotor; and rotor restoring means within at least a single first slot of the at least one first slot, wherein the rotor restoring means is positioned for restoring the rotor to a central rotation angle when current is withheld to the at least one electrical coil.