Patent ID: 8963396
Filing Date: 2015-02-24
Classification: H02K,Y10T

Abstract:
1. An electromechanical device operable as a limited rotation rotary actuator having a generally linear torque versus angle profile, the device comprising: a stator having an aperture extending axially therein, wherein the stator includes two teeth extending toward the aperture, the stator including multiple stator sections with a first stator section having a first tooth and a second stator section having a second tooth, wherein each tooth includes an elongate slot extending longitudinally through a free end of the tooth, wherein the aperture has an oval shape having a long axis aligned with a longitudinal axis of the opposing two teeth, and wherein the first stator section is integrally formed with the second stator section; an electrical coil extending around at least one tooth, wherein the electrical coil has a width dimension, wherein the slot extends along the longitudinal axis of the tooth throughout the width dimension of the coil, and wherein the electrical coil is excitable for magnetizing the at least one tooth; and a rotor having a shaft and a cylindrical, solid diametral magnetized magnet operable therewith extending into the aperture, wherein an uneven gap is formed between the magnet and free ends of the teeth sufficient for providing a generally linear angle versus current profile characteristic during operation of the device and a spring-like return-to-center action for the rotor when not exciting the electrical coil.