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| Number | Title | Issue Date |
| 7816875 | High torque gearless actuation at low speeds for swing gate, roll-up gate, slide gate, and vehicular barrier operators The invention is a system for gearless operation of a movable barrier utilizing Lorentz forces, and in particular, a movable barrier operator retrofitted with a gearless motor capable of high torque at very low speeds. Eliminating a gear system in accordance with th... | 10/19/2010 |
| 7272479 | Electrically operated power steering controller and adjusting method of driving electric current offset in this controller The invention proposes an electrically operated power steering controller for inputting a driving electric current offset value of higher accuracy and being able to make an offset correction of a driving electric current by using this driving electric current offset... | 09/18/2007 |
| 7064509 | Apparatus for DC motor position detection with capacitive ripple current extraction An apparatus for determining angular positions of DC motor includes a capacitor connected in parallel with the DC motor. The current flowing through the capacitor, at any given time, is an AC ripple current responsive to a commutation event of the DC motor. The capa... | 06/20/2006 |
| 5731645 | Integrated motor/generator/flywheel utilizing a solid steel rotor A flywheel energy conversion device provides highly efficient conversion between kinetic and electrical energy. The flywheel produces increased output by providing armature coils in an air gap formed about the flywheel (both radial and axial embodiments a... | 03/24/1998 |
