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| Number | Title | Issue Date |
| 7011504 | Fan, fan guard and related method An assembly includes a fan housing that includes a casing and a stator disposed radially inward of the casing and adapted to receive a rotor assembly. Struts attach the stator to the casing. One or more of the struts may define a channel for routing one or more elec... | 03/14/2006 |
| 6650072 | Apparatus and method of regulating the speed of a brushless DC motor A control circuit is provided for regulating the rotational speed of a brushless DC motor by pulse width modulating at least one power transistor to pass a motor supply signal to the motor armature. A voltage averaging circuit generates an averaged signal... | 11/18/2003 |
| 6485260 | Fan assembly and method of making same A fan assembly has a fan housing defining mounting apertures, a sheet metal mounting member for mounting the fan housing thereon, mounting tabs extending outwardly of the mounting member and received within the mounting apertures of the fan housing, and t... | 11/26/2002 |
| 6285146 | Apparatus and method of regulating the speed of a brushless DC motor A control circuit is provided for regulating the rotational speed of a brushless DC motor by pulse width modulating at least one power transistor to pass a motor supply signal to the motor armature. A voltage averaging circuit generates an averaged signal... | 09/04/2001 |
| 6239991 | Control circuit compensating for malfunction of pulse width modulation circuitry A control circuit for a pulse width modulation (PWM) driven electric motor is provided for operating a fan or motor at a full duty cycle in the event that the PWM input signal should malfunction or fail. The control circuit includes a pulse width modulati... | 05/29/2001 |
| 6222437 | Surface mounted magnetic components having sheet material windings and a power supply including such components A blank formed from electrically conductive sheet material defines a continuous conductive path which includes two terminal ends and at least three loops disposed along the path. The blank is foldable at preselected folding locations on the path to positi... | 04/24/2001 |
| 6208528 | Power supply with surface mounted magnetic components having sheet material windings A blank formed from electrically conductive sheet material defines a continuous conductive path which includes two terminal ends and at least three loops disposed along the path. The blank is foldable at preselected folding locations on the path to positi... | 03/27/2001 |
| 6188187 | Apparatus and method of regulating the speed of a DC brushless motor A control circuit for regulating the rotational speed of a DC brushless motor includes an electrical conduction switch having an input, an output and a control terminal for passing a motor supply signal to a DC brushless motor. A voltage averaging circuit... | 02/13/2001 |
| 5982066 | Electric motor The invention provides a motor and a bearing support and motor housing assembly, wherein the bearing support is detachably mounted to the housing with a flexible fastener, such as a snap ring. A resilient member, such as a spring washer, is seated between... | 11/09/1999 |
| 5565837 | Low profile printed circuit board In a low-profile printed circuit device, a first substrate is provided with a planar magnetic transformer and a planar magnetic inductor. The transformer and the inductor each have a primary winding defining spiral conductive patterns disposed on opposite... | 10/15/1996 |
