Patents by Inventor Kraig W. Bockhorst

Kraig W. Bockhorst has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5923143
    Abstract: A motor starter circuit providing recovery of the energy trapped in the motor windings when the supply voltage and current have opposite polarities by selectively controlling actuation of a plurality of high speed switches. The circuit, for use with a multiphase motor and power source that provides positive and negative voltage alternations which result in the generation of a load current in the motor having positive and negative alternations, includes a plurality of switch-diode combinations electrically configured such that for a given pair of supply voltage/load current polarities, only one diode of each combination may be forward biased.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: July 13, 1999
    Assignee: York International Corporation
    Inventors: Muhammet Cosan, Kraig W. Bockhorst, Harold R. Schnetzka