Patents by Inventor Dennis Borowy

Dennis Borowy 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).

  • Safety circuit for a blow forward contact start plasma arc torch
    Patent number: 5900169
    Abstract: A safety circuit is utilized in a blow forward contact start plasma arc torch to extinguish the current to the torch upon determination of an unsafe operating condition. The torch includes a torch body, an electrode and a translatable conductive nozzle biased into contact with the electrode. The safety circuit receives a reference signal a signal indicative of the arc voltage and a mode status signal. The torch current is extinguished when the signal indicative of the arc voltage is less than the reference signal and the mode status signal indicates the torch is operating in the transferred arc mode.
    Type: Grant
    Filed: June 6, 1997
    Date of Patent: May 4, 1999
    Assignee: Hypertherm, Inc.
    Inventors: Dennis Borowy, Jon Lindsay