Patents by Inventor Thomas Rettich

Thomas Rettich 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: 6621674
    Abstract: What is described here is a power supply unit for plasma systems such as plasma processing or coating devices, wherein electric arcs or disruptive breakdown may occur, which originate from an electrode in particular, comprising a d.c. voltage or direct-current source whose output terminals are connected via an inductive resistor and a power switch to the electrodes of the plasma system, and possibly a circuit for detecting electric arcs or disruptive breakdown, that operates the switch upon occurrence of an electric arc or disruptive breakdown, in such a way that electrical energy producing a plasma will no longer be applied to the electrodes. The invention is characterised by the provisions that the inductive resistor(s) is (are) each connected to a recovery diode and that the switch is a series switch.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: September 16, 2003
    Assignee: Hüttinger Elektronik GmbH & Co. KG
    Inventors: Gerhard Zahringer, Peter Wiedfmuth, Thomas Rettich
  • Patent number: 4370714
    Abstract: A pulse width modulated control signal is applied to inlet and outlet solenoid valves in a closed fluid vehicle brake system. The electronic actuating circuitry can control a fluid brake system in a towed vehicle from a towing vehicle without fluid connections therebetween. The closed fluid brake system provides an electrical feedback signal that tracks an electrical command signal applied by the towing vehicle operator through a manually operated command signal transducer to produce an error signal to maintain a command pressure in the towed vehicle fluid brake system. The inlet and outlet valves are repeatedly opened and closed in accordance with the width of a train of pulses. The pulse width is proportional to the difference between an electrical command signal and an error signal.
    Type: Grant
    Filed: August 25, 1980
    Date of Patent: January 25, 1983
    Assignee: Minnesota Automotive, Inc.
    Inventors: Thomas A. Rettich, Raymond D. Woodworth