Patents by Inventor Thomas A. Herrington

Thomas A. Herrington 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: 6320759
    Abstract: A plastic, one-piece adapter for a printed circuit board (PCB) holds the PCB within a recessed area by means of a series of fixed, overhanging tabs and a series of snap latches, all of which are integrally molded as part of the one-piece adapter.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: November 20, 2001
    Assignee: ADC DSL Systems, Inc.
    Inventors: Robert D. Tusan, Thomas A. Herrington, Jerry Arreola
  • Patent number: 5628296
    Abstract: A solenoid exhaust gas recirculation (EGR) valve (12) includes a first inductive coil (48) that generates a magnetic field when energized by a signal from a control unit (13). The magnetic field drives a ferromagnetic armature valve (64) open and closed--metering the flow of recovered exhaust gases from an engine exhaust manifold (14) to an engine air intake manifold (16). The exhaust gas flow rate depends upon the amount of current flowing through the first coil (48). The resistance of the first coil (48) is temperature-dependent. Therefore, to reduce changes in coil current and magnetic field strength due to temperature changes, the first coil (48) is connected in series with a thermistor (75) having a temperature coefficient of resistance that is opposite that of the first coil (48). A temperature stable resistor in the form of a second coil (72) is connected across the thermistor (75) to modify the thermistor temperature-response curve to more closely offset that of the first coil (48).
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: May 13, 1997
    Assignee: Borg-Warner Automotive, Inc.
    Inventors: Thomas Herrington, Michael J. Covey
  • Patent number: 4881974
    Abstract: A silver-glass paste consisting essentially of silver flake, silver oxide, lead borate glass, resin, thixotrope and solvent.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: November 21, 1989
    Assignee: Johnson Matthey, Inc.
    Inventor: Thomas Herrington