Patents by Inventor Robert John Hopkins

Robert John Hopkins 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).

  • Publication number: 20110164922
    Abstract: A roadway marker is formed from a forged longitudinally extending unitary body having an upper surface and a bottom surface from which extent two rooting members in a direction away from the bottom surface, the upper surface of the elongated body respectively define inclined ramps each extending from a respective end of the longitudinally extending body to a centrally elevated bridging area, the ramps defining recesses in which is mounted reflective media. The rooting pins are secured in holes drilled at an acute angle in the pavement such that when the rooting pins are mounted into the holes drilled in the pavement after an adhesive has been placed in the holes, resilient clips mounted on the rooting pins create an interference fit with the wall of each of the two drilled holes to secure the roadway marker to the pavement.
    Type: Application
    Filed: January 5, 2010
    Publication date: July 7, 2011
    Inventors: David Michael Moxlow, Chester Ellsworth Dietrick, III, Michael Anthony Colechio, Robert John Hopkins
  • Patent number: 4092571
    Abstract: A power match system for a train of individually powered traction vehicles in which two distinct types of power control systems are employed. The system includes a programmed power matched circuit which has programmed therein the volt-ampere characteristics of a motor operating under the control of one of the types of power control systems, such as a cam controlled resistor system. The power match circuit is serially inserted in the current command system for the other type of power control, such as a chopper controlled power system. A signal representative of the motor CEMF in the chopper system is supplied to the power match circuit which then regulates the current supplied by the chopper control power system in accordance with the programmed characteristics of the cam controlled resistor system. In this manner the motive power developed by the two distinct types of power control systems is matched whereby each type of system provides substantially the same pulling power to the train.
    Type: Grant
    Filed: November 9, 1976
    Date of Patent: May 30, 1978
    Assignee: General Electric Company
    Inventors: Robert John Hopkins, Thomas Detlor Stitt, Hillert Vitt