Patents Represented by Attorney E. Phillip Koltos

Find this attorney in the Justia Lawyer Directory

  • Concave drag bit cutter device and method
    Patent number: 5078219
    Abstract: A concave drag bit cutter device and cutting method using such a concave cutter bit are provided which provide substantially increased efficiencies over conventional point attack bits. A number of different cutter bit shapes employing a concave cutting face can be used. The cutter bits are intended to replace the conventional point attack cutter bits and can be used in continuous mining machines, saw blades, auger drills, longwall shearers and the like, in cutting and mining operations.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: January 7, 1992
    Assignee: The United States of America as represented by the Secretary of the Interior
    Inventors: Roger J. Morrell, David A. Larson
  • Silicone fluid useful as a brake fluid
    Patent number: 4005023
    Abstract: There is provided by the present invention, a silicone fluid useful as a hydraulic fluid and more particularly useful as a brake fluid for vehicles.This silicone fluid comprises generally a linear diorganopolysiloxane having a viscosity at 25.degree.C of 20 to 500 centistokes in combination with carboxylic acid anhydrides as water tolerance additives. Various materials and additives can be added to such a silicone fluid so as to improve its properties as a hydraulic fluid.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: January 25, 1977
    Assignee: General Electric Company
    Inventors: Edgar D. Brown, Jr., Frank J. Traver