Patents by Inventor Edward J. McGrady

Edward J. McGrady 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).

  • Method for producing an extruder barrel assembly
    Patent number: 5221821
    Abstract: A method of manufacturing an extruder barrel is disclosed which fabricates a barrel in two longitudinal sections and joins the sections together by electron beam welding. In a preferred form, the barrel sections are formed by machining conical recesses longitudinally in each section whereby a complementary bore is defined by the assembled barrel sections. The machined recesses may be formed with spiral, longitudinal or radial grooves. The recesses may be a uniform conical shape, stepped conical or a dual tapered shape.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: June 22, 1993
    Assignee: Crompton & Knowles Corporation
    Inventors: Michael T. Burns, Albert P. Brown, William A. Kramer, Edward J. McGrady