Patents by Inventor Michael Welzel

Michael Welzel 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).

  • Spacer tube with guiding indents
    Publication number: 20060182519
    Abstract: A one-piece spacer tube for receiving a fastener includes a tubular wall defining a central bore therebetween and a plurality of guiding indents integrally formed in the wall. The indents are arranged in pairs that are longitudinally spaced along the length of the wall. The guiding indents include guiding surfaces that project radially inwardly into the central bore to guide a fastener extending through the central bore.
    Type: Application
    Filed: February 14, 2005
    Publication date: August 17, 2006
    Applicant: Magna International Inc.
    Inventors: Michael Welzel, Eckhard Schaefer
  • Driving pipe and method for the construction of an essentially horizontal pipeline
    Patent number: 6561732
    Abstract: A driving pipe and method for the construction of an essentially horizontal pipeline, whose wall is made at least primarily of concrete polymer. At least sections of the wall of the concrete polymer pipe are made of a liquid-permeable filter material consisting of polymer-bound, gravel-like particles.
    Type: Grant
    Filed: August 25, 2000
    Date of Patent: May 13, 2003
    Assignee: Meyer Rohr & Schacht GmbH
    Inventors: Thomas D. Bloomfield, Michael Welzel