Patents by Inventor David J. Baessler

David J. Baessler 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: 5647627
    Abstract: The present invention relates to a pipe puller which grips the inner bore of the pipe to be installed. A tapered, threaded, expandable gripping member is inserted into the bore of the pipe. The gripping member is turned clockwise which then expands the gripping member so that the gripping member is placed in contact with the inner surface of the pipe. A hollow cylinder is also placed over the pipe and gripping member to protect the end of the pipe as it is pulled through the ground. The pipe puller is pulled through the ground by a motive device attached to the end of the pipe puller shaft.
    Type: Grant
    Filed: November 9, 1995
    Date of Patent: July 15, 1997
    Inventor: David J. Baessler