Patents by Inventor Sam Abrams

Sam Abrams 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: 5439320
    Abstract: The invention discloses a system for splitting and spreading existing underground pipe and pipe fittings. A plurality of cutter wheels are positioned within a cutter assembly frame. A first cutter wheel cuts the pipe and scores the pipe fittings. A second cutter wheel rides in the path cut in the pipe by the first cutter wheel and cuts the pipe fittings. A plurality of paired pipe expanders are formed on the outer periphery of the cutter assembly frame. Pipe expanders contact the inner surface of the pipe wall and keep the cross section of the pipe circular while the cutter wheels cut through the pipe and pipe fittings. Also, the paired pipe expanders keep the cutter wheels in a vertical alignment and thirdly, they loosen and scrape residue and built-up material from the inner wall of the pipe. A mandrel is connected to the trailing end of the cutter assembly and to a pipe adapter which in turn is connected to a foremost section of new pipe.
    Type: Grant
    Filed: February 1, 1994
    Date of Patent: August 8, 1995
    Inventor: Sam Abrams