Patents by Inventor David L. Stoltz

David L. Stoltz 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: 5682620
    Abstract: An improved drain cable apparatus (10) is provided which facilitates clearing of clogged drainpipes (16) while providing a way to readily determine whether the drainpipe (16) has been cleared, without the necessity of withdrawing the drain cable (70) from the drainpipe (16). The apparatus (10) includes a tubular main body (12) adapted for connection via a sleeve (34) to the drainpipe (16); the main body (12) is equipped with internal drain cable-cleaning sponge elements (32), as well as an apertured end cap member (18) permitting insertion of the drain cable (70). Structure (20) for determining when the drainpipe (16) has been cleared includes a water inlet (48) and a spaced water outlet (54) arranged so that water delivered to the main body (12) passes outwardly through the outlet (54) while the drainpipe (16) remains clogged, but allows such water to pass through the drainpipe (16) when the latter is clear.
    Type: Grant
    Filed: November 17, 1995
    Date of Patent: November 4, 1997
    Assignee: Stoltz & Murphy Inc.
    Inventors: David L. Stoltz, Max E. Murphy