Patents by Inventor Donald A. Derlein

Donald A. Derlein 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).

  • Pipe cleaning modules and systems and methods for their use
    Patent number: 5622571
    Abstract: A cleaning module for cleaning sewer pipes including sewer liner, and other types of conduits. The cleaning module may comprise a single hydraulically propelled unit, wedge-shaped and selected to fit pipe size. Pipeline walls are scoured by the slurry agitation produced by hydraulic pressure jets in the module. Alternatively, the module is assembled in situ and the relative size of components is selected depending upon the diameter of the pipeline. The module may comprise a front unit and rear unit or a frame assembly and a drive assembly. The modules contain a motor, preferably a hydraulic motor. The motor drives flails, thereby disintegrating solid waste or generating and propelling a sludge slurry. The slurry scours the pipeline walls by cavitation and abrasion action. Also disclosed are systems for cleaning a sewage line section and methods of their use.
    Type: Grant
    Filed: April 26, 1995
    Date of Patent: April 22, 1997
    Assignee: Pipeline Services, Inc.
    Inventor: Donald A. Derlein
  • Pipe cleaning modules and systems and methods for their use
    Patent number: 5435854
    Abstract: A cleaning module for cleaning sewer pipes including sewer liner, and other types of conduits. The cleaning module may comprise a single hydraulically propelled unit, wedge-shaped and selected to fit pipe size. Pipeline walls are scoured by the slurry agitation produced by hydraulic pressure jets in the module. Alternatively, the module is assembled in situ and the relative size of components is selected depending upon the diameter of the pipeline. The module may comprise a front unit and rear unit or a frame assembly and a drive assembly. The modules contain a motor, preferably a hydraulic motor. The motor drives flails, thereby disintegrating solid waste or generating and propelling a sludge slurry. The slurry scours the pipeline walls by cavitation and abrasion action. Also disclosed are systems for cleaning a sewage line section and methods of their use.
    Type: Grant
    Filed: June 15, 1992
    Date of Patent: July 25, 1995
    Assignee: Pipeline Sewer Services, Inc.
    Inventor: Donald A. Derlein
  • Pipe cleaning modules and systems and methods for their use
    Patent number: 5122193
    Abstract: A sewer cleaning module for cleaning sewer pipes in preparation for relining. The module is assembled in situ and the relative size of components is selected depending upon the diameter of the pipeline. The module may comprise a front unit and rear unit or a frame assembly and a drive assembly. The modules contain a motor, preferably a hydraulic motor. The motor drives flails, thereby disintegrating solid waste or generating and propelling a sludge slurry. The slurry scours the pipeline walls by cavitation and abrasion action. Also disclosed are systems for cleaning a sewage line section and methods of their use.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: June 16, 1992
    Assignee: Albuquerque Underground, Inc.
    Inventor: Donald A. Derlein