Patents by Inventor Kenneth R. Duncan

Kenneth R. Duncan 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: 6969215
    Abstract: A pipeline is constructed in steep terrain by digging a ditch on the incline, assembling pipe joints together adjacent a top of the incline and then lowering the assembled pipe joints down the incline through the ditch. A wheeled assembly at the lower end of the pipeline carries much of the load and rolls down the ditch as allowed by winch equipment at the top of the incline. Bearing supports are installed periodically in the ditch to support the pipeline, the supports being of a softer material than coatings on the pipe.
    Type: Grant
    Filed: March 11, 2004
    Date of Patent: November 29, 2005
    Inventor: Kenneth R. Duncan
  • Patent number: 5997739
    Abstract: A spin-on element includes a cylindrical housing, a tap plate at one end of the housing, and an adapter ring supported by and bounding the other end of the housing. A collection bowl can be threadably attached to the adapter ring. An imperforate inner support tube in the housing fluidly separates a central opening in the tap plate from peripheral openings. The inner tube has an inner surface defining a central chamber in fluid communication with the central opening. A perforated outer support tube surrounds the inner support tube, and has an outer surface defining a peripheral chamber in the housing. The inner and outer support tubes together define an intermediate chamber, in fluid communication with the peripheral openings in the tap plate. A nylon water coalescing mesh surrounds the outer support tube, and is curled over the ends of the outer tube. A first end cap comprising a foam gasket with openings to allow fluid to enter the intermediate chamber is disposed at one end of the support tubes.
    Type: Grant
    Filed: April 16, 1998
    Date of Patent: December 7, 1999
    Assignee: Parker-Hannifin Corporation
    Inventors: Michael D. Clausen, Kenneth R. Duncan
  • Patent number: 4587613
    Abstract: A microprocessor control system includes a bit/byte memory array to enhance the performance characteristics of a microprocessor. The bit/byte memory array selectively allows the microprocessor to manipulate individual bits in the memory thereby reducing both execution time and program size. In addition, the bit/byte memory array allows the microprocessor to address data bytes in the memory array to quickly enable the transferring of large amounts of data.
    Type: Grant
    Filed: February 21, 1985
    Date of Patent: May 6, 1986
    Assignee: Solid Controls, Inc.
    Inventor: Kenneth R. Duncan