Patents by Inventor Dennis N. Koenig, Jr.

Dennis N. Koenig, Jr. 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).

  • Ioric pump with cast impeller housing requiring three machined surfaces and one central piloting bore to control critical tolerances
    Patent number: 5205707
    Abstract: A toric pump has a metal impeller housing formed with a flat end face into which an annular impeller receiving recess extends to a depth which exceeds the axial thickness of the impeller mounted in the recess by an amount only sufficient to provide a minimum operating clearance for the impeller sides when an impeller cover is mounted on the housing with a flat end face of the impeller cover in sealed face to face engagement with the flat end face of the housing. A bore in the impeller housing receives a cylindrical portion of the pump drive motor to accurately locate the rotary axis of the impeller with respect to the peripheral side surface of the stripper portion of the pump housing. All impeller-stripper portion clearances are established by machining of the die cast impeller housing and the formation of a flat surface on the impeller cover.
    Type: Grant
    Filed: April 3, 1991
    Date of Patent: April 27, 1993
    Assignee: Coltec Industries Inc.
    Inventors: John E. Smith, Dennis N. Koenig, Jr., William E. Ruhig, Jr.