Patents by Inventor Keith Bechtum

Keith Bechtum 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).

  • Liquid filter arrangement with secondary filter and bypass flow
    Publication number: 20050103701
    Abstract: Liquid filter arrangements are provided. In general, the liquid filter arrangements comprise a housing, a primary filter element, a secondary filter construction and a bypass valve arrangement. The components are arranged such that in normal operation, liquid flows through the primary filter element and then through the secondary filter construction; and, such that during bypass valve operation, flow circumvents the primary filter element and is directed through the secondary filter construction, before leaving the liquid filter arrangement. Both a disposable spin on embodiment and a serviceable cartridge embodiment are provided.
    Type: Application
    Filed: March 6, 2003
    Publication date: May 19, 2005
    Applicant: Donaldson Company, Inc.
    Inventors: Keith Bechtum, Brent Gulsvig, David Mulder, John Hacker