Patents by Inventor Karl Duex

Karl Duex 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).

  • Angled dual check valve
    Publication number: 20060137747
    Abstract: Poppet valve installation or removal is simplified through the use of a unitary poppet assembly that may be accurately placed into a valve body through an access opening and wherein the poppet is slidably mounted in a stem in an insert while being permanently affixed thereto by the interference fit between a shoulder on the poppet stem and a post within the sleeve.
    Type: Application
    Filed: December 27, 2004
    Publication date: June 29, 2006
    Inventor: Karl Duex