Patents by Inventor Michael Walch

Michael Walch 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).

  • Fluid pump with enhanced seal
    Publication number: 20070065320
    Abstract: The invention concerns a fluid pump with a cylinder, piston and check valve for compressing the fluid having a high-pressure seal for precluding leakage of pressurized fluid. Any leakage from the high-pressure seal feeds back into an inlet area of the pump and recycles through the pump instead of leaking externally.
    Type: Application
    Filed: September 22, 2005
    Publication date: March 22, 2007
    Inventors: Michael Walch, James Wiegand