Patents by Inventor Mark D. Hilde

Mark D. Hilde 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).

  • Wet cup throat seal and bearing assembly
    Patent number: 7168856
    Abstract: Wet cup throat seal (3) and bearing (2) combination is designed for use in a reciprocating piston pump where in the wet cup (1) is designed to hold the seal assembly thereby insuring proper displacement rod (5) alignment and maximizing seal life. The construction also allows for easy and inexpensive replacement and allows piston seals (6) and throat seals (3) to be interchangeable.
    Type: Grant
    Filed: May 23, 2000
    Date of Patent: January 30, 2007
    Inventors: Mark T. Weinberger, James P. Korzenowski, Mark D. Hilde