Patents by Inventor John E. Zimmer

John E. Zimmer 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).

  • Submersible pump with plastic housing
    Patent number: 4923367
    Abstract: A submersible pump having a plastic housing and adapted to accommodate multiple pump stages. The housing includes a pair of housing halves which enclose the impeller cartridges of the pump and an adjustment cone to retain the impeller cartridges for proper operation. Different length housings to accommodate a varying number of impeller stages are manufactured from the same mold utilizing removable inserts to vary the length of the mold. Accordingly, substantially integral housing halves can be formed at a substantial reduction in cost.
    Type: Grant
    Filed: March 14, 1988
    Date of Patent: May 8, 1990
    Assignee: Flint & Walling, Inc.
    Inventor: John E. Zimmer