Patents by Inventor John L. Rector

John L. Rector 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).

  • Gravity screen filter with dynamic backwash
    Patent number: 5425876
    Abstract: A self-cleaning gravity screen for removing particulate material from a liquid stream. The screen slopes, and beneath it a rotary wand sweeps against its lower side to keep the screen perforations open and assist movement of retained solids along the screen. The wand is driven by a rotary water wheel.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: June 20, 1995
    Assignee: Claude Laval Corporation
    Inventor: John L. Rector