Patents by Inventor Roger L. Leaf

Roger L. Leaf 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).

  • Peristaltic pump
    Patent number: 4201525
    Abstract: A peristaltic liquid pump in which a box-like housing encloses a rotatable head carrying a pair of rollers which engage a U-shaped portion of plastic tubing carrying liquid to be pumped. The housing has a light-transmissive cover member enabling the operator to view the tubing therein. A membrane is interposed between the rollers and the U-shaped portion of the plastic tubing, with the membrane having a relatively stiff surface for contacting the rollers and a relatively sticky surface for contacting the plastic tubing.
    Type: Grant
    Filed: July 5, 1978
    Date of Patent: May 6, 1980
    Assignee: Baxter Travenol Laboratories, Inc.
    Inventors: Richard I. Brown, Roger L. Leaf