Patents by Inventor Leland E. Pearson

Leland E. Pearson 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).

  • Eduction unit
    Patent number: 4213479
    Abstract: A portable eduction unit includes a tank, a single first hose for extending into a source of solids and liquid, such hose being connected to the tank through a check valve which opens in response to a partial vacuum in the tank. A hose within the tank has one end supported by a float and communicates with the first hose through a check valve that opens in response to pressurization of the tank, and a shut-off valve for controlling the flow between the first-mentioned hose and the check valves.
    Type: Grant
    Filed: November 7, 1978
    Date of Patent: July 22, 1980
    Assignee: Industrial & Municipal Engineering, Inc.
    Inventor: Leland E. Pearson