Patents Represented by Attorney G. H. Telfher

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  • Pressure extraction pump system for recovering liquid hydrocarbons from ground water
    Patent number: 4826406
    Abstract: There is disclosed a pressure extraction pump system for recovering liquid hydrocarbons from contaminated ground water collected in a well. The pump system includes a pump with a pump vessel and an open top sleeve extending above the pump vessel for skimming the upper portion of the liquid collected in a well bore. The pump also includes a liquid level sensing device for sensing the level of the liquid in the sleeve and activating a pumping cycle. The pump also has a quick closing intake valve.
    Type: Grant
    Filed: October 8, 1987
    Date of Patent: May 2, 1989
    Assignee: S&ME, Incorporated
    Inventor: Samuel L. Wells