Patents Assigned to Recovery Engineering
  • Pump apparatus
    Patent number: RE33135
    Abstract: The present invention is directed to pump apparatus for purifying water. The apparatus includes a housing containing a reciprocating plunger pump with a permanently attached filtering module preferably containing a reverse osmosis element. A manifold with a hydraulic actuated shuttle which serves as the spool for a three way valve is attached to the pump housing. The valve provides alternate pressurization and exhaust for the rod side of the piston. The pump may be operated by a hand lever or by power mechanism.
    Type: Grant
    Filed: August 10, 1987
    Date of Patent: December 26, 1989
    Assignee: Recovery Engineering
    Inventors: William F. Wanner, Sr., deceased, William F. Wanner, Jr., trustee