Patents Assigned to Tuthill Pump Group, a subsidiary of Tuthill Corporation
  • Rotary pump apparatus and method
    Patent number: 6210138
    Abstract: Rotary pump apparatus includes a pump housing having a drive gear and a driven gear positioned in the interior of the housing. A fluid-flow passageway provides fluid to a volumetrically changing space located between meshing gear teeth to prevent the pressure in the space from dropping below the vapor pressure of the fluid.
    Type: Grant
    Filed: July 8, 1999
    Date of Patent: April 3, 2001
    Assignee: Tuthill Pump Group, a subsidiary of Tuthill Corporation
    Inventor: Phillip V. Cortez