Patents Represented by Attorney, Agent or Law Firm Warren R. Kice
  • Continuously variable displacement pump with predefined unswept volume
    Patent number: 6742441
    Abstract: Apparatus and method for controlling an unswept volume in a piston system. The method includes rotating a shaft around a rotation point to drive a piston within a cylindrical volume in a periodic manner, modifying the stroke length of the piston, and moving the center of the shaft relative to the cylindrical volume such that a change in an unswept volume or compression ratio is controlled.
    Type: Grant
    Filed: December 5, 2002
    Date of Patent: June 1, 2004
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Jim B. Surjaatmadja, Stanley V. Stephenson