Patents Assigned to Natural Energy of Oklahoma, Inc.
  • Rapid thrust exercise machine
    Patent number: 4241913
    Abstract: An exercise machine utilizing a pivotal bar wherein resistance to applied force in one direction is provided by the passing of hydraulic fluid through an adjustable orifice and including a fluid bypass around said orifice to eliminate resistance to the force applied in the opposite direction.
    Type: Grant
    Filed: September 5, 1978
    Date of Patent: December 30, 1980
    Assignee: Natural Energy of Oklahoma, Inc.
    Inventors: Don L. Zwayer, Martin D. Sadler