Pressure Regulation Patents (Class 475/127)
Valving controls shift timing (Class 475/128)
Manual regulator (Class 475/130)
  • Integrated hydro-mechanical transmission
    Patent number: 5203747
    Abstract: An integrated hydromechanical transmission capable of achieving continuous variability from maximum forward, through zero, to full reverse, and vice versa. The unit will achieve significantly higher rates of efficiency than current hydrostatic transmissions and, as well, has many other desirable characteristics. Intended for use in heavy-duty drive-wheel-steered and tracked vehicle applications such as hay windrowers, grain swathers, crawler tractors, military armoured vehicles, etc.
    Type: Grant
    Filed: October 10, 1991
    Date of Patent: April 20, 1993
    Inventor: Walter S. Warren