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Williams; Keith R.
Minnetonka, MN
No. of patents:

Patent Number Title Of Patent Date Issued
7860631 Engine speed control for a low power hydromechanical transmission December 28, 2010
A method of operating a transmission of a vehicle. The method includes determining an open loop ratio percentage from an engine RPM input signal and a brake input signal using a first algorithm. Determining a closed loop ratio percentage from the engine RPM input signal, a vehicle RPM
7730722 Low power HMT with by-pass valve June 8, 2010
A method of operating a vehicle with a hydrostatic circuit. The method includes providing a hydrostatic circuit having first and second hydraulic kits that are fluidly connected to one another by first and second fluid lines. A by-pass valve is placed between the first and second hyd
5775453 Traction control system and method for hydraulically propelled vehicles July 7, 1998
A traction control system used to control a hydraulically propelled vehicle having front and rear drive assemblies has a variable displacement hydraulic motor coupled to each drive assembly. The hydraulic motors are connected in parallel to a pump. A control system senses the speed and

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