Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Indication or control of braking – acceleration – or deceleration
Reexamination Certificate
2006-07-25
2006-07-25
Nguyen, Thu V. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Indication or control of braking, acceleration, or deceleration
Reexamination Certificate
active
07082361
ABSTRACT:
The apparatus is an electronic speed control for farm machines. A microprocessor is fed data on the tractor engine speed, the tractor ground speed, and the manual speed lever setting, and electronically matches the desired ground speed to the engine speed to prevent stalling the engine. Ground speed is controlled by using the microprocessor to electrically vary a control valve that replaces the usual mechanical linkage between the speed control lever and the hydraulic pumps driving the hydraulic wheel motors.
REFERENCES:
patent: 5576962 (1996-11-01), Ferguson et al.
patent: 6305486 (2001-10-01), Polzin et al.
Berger John G.
Clevenger, Jr. James T.
Ehrhart Philip J.
Foster Christopher A.
Peters Jeremy Daniel
Bucchioneri Stephen A.
CNH America LLC
Harms Michael C.
Nguyen Thu V.
Stader John William
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