Motor vehicles – Steering by driving – Independently operable drive motors
Reexamination Certificate
2005-02-23
2008-12-23
Dickson, Paul N (Department: 3611)
Motor vehicles
Steering by driving
Independently operable drive motors
C180S006320
Reexamination Certificate
active
07467677
ABSTRACT:
A mechanism for controlling the movement of a zero turning radius power mower includes a single control arm movable in a forward direction and a rearward direction, and pivotable in a clockwise direction and in a counterclockwise direction. The control arm is connected via a pair of control linkages to a right hydraulic pump and to a left hydraulic pump such that when the control arm is moved in a forward direction the two hydraulic pumps power the drive wheels forward, and when the control arm is moved in a rearward direction the two hydraulic pumps power the drive wheels rearward. When the control arm is pivoted in a clockwise direction the left hydraulic pump powers the left drive wheel forward and the right hydraulic pump powers the right drive wheel rearward. When the control arm is pivoted in a counterclockwise direction the right hydraulic pump powers the right drive wheel forward and the left hydraulic pump powers the left drive wheel rearward.
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Dickson Paul N
Williams Maurice
Woodard Emhardt Moriarty McNett & Henry LLP
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