Patent ID: 6761234
Filing Date: 2004-07-13
Classification: B60G,B62D

Abstract:
A skid steer vehicle comprising:a chassis having a right side, a left side, a front end, and a rear end; an engine mounted on the chassis; two steerable front wheels operably connected to the front end of the chassis, wherein one of the two steerable front wheels is on the right side of the chassis and another of the two steerable front wheels is on the left side of the chassis; two steerable rear wheels operably connected to the rear end of the chassis, wherein one of the two steerable rear wheels is on the right side of the chassis and another of the two steerable rear wheels is on the left side of the chassis; at least one steering actuator operably connected to the four steerable front and rear wheels to steer said wheels with respect to the chassis; at least one hydraulic drive motor operably connected to at least one of the right side wheels; at least another hydraulic drive motor operably connected to at least one of the left side wheels; a first hydraulic circuit configured to operate said at least one and said at least another hydraulic drive motors, wherein the first hydraulic circuit is operable (1) to simultaneously drive said at least one hydraulic drive motor in a forward direction and said at least another hydraulic motor in a backward direction, (2) to simultaneously drive said at least one and said at least another hydraulic motors in a forward direction, and (3) to simultaneously drive said at least one and said at least another hydraulic motors in a backward direction; and a second hydraulic circuit configured to drive said at least one steering actuator to a first position and to a second position, wherein in said first position the two steerable front wheels are turned left and the two steerable rear wheels are turned right, and wherein in said second position the two steerable front wheels are turned right and the two steerable rear wheels are turned left.