Zero turn radius or ZTR vehicle with a one-pump two motor mechanism

A Zero Turn Radius vehicle, comprising:

• a frame;
• an engine operatively attached to the frame;
• first and second ground engaging means for use in providing mobility to the vehicle;
• a pumping means operatively driven by the engine, the pumping means having a vehicle-speed input, the pumping means being operable to selectively deliver output power in response to the vehicle-speed input;
• first and second double acting actuators, wherein the output power from the pumping means is operatively communicated in parallel to the first and second double acting actuators, the first double acting actuator having a first steering input that is selectively adjustable and a first steering output responsive to the first steering input, the first steering output being driveably connected to drive the first ground engaging means in forward and reverse directions, the second double acting actuator having a second steering input that is selectively adjustable and a second steering output responsive to the second steering input, the second steering output being driveably connected to drive the second ground engaging means in forward and reverse directions, and wherein the first and second actuators are independently driven;
• a steering member selectively adjustable in first and second steering directions, the steering member being operably connected to engage the first and second steering inputs,
• wherein, when the steering member is adjusted in the first steering direction, the first steering output is increased with respect to a forward direction and the second steering output is decreased with respect to the forward direction, and,
• wherein, when the steering member is adjusted in the second steering direction, the first steering output is decreased with respect to a forward direction and the second steering output is increased with respect to the forward direction;
• and,
• an accelerator member operably connected to engage the vehicle-speed input, the accelerator member being selectively adjustable in first and second accelerator directions for use in driving the vehicle in the forward and reverse directions respectively.

A Zero Turn Radius mower, comprising:

• a frame;
• a mower deck operatively attached to the frame;
• an engine operatively attached to the frame;
• first and second ground engaging wheels rotatably connected with respect to the frame;
• a hydrostatic transmission including:
• a double acting variable displacement pump operatively connected to the engine, the pump having a first input, the pump being operable to selectively deliver bi-directional variable output fluid power, in response to the first input;
• first and second double acting motors, wherein the output power from the variable displacement pump is operatively communicated in parallel to the first and second double acting motors, the first double acting motors having a first steering input that is selectively adjustable and a first steering output responsive to the first steering input, the first steering output being rotatably connected to drive the first ground engaging wheel in forward and reverse directions, the second double acting motor having a second steering input that is selectively adjustable and a second steering output, responsive to the second steering input, the second steering output being rotatably connected to drive the second ground engaging wheel in forward and reverse directions, and, wherein, the first and second motors are independently driven;
• a steering wheel rotatably adjustable in first and second steering directions, the steering wheel being operably connected to engage the first and second steering inputs,
• wherein, when the steering wheel is adjusted in the first steering direction the first steering output is increased with respect to a forward direction and the second steering output is decreased with respect to the forward direction, and,
• wherein, when the steering wheel is adjusted in the second steering direction the first steering output is decreased with respect to a forward direction and the second steering output is increased with respect to the forward direction;
• and,
• an accelerator lever operably connected to engage the first input to the variable displacement pump, the accelerator lever being selectively adjustable in first and second accelerator directions for use in driving the vehicle in the forward and reverse directions respectively.