Patent ID: 6935454
Filing Date: 2005-08-30
Classification: B60K,B60Y,B62D,F16H

Abstract:
1. A zero turn vehicle comprising: a first drive system comprising a first hydraulic pump and a first hydraulic motor, where the first hydraulic pump is connected to the first hydraulic motor through a closed hydraulic loop having a high pressure side and a low pressure side; a first output axle driven by the first hydraulic motor and connected to one wheel of the vehicle; a second drive system comprising a second hydraulic pump and a second hydraulic motor, where the first hydraulic pump is connected to the first hydraulic motor through a closed hydraulic loop having a high pressure side and a low pressure side; a second output axle driven by the second hydraulic motor and connected to a second wheel of the vehicle; a first valve located between the high pressure side and low pressure side of the first closed hydraulic loop to reduce a pressure rise rate when the first hydraulic pump is engaged; and a second valve located between the high pressure side and low pressure side of the second closed hydraulic loop to reduce a pressure rise rate when the second hydraulic pump is engaged.