Patent ID: 7111458
Filing Date: 2006-09-26
Classification: F16H

Abstract:
1. A loop flushing circuit comprising: a variable displacement hydraulic pump; a hydraulic motor fluidly connected to the pump connected to a closed loop circuit by first and second system pressure lines; an electrically proportional control valve connected to at least one of the system pressure lines and is fluidly connected to the hydraulic motor and adapted to regulate the flushing flow of the closed loop circuit, and a control means connected to the control valve in order to provide a loop flushing flow by activating the control valve when the at least one of the system pressure lines is a low pressure side of the loop flushing circuit wherein when at least one of the system pressure lines is at a threshold pressure, the threshold pressure holds close the electrically proportional control valve when an electrical signal is sent from the control means to open the electrically proportional control valve.