Patent ID: 6663525
Filing Date: 2003-12-16
Classification: F16H

Abstract:
In a hydro-mechanical transmission including a planetary gear arrangement having a rotatable output, a first rotatable input connected to an output of a fluid motor drivingly rotatable by passage of a flow of pressurized fluid therethrough, and a second rotatable input connected to a clutch engageable for rotatably drivingly connecting the second rotatable input to a rotatable output of a mechanical power source, and a fluid operated brake engageable when fluid therein is pressurized for connecting the second rotatable input to a fixed member for preventing rotation of the second rotatable input, an improved method for placing the transmission in a neutral operating state comprising the steps of:automatically disengaging the clutch so as to disconnect the rotatable output of the mechanical power source from the second rotatable input; automatically engaging the fluid brake so as to connect the second rotatable input to the fixed member to prevent rotation of the second rotatable input; and automatically preventing the passage of the flow of pressurized fluid through the fluid motor so as to prevent the driving rotation thereof when the clutch is disengaged and the fluid brake is engaged, such that driving rotation of an output of the transmission is prevented.