Patent ID: 7937938
Filing Date: 2011-05-10
Classification: B60Y,F01P,F15B,F16H

Abstract:
1. A valve assembly for a hydraulically driven motor, comprising: a manifold that includes a first motor port, a second motor port, at least one tank port, a pump port, and a line sensing port; a load control valve, which includes a first electrical actuator, attached to the manifold; a flow direction control valve, which includes a second electrical actuator, attached to the manifold; a pressure transfer valve attached to the manifold, and having a first configuration at which the first motor port is fluidly blocked from the second motor port, and a second configuration at which the first motor port is fluidly connected to the second motor port; and wherein the pressure transfer valve moves from the first configuration toward the second configuration when a pressure differential between the line sensing port and one of the first and second motor ports exceeds a predetermined pressure differential.