Patent ID: 9068578
Filing Date: 2015-06-30
Classification: E02F,F15B

Abstract:
1. A hydraulic system, comprising: a first variable displacement pump; a variable displacement first travel motor selectively fluidly connected to the first variable displacement pump in a closed-loop manner in a first hydraulic circuit; a first switching valve associated with the first travel motor and configured to selectively switch a flow direction of fluid passing through the first travel motor from the first variable displacement pump; a variable displacement second travel motor selectively fluidly connected to the first variable displacement pump in a closed-loop manner; a second switching valve associated with the second travel motor and configured to selectively switch a flow direction of fluid passing through the second travel motor from the first variable displacement pump, a second hydraulic circuit selectively fluidly connected to the first hydraulic circuit via at least one combining valve, the second hydraulic circuit including a second variable displacement pump, wherein the at least one combining valve is configured to direct fluid from the first and second pumps to the linear actuator.