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US 10,890,174 B2Granted
Hydrostatic system providing volumetric efficiency when pump is neutral
AssigneeDanfoss Power Solutions Inc.
InventorJoshua Cronbaugh
Life of this patent
Estimating the term…
Abstract
A hydrostatic system that provides different volumetric efficiency at different states and includes a pump with a discharge and supply line. Connected between the discharge and supply line is a valve. The valve is adapted to move to a position having a cross port orifice when the pump is in a neutral state and a position where the ports are blocked when the pump is in an operation state.
Claims15
A hydrostatic system, comprising:
- a pump with a discharge conduit and a supply conduit, wherein the discharge conduit and the supply conduit are outside the pump;
- and
- a valve connected between the discharge conduit and the supply conduit;
- wherein the valve is adapted to selectively move to a position having a cross port orifice when the pump is in neutral allowing a flow between the discharge conduit and the supply conduit, and a pair of end positions that each block a connection between the discharge conduit and the supply conduit.
1 more element
A hydrostatic system, comprising:
- a pump having a discharge conduit and a supply conduit;
- a three position spool valve having a center position and a pair of end positions;
- the center position having a cross port orifice configured to permit a flow between the discharge conduit and the supply conduit;
- and
- the pair of end positions configured to block a flow between the discharge conduit and the supply conduit;
- wherein the discharge conduit and the supply conduit are outside the pump.
3 more elements
A hydrostatic system, comprising:
- a pump having a discharge conduit and a supply conduit;
- and
- a valve having a center position and a pair of end positions;
- wherein the valve is in a central position when an allowed port pressure differential is present and in one of the pair of end positions when a port pressure differential exceeds the allowed port pressure differential;
- wherein the pair of end positions block flow between the discharge conduit and the supply conduit;
- wherein the discharge conduit and the supply conduit are outside the pump.
3 more elements
Dependencies are inferred from the claim text.