Hydraulic control valve
AssigneeGM Global Technology Operations LLC
InventorDale A. Frank
Life of this patent
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Abstract
A hydraulic control valve for controlling hydraulic circuits comprises a valve housing defining a valve bore, a first spool valve slidably positioned within the valve bore and adapted to control a first hydraulic circuit, and a second spool valve slidably positioned within the valve bore and adapted to control a second hydraulic circuit. The first spool valve and the second spool valve are positioned co-axially within the valve bore and are independently slidable within the valve bore to allow the first and second spool valves to control the first and second hydraulic valves independently of one another.
Claims19
A hydraulic control valve for controlling hydraulic circuits, comprising:
- a valve housing defining a valve bore;
- a first spool valve including a first land, a second land, a central shaft extending between the first and second lands and a pin shaft extending longitudinally within the valve bore, the first spool valve slidably positioned within the valve bore and adapted to control a first hydraulic circuit;
- and
- a second spool valve including a first land, a second land, a central shaft extending between the first and second lands, and a cylindrical bore formed therein, the second spool valve slidably positioned within the valve bore and adapted to control a second hydraulic circuit, the pin shaft of the first spool valve extending through the cylindrical bore of the second spool valve;
- wherein the first spool valve and the second spool valve are positioned co-axially within the valve bore and are independently slidable within the valve bore to allow the first and second spool valves to control the first and second hydraulic valves independently of one another.
A hydraulic control valve for controlling hydraulic circuits, comprising:
- a valve housing defining a valve bore;
- a first spool valve slidably positioned within the valve bore and adapted to control a first hydraulic circuit;
- a second spool valve slidably positioned within the valve bore and adapted to control a second hydraulic circuit, wherein the first spool valve and the second spool valve are positioned co-axially within the valve bore and are independently slidable within the valve bore to allow the first and second spool valves to control the first and second hydraulic valves independently of one another;
- and
- a sleeve positioned within the valve housing, an inner diameter of the sleeve defining the valve bore, the sleeve including a supply channel formed therein interconnecting first and second supply ports, and an exhaust channel formed therein interconnecting first and second exhaust ports.
Dependencies are inferred from the claim text.