Hydraulic directional solenoid valve and door closer having a hydraulic directional solenoid valve

A hydraulic 3/2-solenoid control valve, comprising:

• a valve housing;
• a valve chamber integrated into the valve housing, including:
• a first valve seat bore as a connection to a pressure line;
• a free aperture to an operating line;
• and
• a second valve seat bore as a connection to a tank line;
• a solenoid, and
• a valve spindle partially arranged in the valve chamber that protrudes from the valve chamber through the second valve seat bore toward the solenoid and movable by the solenoid, the valve spindle comprises:
• a first sealing surface facing the first valve seat bore within the valve chamber;
• and
• a second sealing surface facing the second valve seat bore,
• wherein at least one of the first valve seat bore and the second valve seat bore can be closed selectively;
• and
• a connection of the tank line to an armature space of the solenoid exists one of along the valve spindle and inside the valve spindle,
• wherein a pressure generation in the armature space is prevented.

A hydraulic cartridge 3/2-solenoid control valve, comprising:

• a hydraulic 3/2-solenoid control valve having:
• a valve housing configured to be at least partially inserted into a valve adapter;
• a valve chamber integrated into the valve housing, having:
• a first valve seat bore configured for connection to a pressure line;
• a second valve seat bore configured for connection to an operating line;
• and
• a free aperture configured for connection to a tank line;
• a solenoid;
• and
• a valve spindle partially arranged in the valve chamber that protrudes from the valve chamber through the second valve seat bore toward the solenoid and configured to be moved by the solenoid, the valve spindle including:
• a first sealing surface facing the first valve seat bore arranged within the valve chamber;
• and
• a second sealing surface facing the second valve seat bore,
• wherein at least one of the first valve seat bore and the second valve seat bore can be closed, and
• wherein:
• when the second valve seat bore is closed, the valve spindle is pulled into the second valve seat bore by a differential area ratio by a pressure in the operating line;
• and
• wherein a sealing diameter of the valve spindle outside the valve chamber is larger than a diameter of the second valve seat bore, such that the differential area ratio is generated, the sealing diameter defined at a seal between the valve spindle and the solenoid.

A hinge door closer, comprising:

• a door closer housing;
• a piston assembly arranged in the housing;
• an output shaft operationally coupled to the piston assembly and configured to link the door closer to a door or an arm;
• and
• at least one of a hydraulic 3/2-solenoid control valve and a hydraulic cartridge solenoid control valve that are hydraulically coupled to at least the piston assembly, wherein
• the hydraulic 3/2-solenoid control valve comprises:
• a valve housing arranged in the door closer housing;
• a valve chamber integrated into the valve housing, having:
• a first valve seat bore configured for connection to a pressure line;
• a second valve seat bore configured for connection to an operating line;
• and
• a free aperture configured for connection to a tank line;
• a solenoid;
• and
• a valve spindle partially arranged in the valve chamber that protrudes from the valve chamber through the second valve seat bore toward the solenoid and configured to be moved by the solenoid, the valve spindle including:
• a first sealing surface facing the first valve seat bore arranged within the valve chamber;
• and
• a second sealing surface facing the second valve seat bore,
• wherein at least one of the first valve seat bore and the second valve seat bore can be closed, and
• wherein:
• when the second valve seat bore is closed, the valve spindle is pulled into the second valve seat bore by a differential area ratio by a pressure in the operating line;
• and
• wherein a sealing diameter of the valve spindle outside the valve chamber is larger than a diameter of the second valve seat bore, such that the differential area ratio is generated, the sealing diameter defined at a seal between the valve spindle and the solenoid, and
• the hydraulic cartridge solenoid control valve comprises:
• a hydraulic 3/2-solenoid control valve having:
• a valve housing configured to be at least partially inserted into a valve adapter;
• a valve chamber integrated into the valve housing, having:
• a first valve seat bore configured for connection to a pressure line;
• a second valve seat bore configured for connection to an operating line;
• and
• a free aperture configured for connection to a tank line;
• a solenoid;
• and
• a valve spindle partially arranged in the valve chamber that protrudes from the valve chamber through the second valve seat bore toward the solenoid and configured to be moved by the solenoid, the valve spindle including:
• a first sealing surface facing the first valve seat bore arranged within the valve chamber;
• and
• a second sealing surface facing the second valve seat bore,
• wherein at least one of the first valve seat bore and the second valve seat bore can be closed, and
• wherein:
• when the second valve seat bore is closed, the valve spindle is pulled into the second valve seat bore by a differential area ratio by a pressure in the operating line;
• and
• wherein a sealing diameter of the valve spindle outside the valve chamber is larger than a diameter of the second valve seat bore, such that the differential area ratio is generated, the sealing diameter defined at a seal between the valve spindle and the solenoid,
• wherein the valve adapter is formed in the door closer housing.