Valve device

A valve device, comprising:

• a valve housing having fluid ports therein;
• a first valve piston movable longitudinally in the valve housing between positions separating at least two of the fluid ports from one another or interconnecting at least two of the fluid ports as a function of a travel position of the first valve piston;
• a first latch connected to the valve piston detachably fastening the first valve piston in one of travel positions of the first valve piston, the first latch having a first latching part movable into and out of a first latching position and having a first control body movable independently of the first valve piston, the first control body being movable to a first blocking position preventing the first latching part disposed in the first latching position from leaving the first latching position by blocking the first latching part;
• and
• a rod drive extends centrally through the first valve piston.

A valve device, comprising:

• a valve housing having fluid ports therein;
• a first and second valve pistons movable longitudinally in the valve housing between positions separating at least two of the fluid ports from one another or interconnecting at least two of the fluid ports as a function of travel positions of the first and second valve pistons;
• first and second latches connected to the first and second valve pistons, respectively, on end faces thereof facing away from each other detachably fastening the first and second valve pistons, respectively, in one of travel positions of the first and second valve pistons, the first and second latches having first and second latching parts, respectively, movable into and out of first and second latching positions and each having a first control body movable independently of the respective first or second valve piston, each of the first control bodies being movable to a first blocking position preventing the respective first or second latching part disposed in the first latching position from leaving the first latching position by blocking the first latching part;
• and first and second actuators are connected to the first and second latches, respectively, such that when the first actuator is activated to move the first latch from an unlatched state thereof to a latched state thereof, the second actuator is activated to move the second latch from an unlatched state thereof to a latched state thereof, and vice versa.