PRESELECTION VALVE, HYDRAULIC VALVE ASSEMBLY AND HYDRAULIC CONTROL DEVICE

• Main Authors: Steiler, Walter, Wechsel, Thomas, Heusser, Martin
• Format: Patent
• Language: English
• Published: 08.09.2022
• Subjects: BLASTING; CONTROLLING; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR; FLUID-PRESSURE ACTUATORS; FLUID-PRESSURE ACTUATORS, e.g. SERVO-MOTORS; HEATING; HYDRAULICS OR PNEUMATICS IN GENERAL; LIGHTING; MECHANICAL ENGINEERING; PHYSICS; REGULATING; SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES; WEAPONS

A preselection valve is for a hydraulic valve assembly with a switching element, a pressure input line, a first pressure output line and a first load pressure line with a load pressure inlet and output. The switching element is switchable from neutral to a first switching position. The pressure input line is connected to the first pressure output line in the first position. The preselection valve has a second and third load pressure line and a load pressure increasing device. The second load pressure line branches off the pressure input line upstream of the switching element. The load pressure increasing device is connected to the third load pressure line, which connects the pressure increasing device to the first load pressure line. The second load pressure line is connected to the pressure increasing device in the first switching position and the second load pressure line is blocked in the neutral position.