Power piston drive for armatures

Abstract

Abstract A SERVO-PISTON DRIVE FOR A CONTROL MEMBER FOR FLOWING GASEOUS OR LIQUID FLUIDS, WHICH CONTROL MEMBER IS ADJUSTABLE BETWEEN A CLOSED POSITION AND AN OPEN POSITION BY A DIFFERENTIAL PISTON MOVABLE IN A WORKING CYLINDER, WHICH DRIVE COMPRISES A WORKING CYLINDER DEFINING A CHAMBER ON OPPOSITE SIDES OF AT LEAST ONE DIFFERENTIAL PISTON AND INCLUDES ON ONE SIDE A PIPELINE SERVING AS INLET AND OUTLET AND ON THE OTHER SIDE IS CONNECTED WITH A PRESSURE RESERVOIR. A BY-PASS LINE CONNECTS BOTH SIDES OF THE DIFFERENTIAL PISTON. NON-RETURN VALVES IN THE BY-PASS LINE CLOSE OFF THE CHAMBERS IN FRONT OF AND BEHIND THE DIFFERENTIAL PISTON. THE DIFFERENTIAL PISTON IS MOVABLE IN THE CLOSING DIRECTION OF THE CONTROL MEMBER UPON EXERTING OF PRESSURE IN THE PIPELINE AND CHARGING THE PRESSURE RESERVOIR, THEREBY POSITIVELY OPENING ONE OF THE NON-RETURN VALVES AND BALANCING OUT THE PRESSURES IN THE CHAMBERS IN FRONT OF AND BEHIND THE DIFFERENTIAL PISTON AND CHARGING IN FRONT OF AND BEHIND THE THE CONTROL PRESSURE, AND UPON REVERSAL OF PRESSURE IN THE PIPELINE, THE BYPASS LINE IS SHUT OFF BY THE OTHER OF THE NON-RETURN VALVES, SO THAT THE DIFFERENTIAL PISTON IS FORCED BACK BY THE PRESSURE OF THE PRESSURE RESERVOIR AND THE CONTROL MEMBER IS OPENED.

Inventors

• 👤 Karl Strobel
• 👤 Hermann Krais
• 👤 Hans Freisler

Bibliographic Details