Method and apparatus for controlling a press plunger system

US4170876A · kind A · utility

Inventors

• Herbert R. Dits · Lebach, DE
• Egon Bauer · Sulzbach/Saar, DE

Key dates

• Filing date: Jun 9, 1977
• Grant date: Oct 16, 1979
• Expiry date: Jun 9, 1997

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/76
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A drive system for use in a press in which a pneumatic cylinder and hydraulic pressure transformer are coupled together and connected by separate valves to respective gas and hydraulic sources. The valves are controlled by position transducers arranged along the path of movement of the output member of the transformer.