Control valve assembly for an indirect pneumatic control, and method for controlling a working fluid pressure

US11493061B2 · kind B2 · utility

Assignee

• J. D. Neuhaus Holding GmbH & Co. KG · DE

Inventors

• Piotr Krupnik · Iserlohn, DE
• Simon Brose · Hattingen, DE

Key dates

• Filing date: Jan 30, 2019
• Grant date: Nov 8, 2022
• Expiry date: Apr 28, 2039

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F15B2211/8855
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A control valve assembly for indirect pneumatic control and method for controlling a working fluid pressure, which enable precise, sensitive and speed-variable controlling. The assembly includes two valve units, a working fluid inlet, and a control fluid inlet. A working fluid channel connects the working fluid inlet through the two valve units to an outlet. A valve piston arranged within a valve cylinder of the valve units is movable between open and closed positions. A spring element biases the valve piston toward the closed position, and a control pressure chamber applies a control pressure counteracting the spring element's bias. When a control pressure is applied in the first chamber, the first valve piston is moved to the open position. Two opposite valve surfaces form a valve opening opened at varying widths when the valve piston is moved in the valve cylinder because of a changing control pressure, and the working pressure can be finely adjusted corresponding to the valve opening width depending on the control pressure.