Magnetic valve with manual override

US8074961B2 · kind B2 · utility

Assignee

• Festo AG & Co. KG · DE

Inventors

• Carsten Clauss · Eßlingen, DE
• Ralf Forcht · Wissen, DE
• Thomas Lederer · Herrsching am Ammersee, DE
• Christian Waldeck · Eßlingen, DE

Key dates

• Filing date: Sep 18, 2008
• Grant date: Dec 13, 2011
• Expiry date: Sep 6, 2030

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/0658
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Proposed is a magnetic valve with manual override, through the actuating element of which a magnetic core that serves as a valve element or that is connected to a valve element can be shifted from an off position into an operating position without excitation of a magnetic coil system assigned to it. To detect the position of the magnetic core that is held in the operating position by the manual override there is provided a coil current monitoring device that monitors the rise of the coil current after the magnetic coil system has been switched on, which device has a detection device for detection of the absence of a drop in current as formed by movement of the magnetic core after being switched on and a signaling device for electrical signaling of a position of the magnetic core that is held in the operating position by the manual override if said drop in current is absent.