Switchable pressure limiting valve

US9182048B2 · kind B2 · utility

Assignee

• Thomas Magnete GmbH · DE

Inventors

• Thomas Rolland · Gebhardshain, DE
• Mike Heck · Derschen, DE

Key dates

• Filing date: Mar 31, 2012
• Grant date: Nov 10, 2015
• Expiry date: Jun 28, 2032

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16K31/0672
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A switchable pressure limiting valve with an electromagnet (1) and with a device (2) for opening and closing a passage for the fluid stream. The opening of the valve is determined by the balance of forces at the tappet (3) upon which the pressure force of the fluid at the P-connection (4), the pressure force of the fluid at the T-connection (13) and the forces of two springs (5) and (6) act. The force of the spring (6) is varied by means of the position of the armature of the electromagnet. When the pressure force at the P-connection (4) outweighs the sum of the other forces, the valve opens. The above-mentioned device for opening and closing is composed of a diaphragm (7) and of a sealing seat (12), and this diaphragm is tension-mounted sealingly between the magnetic pole (10) and the housing (21).