Controllable solenoid valve

US7172171B2 · kind B2 · utility

Assignee

• Rausch & Pausch GmbH · DE

Inventors

• Werner Doehla · Gefrees, DE
• Michael Rauch · Short Hills, US

Key dates

• Filing date: Oct 15, 2003
• Grant date: Feb 6, 2007
• Expiry date: Dec 17, 2023

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/87241
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

Controllable solenoid valve in which, due to the interaction between a magnetic force caused by an electrical flow and a spring force acting against the magnetic force, at least one first sealing body in the interior of a valve housing is displaced in axial direction between two final positions whereby moving relative to its first sealing seat. The interior extends from one electromagnet to a connection. To enable, in a simple manner, a specific reproducible influencing of the sequence speed of cylinder controls in hydraulic drives and to prevent uncontrolled movements by these drives, the first sealing seat up to the first sealing body is provided with an axially extending cylindrical housing inside of which a slide is axially displaced according to the electrical flow. The cylindrical housing comprises radially oriented passages, whereby these passages are closed if the first sealing body is located in a final position in its first sealing seat or in the immediate vicinity of the first sealing seat, and the passages are opened if the first sealing body is located in the opposite final position.