Flow meter

US6675662B2 · kind B2 · utility

Assignee

• Wieder GmbH · DE

Inventors

• Klaus A. Wieder · Nuremberg, DE
• Bernd Reyer · Gerbrunn, DE

Key dates

• Filing date: Oct 19, 2001
• Grant date: Jan 13, 2004
• Expiry date: Mar 24, 2022

Classification

• Technology area (CPC G): Physics
• CPC primary: G01F1/22
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a flow meter, especially for liquid cooling media in injection molds, comprising a housing with an inlet and outlet conduit and inside the housing a piston that is slidable against the force of an axially acting spring by the pressure of the fluid flowing through the housing in such a way that the displacement of the piston takes place in dependence upon the flow rate and is indicated through a window, provision is made, to attain a high measuring accuracy with a simple construction, for a helical spring (22) that is guided in extension of the inlet conduit (2) in an axial direction to be disposed in such a way that the entering fluid is transported around the centrically disposed helical spring (22).