Spring launched needle safety clip

US7601139B2 · kind B2 · utility

Assignee

• B. Braun Melsungen AG · DE

Inventors

• Kevin Woehr · Fritzlar, DE
• Helmut Freigang · Körle, DE
• Juergen Fuchs · Flörsheim, DE
• Juergen Reuter · Bad Hersfeld, DE
• Klaus Siemon · Münster, DE
• Joerg Wende · Warburg, DE
• Frank Hilberg · Kassel, DE

Key dates

• Filing date: Sep 20, 2002
• Grant date: Oct 13, 2009
• Expiry date: Mar 7, 2026

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S128/919
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A hypodermic needle assembly configured such that the movement of a needle shield into position to block the needle tip occurs as a direct consequence of a longitudinal force applied by insertion of a syringe plunger is provided. The hypodermic needle assembly according to the present invention comprises a needle, a needle hub, and a safety spring clip assembly, the safety spring clip assembly being configured to automatically launch from the needle hub and slide along the needle until the spring clip meets a needle stop at the needle tip, thus preventing the guard from being removed from the needle shaft. A method of using the hypodermic needle assembly according to the present invention is also provided, which includes the method of launching the spring clip with a syringe having multiple advancing mechanisms.