Prefilled hypodermic syringe

US5833653A · kind A · utility

Assignee

• ARZNEIMITTEL GMBH APOTHEKER VETTER & CO. RAVENSBURG · DE

Inventors

• Helmut Vetter · Ravensburg, DE
• Udo J. Vetter · Ravensburg, DE
• Thomas Otto · Würzburg, DE
• Georg Rossling · Berlin, DE

Key dates

• Filing date: Sep 9, 1997
• Grant date: Nov 10, 1998
• Expiry date: Sep 9, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2005/31508
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A hypodermic syringe has a tubular body extending along and centered on an axis and having an axially forwardly open front end, a piston rod axially displaceable in the body and having a plunger rod extending rearwardly from the body, and a plug fitted into the front end and forming an axially through-going passage. An elastomeric membrane is provided in the plug traversing and blocking the passage. Furthermore structure fixed to the plug includes a point in the passage spaced axially slightly forward of the membrane so that the membrane can be deformed axially forward to engage and be pierced by the point.