Glass syringe barrels with increased cone breaking forces

US11833334B2 · kind B2 · utility

Assignee

• SCHOTT PHARMA AG & CO. KGAA · DE

Inventors

• Roman Oberhänsli · Binningen, CH
• Ivo Andreoli · Uzwil, CH
• Martha Strassmann · Wald, CH
• Andreas Langsdorf · Ingelheim am Rhein, DE
• Peter Thomas · Singapore, SG

Key dates

• Filing date: Aug 12, 2020
• Grant date: Dec 5, 2023
• Expiry date: Nov 5, 2041

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/19
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A glass syringe barrel is provided that has an at least partially conically shaped upper portion and a longitudinal axis. The glass syringe barrel has a top end through which a liquid can be ejected and a bottom end into which a plunger stopper can be pushed. The glass syringe barrel includes, in a direction from the top end to the bottom end, a cone, a shoulder region, and a body region. The shoulder region has and outer contour that has a concave and substantially circular arc-shaped area ci with an outer radius r1. The outer contour of the glass syringe barrel in the shoulder region is defined by a certain value for r1.