Cannula for medical syringes

US6355017B2 · kind B2 · utility

Assignee

• H. Weidmann A.G. · CH

Inventors

• Heinz Buttgen · Bad Krozingen, DE
• Tilo Callenbach · Jona, CH

Key dates

• Filing date: Jun 18, 1999
• Grant date: Mar 12, 2002
• Expiry date: Jun 18, 2019

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M5/3287
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A cannula is retractably mounted with a needle holder (9) in a housing (5). A switching device (7, 8) allows the hollow needle (10) to be retracted after use into the housing (5). The needle holder (9) secures against rotation the hollow needle (10) in the housing (5) in a predetermined orientation. The housing (5) is preferably provided on its outer side with markings (13) which indicate the orientation of the hollow needle (10). The hollow needle (9) cannot twist when it is retracted. Another advantage is that the orientation of the needle point need not be determined before making an injection.