Dosing system

US9498577B2 · kind B2 · utility

Assignee

• RAUMEDIC AG · DE

Inventors

• Frank Skaper · Leupoldsgrün, DE
• Gero Eichelkraut · Dresden, DE
• Thomas Braun · Biberach, DE
• Bernd Spindler · Helmbrechts, DE
• Dirk Witzel · Eichenzell, DE
• Mirko Krimmel · Tegernsee, DE
• Andreas Vogt · Geisa, DE

Key dates

• Filing date: May 7, 2014
• Grant date: Nov 22, 2016
• Expiry date: Dec 7, 2034

Classification

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

Abstract

The invention concerns a dosing system for adjusting a dose volume of a fluid medium. The dosing system has a longitudinal center axis, a dosing sleeve with at least one communication opening, a dosing plunger, which can move axially in the dosing sleeve between a retracted and a depressed position to take up and dispense the medium through the communication opening, and a retraction limiting element to delimit a maximum axial retraction path of the dosing plunger. The retraction limiting element in at least one position can be axially fixed to the dosing plunger and can move radially to the longitudinal center axis between an inner position, axially fixed on the dosing plunger, and an outer position relative to the dosing plunger. In the inner position, it is completely inside the dosing sleeve. Furthermore, the dosing system has an end stop arranged on the dosing sleeve for interaction with the retraction limiting element in the retracted position of the dosing plunger.