Device for administering a fluid

US12420027B2 · kind B2 · utility

Assignee

• Henke-Sass, Wolf GmbH · DE

Inventors

• Frank Altermann · Tuttlingen, DE
• Robin Sauter · Tuttlingen, DE
• Maikel WIEDMANN · Immendingen, DE
• Daniel Seeh · Immendingen, DE
• Anika SCHMIDT · Fridingen an der Donau, DE

Key dates

• Filing date: Jul 9, 2020
• Grant date: Sep 23, 2025
• Expiry date: Dec 1, 2042

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61M2205/3375
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for administering a fluid can include a cylinder, a piston displaceable in the cylinder and connected to a piston rod, and a tensioning device connected to the piston rod. The tensioning device includes a ramp rotatable via a motor, and a ramp track extending along a helical line. The tensioning device includes a roller which is in contact with the ramp track. To perform a tensioning procedure, the ramp track is rotated such that the roller runs on the region of inclination as far as the second plateau so the piston is moved to its rear end position. To perform a dispensing procedure, the ramp track is rotated until the roller runs over a transfer region and is accelerated toward the first plateau, thereby the piston is moved toward an open dispensing end. A control unit determines whether the tensioning procedure and/or dispensing procedure has taken place correctly.