Device for withdrawing blood for diagnostic applications

US7077828B2 · kind B2 · utility

Assignee

• Roche Diagnostics GMBH · DE

Inventors

• Hans Kuhr · Mannheim, DE
• Richard Forster · Pfreimd, DE

Key dates

• Filing date: Jul 3, 2002
• Grant date: Jul 18, 2006
• Expiry date: Jan 18, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B5/15194
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A device for withdrawing blood for diagnostic purposes including a lancet and a lancet drive having a loadable elastic drive spring provided within an elongated housing. A relaxing motion of the drive spring is converted into a puncturing motion to move the lancet at high speed in a puncturing direction until its tip exits out of an opening of the housing. The device includes a transmission in the housing that has an input side that transforms the motion of a loading element along a linear loading path into a rotational motion of a lancet drive rotor to load the lancet drive rotor by tensioning the drive spring. When the lancet drive is triggered, the output side of the transmission converts a rotational motion of the lancet drive rotor, driven by the drive spring, into the puncturing motion in a direction along the main axis.