Piston-operated pipette with interchangeable displacement unit

US9364827B2 · kind B2 · utility

Assignee

• BRAND GMBH & CO KG · DE

Inventors

• Steffen Gehrig · Heide, DE
• Günter Hochholzer · Werbach, DE
• Burkard Schaub · Eußenheim, DE

Key dates

• Filing date: Nov 19, 2013
• Grant date: Jun 14, 2016
• Expiry date: Sep 30, 2034

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01L2200/028
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A piston-operated pipette with a drive unit with a piston drive and a displacement unit mounted on the drive unit, the displacement unit being dismountable from the drive unit, the drive unit having an actuating drive for the piston drive and a receiving section for the displacement unit. The displacement unit has a fastening section which fits the receiving section of the drive unit, there being a first detachable mechanical connection between the actuating drive and the piston drive and there being a second detachable mechanical connection between the receiving section of the drive unit and the fastening section of the displacement unit. The second detachable mechanical connection is made as a magnetic connection. A mechanical arrangement for breaking the magnetic connection is provided between the receiving section and the fastening section, the magnetic connection being releasable by actuating the arrangement for breaking the magnetic connection.