Repeater pipette with a hydraulic operating device

US6440370B1 · kind B1 · utility

Assignee

• Eppendorf AG · DE

Inventors

• Roger Blum · Hamburg, DE
• Gerhard Hofmeier · Hamburg, DE
• Rudiger Huhn · Kellinghusen, DE

Key dates

• Filing date: Apr 3, 2000
• Grant date: Aug 27, 2002
• Expiry date: Apr 3, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T436/2575
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A pipetting system including a syringe (2), a working piston (5) connectable with the syringe piston (24) and extending into a working chamber (3), an actuating piston (7) extending into the working chamber, and a storage chamber (4) connected with the working chamber (3) by a valve (12) that provides for flow of the hydraulic liquid, which fills both chambers, from the working chamber (3) into the storage chamber when the working piston (5) is displaced into the working chamber (3), for flow of the hydraulic fluid from the storage chamber (4) into the working chamber (3) when the actuating piston is displaced out of the working chamber, and that separates the storage and working chambers (3, 4) when the actuating piston (7) is advanced into the working chamber.