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...http://www.google.com.au/patents/US6440370?utm_source=gb-gplus-sharePatent US6440370 - Repeater pipette with a hydraulic operating device
