초록 ▼

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 provid

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.

대표청구항 ▼

1. A pipetting system, comprising:a step-and repeat pipette (1); a syringe (2) releasably connected with the step-and-repeat pipette (1) and having a syringe aperture (2) and a syringe piston (24) displaceable toward and away from the syringe aperture (28); and means providing for displacement of th

1. A pipetting system, comprising:a step-and repeat pipette (1); a syringe (2) releasably connected with the step-and-repeat pipette (1) and having a syringe aperture (2) and a syringe piston (24) displaceable toward and away from the syringe aperture (28); and means providing for displacement of the syringe piston (24) toward and away from the syringe aperture (28), the providing means including: a working chamber (3) filled with a hydraulic liquid, a variable volume, storage chamber (4) filled with the hydraulic liquid, a working piston (5) connectable to the syringe piston (24) and extending into the working chamber (3), an actuating piston (7) sealingly extending into the working chamber and adapted to be actuated from outside, and valve means (12) interconnecting the working and storage chambers (3 and 4) and providing for (i) flow of the hydraulic fluid from the working chamber (3) into the storage chamber (4) upon displacement of the syringe piston (24) away from the syringe opening (28), for (ii) separating the working chamber (3) from the storage chamber (4) upon displacement of the actuating piston (7) into the working chamber (3), whereby the hydraulic liquid forces the working piston (5) out of the working chamber (3) by one proportioning step for advancing the syringe piston (24) toward the syringe opening (28), and for (iii) flow of the hydraulic fluid from the storage chamber (4) into the working chamber (3) upon displacement of the actuating piston (7) out of the working chamber (3).