PIPET HOLDER Russian patent published in 1999 - IPC

FIELD: laboratory equipment. SUBSTANCE: pipet holder gas casing with coupling for pipet connection and suction-drain assembly communicating with it. Suction-drain assembly includes disc mounted for rotation about axis. Disc interacts with elastic tube adjacent to supporting member through side projection provided on it. Novelty is that projection is made as roller, and operating surface of supporting member is bent to fit arc of circumference concentric relative to arc described by projection (roller) during disc rotation. EFFECT: simplified construction. 2 cl, 5 dwg