SAMPLING PIPETTE TIP AND PIPETTE FURNISHED WITH SAID TIP Russian patent published in 2010 - IPC B01L3/02 

FIELD: process engineering.

SUBSTANCE: group of inventions relates to fluid sampling and proportioning devices. Proposed invention covers sampling pipette rod (1) with its tail part (2) with inner wall (7) that allows holding tip (3). Said tail part has: first cylindrical section that passes from pipette lower end (8) has its first cross section arranged perpendicular to pipette lengthwise axis and has first diametre. Note that first cylindrical section has top end opposite the lower end. It has also first circular collar (6) comprising first transition end nearby top end of first cylindrical section. It has second cylindrical section with its second cross section perpendicular to pipette lengthwise axis, second diametre and first end opposite the first transition section. Note that second cylindrical section passes from first transition end to first end. Is has also second circular collar (5) including second transition end nearby first end of first circular collar, third cylindrical section with its third cross section perpendicular to pipette lengthwise axis and has third diametre. It has second end opposite the second transition end. Note here that third cylindrical section passes from second transition end to second end. Besides second diametre exceeds first diametre. Second and third diametre are selected so that with pipette tip fitted in tail part is in contact with at least a part of second cylindrical section for sealing purposes, and with at least a part of second cylindrical section for sealing purposes, and with at leas a part of third cylindrical section to make a stop. Invention covers also sampling pipette comprising at least one above described rod.

EFFECT: higher accuracy of fluid sampling and proportioning.

12 cl, 4 dwg