Patent ID: 9044750
Filing Date: 2015-06-02
Classification: B01L,C12N

Abstract:
1. A pipette, comprising: a hollow tubular body, two ends of the tubular body respectively formed with a first opening and a second opening air communicable with one another, the tubular body has an inner wall defining a main chamber therein and an outer wall; at least one gas seal ring, each disposed in a seal slot formed on the inner wall proximate to the second opening; a nut coupled to the outer wall proximate to the second opening, the nut formed with a cavity air communicable with the second opening and a nut opening oriented towards the tubular body, the nut including a pressing edge formed therein proximate to the nut opening; and a shaft including a shaft body and movably disposed in the main chamber and the cavity; wherein the pressing edge presses against the at least one gas seal ring via a coupling between the nut and the outer wall such that the at least one gas seal ring is compressed and a ring inner edge of the at least one gas seal ring expands towards the shaft to abut the shaft body.