Easy eject pipette tip
US6197259A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1998 |
| Grant date | Mar 6, 2001 |
| Priority date | — |
| Expiry date | Nov 6, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L3/0279
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A plastic pipette tip easily and firmly mountable on and easily ejectable from a pipette mounting shaft of a pipette by application of relatively small axial mounting and ejection forces of about six and three (3) pounds respectively. The pipette tip includes a tubular proximal portion comprising (i) a frusto-conical open upper end portion having an inner diameter at its upper end greater than the diameter of a mounting shaft of the pipette to which the pipette tip is to be mounted, (ii) a hollow mid-portion and (iii) an annular sealing region at a junction of the open end and mid-portions. The annular sealing region has an inner diameter less than "x" and is designed to engage a lower end of a sealing zone of the mounting shaft to stretch radially outward as the mounting shaft is guided and stably oriented in the proximal portion thereby creating a fluid tight seal between the sealing zone and the sealing region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.