Variable volume pipette
US4593837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 15, 1985 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Mar 15, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L3/0275
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
There is disclosed a pipette useful with disposable tips, comprising a plurality of differently-sized pistons and a piston chamber for each piston. Each piston chamber has a vent passageway extending to the exterior surface of the pipette. The pipette is improved in that the mounting means for mounting a disposable tip comprises, not one surface, but a plurality of differently-sized surfaces. Furthermore, the vent passageway for all but the smallest piston chamber exits at a location in between the mounting surface for the tip of that particular piston chamber and the next smaller mounting surface, whereby the larger disposable tips seal over the vent passageways of the smaller disposable tips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.