Adjustable pipette
US5650124A · kind A · utility
Inventor
Key dates
| Filing date | Jul 24, 1995 |
| Grant date | Jul 22, 1997 |
| Priority date | — |
| Expiry date | Jul 24, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2300/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adjustable pipette has a piston axially moveable in a body for alternately drawing and dispensing a liquid sample. An upper stop is moved axially to vary the sample size by rotation of a threaded shaft. A drive member is keyed to the threaded shaft for simultaneous rotation but the drive member and shaft can freely move axially relative to one another. The drive member is moved axially to an unlocked position in order to adjust the sample volume and is axially moved to a locked position in which rotation and inadvertent misadjustment of the sample volume is prevented. A collar on the drive member fits tightly into a throat of the pipette body to lock the drive member against rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.