Adjustable volume pipetting device
US4098125A · kind A · utility
Inventor
Key dates
| Filing date | Mar 30, 1977 |
| Grant date | Jul 4, 1978 |
| Priority date | — |
| Expiry date | Mar 30, 1997 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L3/0224
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An adjustable volume pipetting device comprising a barrel assembly and a plunger assembly, including a plunger wire, and so constructed that the length of the plunger wire stroke is adjustable while retaining a fixed relationship between the end of the plunger wire and the end of a capillary tube. The novel construction comprises a barrel assembly including an elongated barrel, a sleeve threadably engaged with said barrel and axially adjustable thereon by relative rotation between said barrel and sleeve, a tubular stop coaxially mounted within said sleeve adjacent one end thereof, a capillary tube coaxially mounted in the one end of said sleeve and projecting outwardly from said sleeve and barrel, a slip ring slidably mounted on said barrel adjacent the other end of said sleeve, and a lock nut threadably engaged with said barrel and axially adjustable thereon by relative rotation between said barrel and nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.