Pipette
US4250755A · kind A · utility
19Cited by
4References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1979 |
| Grant date | Feb 17, 1981 |
| Priority date | — |
| Expiry date | Oct 22, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L2300/026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pipette has an elongated body having a bore extending to the opposite ends thereof. A tube is secured to one end of the body. A plunger extends through the body with one end extending into the tube to draw liquid into the tube and discharge it from the tube. A first stop member is mounted on the plunger for rotation with the plunger and is axially movable relative to the plunger. This stop member is threaded to the body within the bore. A second stop member is mounted on the plunger and a spring biases this stop member towards the first stop member. A counter is driven by the rotation of the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.