Repeating pipet having a plunger advance mechanism
US5672320A · kind A · utility
Inventor
Key dates
| Filing date | Oct 2, 1995 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Oct 2, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01L3/0234
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An advancing mechanism is provided for movement of a pipet plunger in a repeating pipet. The advancing mechanism includes a rack communicating with the pipet plunger, a pawl pretensioned against the rack and displaceable by an activating element and an engagement control element located between the rack and the pawl. The advancing mechanism also includes an adjusting element for adjusting the engagement control element to one of a plurality of engagement positions. The engagement control element is preferably a rotatable sleeve having lower axial steps and upper limiting stops. The pawl is connected to a sliding body connected with the actuating element and axially displaceable within the sleeve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.