Device for the injection of very small amounts of samples into cells
US4836244A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 1985 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jun 7, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87265
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and a device are proposed for the injection of very small amounts of samples into cells (74) with the aid of a microcapillary (10). During the injection, a constant injection pressure of about 0.12 bar, provided by a pressurized cylinder (46) is applied ot the microcapillary (10), which is reduced after the completion of the injection to a holding pressure of 0.02 bar until the next cell (64) is to be injected. A high-pressure (p.sub.1) supplied from another pressurized cylinder (44) serves for blowing out the microcapillary tip (12). A three-way valve (42) permits simple and rapid switching between the various pressure (p.sub.1, p.sub.2 and p.sub.3). Reproducible amounts of sample in the range from 10.sup.-11 ml to 10.sup.-13 ml can be injected reprodicibly, simply and rapidly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.