Device and system for dispensing or aspirating/dispensing liquid samples
US7055723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2001 |
| Grant date | Jun 6, 2006 |
| Priority date | — |
| Expiry date | Jan 19, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2035/1041
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a device (1) for dispensing or aspirating/dispensing liquid samples, including a pump (2) and a micro-ejection device (3), the micro-ejection device (3) having a pulse generator (4) with a chamber (5). The pulse generator (4) is used to produce pressure waves in the liquid in order to cause the samples of a liquid to be dispensed. The micro-ejection device (3) also comprises an end piece (6) and a liquid line (7) which connects the pulse generator (4) to the end piece (6) the pulse generator comprises a micro-actuator (10) which is configured to function in the same direction as that in which the pressure wave leaves the chamber (5). The inventive devices are characterised in that the chamber (5), in the area of the end facing away from the end piece (6), or the corresponding connecting element (14) has a narrowed section (16) which restricts any expansion of the pressure waves in the direction of the pump (2). The invention also relates to systems with multiple devices of this type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.