Apparatus for dispensing precise volumes of a liquid
US6021925A · kind A · utility
3Cited by
13References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1998 |
| Grant date | Feb 8, 2000 |
| Priority date | — |
| Expiry date | Apr 21, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B43/067
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus is provided for delivering precise volumes of a sample liquid. A piston is moved linearly into a first chamber containing an incompressible hydraulic liquid. The chamber includes one wall formed of a flexible diaphragm. The diaphragm separates the first chamber from a second chamber containing a sample liquid. The degree of expansion of the diaphragm and dispensing of the sample liquid from the second chamber are dependent upon the position of the piston within the first chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.