High sensitivity coagulation detection apparatus
US5174961A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 1991 |
| Grant date | Dec 29, 1992 |
| Priority date | — |
| Expiry date | Jan 18, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/4905
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Coagulation related activities are detected in a fluid sample in a plunger sensor cartridge. The cartridge includes a test cell with a reagent chamber and a reaction chamber and a plunger assembly. A reagent drive subassembly forces the contents of the reagent chamber into the reaction chamber. The plunger assembly is raised and released by a plunger lifting subassembly to allow it to descend through the sample of liquid in the bottom of the reaction chamber. A dispenser subassembly automatically meters precise quantities of fluid into the test cells. The plunger lifting subassembly and the reagent drive subassembly are mechanically separate and are controlled separately. Stepper motors are used to provide precise control over the degree, rate and sensitivity of movement of the plunger lifting subassembly, the reagent drive subassembly and the dispensing subassembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.