Patent · US Expired

Apparatus for determining the flow shear stress of suspensions in particular blood

US4519239A · kind A · utility

33Cited by

3References

15Claims

0Family size

Assignee

Holger Kiesewetter · DE

Inventors

Holger Kiesewetter · Berlin, DE
Friedrich Jung · Aachen, DE
Hartmut Radtke · Aachen, DE
Reinhard Witt · Endingen am Kaiserstuhl, DE

Key dates

Filing date	May 11, 1983
Grant date	May 28, 1985
Priority date	—
Expiry date	May 11, 2003

Classification

Technology area (CPC G)Physics
CPC primaryG01N33/49
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention concerns a measuring apparatus for checking and determining the flow shear stress of certain suspensions, principally blood, by a static or dynamic method and to thereby plot the viscosity of the suspension. The apparatus employs an internal measuring chamber comprised of a passage arrangement to simulate the natural microcirculation area wherein a network of capillary passages diverge from a main passage, with at least two of the capillary passages of different lengths, with a length ratio that can range from 3:1 to 15:1, with those capillaries connected to a source of variable pressure and extending past a detector unit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.