Patent ID: 11879821
Assignee: HAEMOGRAPH PTY LTD
Field: Measurement (Instruments)
Classification: CPC G  A | IPC A  G

Claim 0:
1. A device for determining rheological properties of a non-Newtonian fluid, the device comprising:
a channel, the channel having a plurality of sub-sections, each sub-section having a substantially constant cross-section being provided with a respective differential pressure apparatus for determining a pressure differential across at least a portion of that sub-section, the sub-sections being of different cross-sectional areas;
a first reservoir that is adapted to be located at a first end of the channel and to be placed in fluid communication with the channel, the first reservoir being of variable internal volume;
a second reservoir that is adapted to be placed in fluid communication with first reservoir via the channel, the second reservoir being of variable internal volume;
an inlet for allowing fluid to be introduced into the device;
an outlet, separate to the inlet, at an end of the channel for allowing gas to be substantially eliminated from the device; and
an electronically controlled driving element for varying the volume of the first reservoir, such that when the first and second reservoirs are in fluid communication with the first and second ends of the channel respectively, varying the volume of the first reservoir causes fluid to flow along the channel in alternating directions, at pre-determined flow rates in each of the channel sub-sections such that pre-determined strain rates are imposed on the fluid.