Capillary viscometer apparatus for an uncomplicated determination of flow characteristics of fluent materials
AssigneeHaake Medingen GmbH
InventorsHorst Gramatte, Roland Worlitsch, Tim Haake
Life of this patent
Estimating the term…
Abstract
A capillary viscometer apparatus comprises a measuring cylinder (3) having an axially-movable piston (2) which is moved by a drive (1). The measuring cylinder (3) and the piston (2) define a measuring space (4) which communicates with a capillary tube or bundle (6) and a differential pressure gauge (7). A pressure difference between the measuring space (4) and a tested medium (12) is registered and processed by a signal-processing unit (9). A speed of the piston (2) is determined by means of a displacement-time measuring device or a speed measuring device (8) and this information is then transmitted to the signal-processing unit (9).
Claims12
A method for determining flow characteristics of a tested fluent material comprising the steps of:
- inserting a measuring cylinder into the tested fluent materials having at least one capillary opening and a differential pressure gauge arranged in a cylinder wall thereof for interconnecting a measuring space in said measuring cylinder with the tested fluent material;
- moving a piston in the cylinder for pumping said tested fluent material into and out of said cylinder through said capillary opening;
- measuring the differential pressure with said differential pressure gauge between the tested fluent materials in the cylinder and the tested fluent materials outside the cylinder.
A capillary viscometer apparatus for determining flow characteristics of surrounding tested fluent materials in an uncomplicated manner comprising:
- a measuring cylinder having an axially-movable piston therein forming a seal with an interior surface of a cylinder wall for defining a measuring space with said cylinder, a drive means for applying a force to the piston, a displacement-time measuring means for determining the piston movement relative to time, and a signal-processing means for determining viscosity, wherein:
- there is at least one capillary opening and a differential pressure gauge arranged in the cylinder wall outside of a stroke range of said piston for interconnecting said measuring space with the surrounding tested fluent materials, said differential pressure gauge thereby measuring the differential pressure between said measuring space and said surrounding tested fluent materials;
- and
- said signal-processing means is coupled to said differential pressure gauge for receiving a read-out of a pressure difference between said measuring space and said surrounding tested fluent materials as determined by said differential pressure gauge.
Dependencies are inferred from the claim text.