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US 6,997,045 B2Granted
Rheomixer device
AssigneeW.R. Grace & Co.-Conn.
InventorsOlafur H. Wallevik, Paul Sandberg, David F. Myers
Life of this patent
Estimating the term…
Abstract
Device and methods for rotationally mixing and rheological testing of sample liquids, such as cement particle suspensions, employ mixing blades and shear-resistant members having substantially noncoincident orbital paths. Rheology is assessed by measuring the resistance of the liquid to rotation of the device. Both rheological and calorimetric testing can be performed during mixing, which ensures uniformity of rheology and hence the accuracy of results.
Claims27
A device for mixing and assessing a sample liquid within a container, comprising:
- a rotatable shaft member having a generally elongate body;
- at least one propeller blade attached to said shaft member and having a blade face oriented to propel a liquid in a direction along said elongate shaft body when said shaft is rotated within a liquid;
- and
- at least one elongate shear-resistant member for resisting circular motion when said shaft member is rotated within the liquid, said at least one shear-resistant member being spaced at a fixed distance from, and being fixed in a fixed rotational relationship with respect to, said at least one propeller blade, and said at least one shear-resistant member being spaced apart from and attached in fixed spatial relation with respect to said rotatable shaft member.
1 more element
A rheomixer device comprising:
- mixing blades for mixing a liquid, shear-resistant members for measuring rheology of a liquid, a mix container for mixing a liquid using said blades and shear-resistant members, said container having a heat sensor for calorimetric measurement of the liquid, said mixing blades and shear-resistant members being attached to a rotatable shaft in fixed rotational and spatial relationship with respect to each other.
Dependencies are inferred from the claim text.