The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 26, 1998
Filed:
Jul. 01, 1996
David Wesley Forbes, Edmonton, CA;
The Fluid Corporation, Edmonton, CA;
Abstract
A method of testing the accuracy of results obtained from an automatic viscometer is described. Firstly, provide an automatic viscometer having at least two capillary tube test sections, each of a distinct uniform diameter. Secondly, calibrate the automatic viscometer by allowing a Newtonian fluid of known viscosity to flow through each of the capillary tube test sections and recording the time duration of the flow of the Newtonian fluid through each of the capillary tube test sections. Thirdly, calculate a viscosity constant for each capillary tube test section by dividing the known viscosity by the recorded flow time. Fourthly, send a test sample through each of the capillary tube test sections and record the time duration of the flow of the test sample through each of the capillary tube test sections. Fifthly, calculate values for the viscosity of the test sample based upon the times recorded and the known viscosity constant for each of the at least two capillary tube test sections. Sixthly, compare the viscosity measurement derived from each of at least two capillary tube test sections. A difference in viscosity measurement exceeding a predetermined limit indicating that the measurement is suspect and the accuracy of the automatic viscometer must be checked as the test sample is exhibiting non-newtonian behavior.