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:
Jul. 10, 2001
Filed:
Mar. 11, 1999
Frederick P. Boyle, Kirtland, OH (US);
Gary Garvin, Mentor, OH (US);
Klaus-Werner Damm, Chagrin Falls, OH (US);
Daniel H. Heath, Ravenna, OH (US);
Herman F. George, Chardon, OH (US);
Peter John Moore, Hampshire, GB;
Dale Hicks, Surrey, GB;
Terence Edward Robinson, Hampshire, GB;
The Lubrizol Corporation, Wickliffe, OH (US);
Abstract
A viscometer for sensing or characterizing the stress required to shear a fluid at a given rate includes a pair of members coaxially mounted for relative rotation. Between the members is an annular gap defining a flow path for the fluid. The flow path is configured such that during differential rotation of the members, fluid is caused to flow through the annular gap that is a function of the differential rotation and the viscosity of the fluid. A sensor measures the torque or torque equivalent required to achieve such differential rotation between the members.