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:
Feb. 23, 1982
Filed:
Jan. 14, 1980
Daniel Fruman, Le Pecq, FR;
Marshall Tulin, Chevy Chase, MD (US);
Abstract
Apparatus for determining rheological parameters of viscoelastic fluids is provided. The apparatus comprises two similar cylinder-piston assemblies ending at identical flow orifices. The pistons are pushed conjointly by a motor at an adjusted speed. A differential manometer is arranged between the cylinders immediately upstream of the orifices. One of the cylinders contains fluid to be studied and the other a Newtonian comparison fluid. The strain rates of the fluids are defined by the adjusted flow rates, and the pressure differential expresses elongation stress of the viscoelastic fluid. This apparatus is applicable in the rheological study of dilute solutions of macromolecular compositions.