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. 18, 1993
Filed:
Sep. 26, 1991
Applicant:
Inventors:
Hiroshi Muramatsu, Tokyo, JP;
Isao Karube, Kawasaki, JP;
Assignee:
Seiko Instruments Inc., , JP;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 6442 ; 73 5425 ;
Abstract
A viscosity measuring system comprises a cell containing gelable liquid and a piezoelectric resonator mounted in the cell. The piezoelectric resonator has a prescribed characteristic, such as electrical resistance or resonant frequency, which varies in accordance with the gelating of the liquid. Solid particles suspended in the liquid are deposited on the piezoelectric resonator during gelating of the liquid to amplify the prescribed resonator characteristic. A measuring circuit measures the variation of the resonator characteristic to thereby determine the gelation time of the liquid.