Patent · US Active

Viscometer using reaction torque measurement based on rotational phase difference

US10801938B2 · kind B2 · utility

1Cited by
6References
11Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 14, 2016
Grant dateOct 13, 2020
Priority date—
Expiry dateJan 14, 2036

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N11/14
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A viscometer capable of measuring a viscosity in high precision by increasing a transmission efficiency of a rotational torque while simplifying a structure and facilitating a down-sizing is provided. A viscometer includes: a hollow shaft motor; a needle shaft piercing through a hollow driving shaft of the hollow shaft motor and having an upper end side and a lower end side supported to be rotatable; a spring configured to transmit a driving force of the hollow shaft motor to the needle shaft; a spindle attached to the lower end side of the needle shaft; and a phase difference detection unit configured to detect a rotational phase difference between the hollow driving shaft 4 and the needle shaft.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.