Patent · US Expired

High-temperature, high-shear capillary viscometer

US4723442A · kind A · utility

6Cited by
7References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateNov 20, 1986
Grant dateFeb 9, 1988
Priority date—
Expiry dateNov 20, 2006

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01N11/06
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A high-temperature, high-shear viscometer includes a closed end tube having a chamber. A first inlet to the tube is for introducing pressurized gas therein. A second inlet to the tube is for introducing the liquid into the chamber and removing excess liquid from the chamber. A capillary tube is in communication with the chamber. An outlet for the liquid is in communication with the capillary tube. A timer is provided for measuring the efflux time of the liquid in the capillary tube. The timer is started by a device in communication with the first inlet. The timer is stopped by a device which senses the movement of the pressurized gas. The movement sensor includes a thermistor.

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