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:
Aug. 03, 1999
Filed:
Apr. 28, 1998
Steven J Dougherty, Sumner, WA (US);
Other;
Abstract
A method and apparatus for determining entrained gas-phase content of process streams comprising compression of the process stream, measurement of the compressive behavior, and calculation of the volume of the entrained gas-phase. A piston device is rapidly translated into the process stream. The inertia of the liquid adjacent to the end of the piston causes the volume of fluid close to the end of the piston to serve as a dynamic containment vessel so that the liquid adjacent to the piston is compressed by the movement of the piston. A pressure sensor integrally incorporated in the end of the piston measures the pressure pulse caused by the rapid movement of the piston. The pressure pulse is inversely related to the volumetric fraction of gas phase in the liquid adjacent to the end of the piston. Processor electronics amplify and condition the pressure pulse, convert the pressure pulse to the equivalent gas-phase content by means of calibration tables, and provide output signals suitable for process control of the variables that influence the gas-phase content.