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:
Dec. 01, 1992
Filed:
Jun. 10, 1991
Kazumitu Nukui, Kanagawa, JP;
Naoki Matubara, Tokyo, JP;
Tokyo Gas Co., Ltd., Tokyo, JP;
Oval Engineering Co., Ltd., Tokyo, JP;
Abstract
A calorimeter comprises a laminar flow type flowmeter for measuring the volume of flow of a fuel gas as a value proportional to the difference between the pressures of the laminar flow elements and a stream pipe serially connected to the laminar flow type flowmeter to create a laminar flow therethrough. The stream pipe is provided with a heating means, a temperature sensing means for detecting the difference between the temperatures of the fuel's flow to and from the stream pipe portion heated by the heating means, and a thermal-type flowmeter for measuring a mass flow proportional to the differential temperature sensed. A computer unit calculates the outflow pressure and the volume of flow of the fuel gas in its normal state from the measured values of the absolute pressure, the differential pressure and the temperature of the fuel gas flowing into the laminar flow-type flowmeter and calculates the calorific value of the fuel gas as a value that is negatively proportional to the differential pressure.