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:
Nov. 22, 2011
Filed:
Sep. 08, 2008
Wataru Hisada, Kitanagoya, JP;
Mitsuo Shintani, Suita, JP;
Manabu Yamaguchi, Suita, JP;
Yoshiki Aramatsu, Suita, JP;
Wataru Hisada, Kitanagoya, JP;
Mitsuo Shintani, Suita, JP;
Manabu Yamaguchi, Suita, JP;
Yoshiki Aramatsu, Suita, JP;
Sintokogio, Ltd., Aichi, JP;
Abstract
An apparatus for measuring a flow rate of a powder when a powder is conveyed by using air as a carrier gas, which apparatus measures the flow rate based on the change of capacitance of the powder to be measured. The apparatus that can measure the flow rate of a powder with high accuracy by compensating for the effect of the thermal drift of the capacitance. It includes a protecting pipe for conveying a powder, a housing pipe having measuring electrodes, and a transducer for outputting an output of the measuring electrode to a display. It further includes an atmospheric temperature sensor and a carrier gas-temperature sensor. The sensoris directly fixed to the protecting pipeat a place that does not overlap the housing pipe, and includes a circuit for compensating for the output of the measuring electrode, which output is the capacitance determined based on a graph of a curve of the relationship between a capacitance and a flow rate, based on the difference between the output of the atmospheric temperature sensor and the output of the carrier-gas-temperature sensor.