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:
Sep. 22, 1998
Filed:
Sep. 19, 1996
Shogo Kurisaki, Ibaraki-ken, JP;
Takashi Takebayashi, Ibaraki-ken, JP;
Pinghou Ge, Ibaraki-ken, JP;
Tomonobu Endou, Ibaraki-ken, JP;
SMC Kabushiki Kaisha, Tokyo, JP;
Abstract
A threshold value is stored in a CPU using setting switches. When a fluid is introduced into a flow passage, it lowers the temperature of a first thermistor heated by a regulated constant-current source, increasing the output voltage of the first thermistor. A second thermistor outputs a voltage corresponding to the temperature of the fluid. A differential amplifier outputs a differential voltage between the output voltages of the first and second thermistors, and the differential voltage is converted by an A/D converter into a digital voltage that is applied to a CPU. The CPU refers to a data table stored in a memory to determine a flow rate of the fluid based on the digital differential voltage. When the determined flow rate is greater than the threshold value, the CPU turns on transistors to energize loads as external devices. When the determined flow rate is smaller than the threshold value, the CPU turns off transistors to de-energize loads.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile