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:
Jun. 15, 2021
Filed:
Jun. 12, 2019
Nippon Pillar Packing Co., Ltd., Osaka, JP;
Tatsunari Koyama, Osaka, JP;
Akira Nakatsu, Osaka, JP;
NIPPON PILLAR PACKING CO., LTD., Osaka, JP;
Abstract
The present invention intends to provide a liquid sensor device that achieves both the improvement of durability and the improvement of property determination accuracy. The liquid sensor device includes: an electrode pairthat is formed on a sensor boardand covered by an insulating protective film; a resistance measurement partthat supplies AC current to the electrode pairto measure the resistance value of oil; a parasitic capacitance storage partthat holds the parasitic capacitance Cs of the electrode pair; and a property determination partthat, on the basis of the resistance value Rand the parasitic capacitance Cs, determines the deterioration of the oil