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:
Jul. 06, 1999
Filed:
May. 13, 1997
NGK Insulators, Ltd., , JP;
Abstract
A particle sensor includes a flow path of a fluid, having a fluid inlet and a fluid outlet, and a sensor element provided in said flow path, which comprises (a) a vibrating section having such a mass that is sensitive to the collision of solid particles contained in the fluid, with the vibrating section and (b) a detecting section for detecting the vibration of the vibrating section caused by said collision and converting the vibration to electric signals. The sensor has a means capable of selectively detecting any vibration of the vibrating section having a frequency higher than the primary resonance frequency of the sensor element. This particle sensor has improved sensitivity to solid particles and can distinguish the signals generated by collision of solid particles, from the signals generated by collision of bubbles, at a high accuracy.