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:
May. 05, 1987
Filed:
May. 17, 1984
Tomonori Fukui, Kariya, JP;
Yukiyasu Ueno, Kariya, JP;
Nippondenso Co., Ltd., Kariya, JP;
Abstract
An optical detector assembly comprises a casing formed therein with a through bore having front and rear openings and a pair of opposite cavities located at both sides of the through bore, an air duct member disposed within the through bore to permit the flow of air passing therethrough, the duct member being formed at its peripheral wall with a pair of radial holes opening toward the cavities respectively, a light emission element arranged within one of the cavities to emit a luminous ray and pass it through the radial holes of the duct member toward the other cavity, a light receiving element arranged within the other cavity to receive the luminous ray emitted from the light emission element and passed through the radial holes, and an air induction assembly coupled over the front opening of the through bore for preventing entry of alien particles such as dirt, water, snow and the like into the duct member.