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:
Aug. 24, 1993
Filed:
Jun. 04, 1992
Nobuhide Kato, Aichi, JP;
Yasuhiko Hamada, Nagoya, JP;
NGK Insulators, Ltd., Nagoya, JP;
Abstract
A bottomed, inner cylindrical member 21 is placed around a sensor element 2, and a bottomed, outer cylindrical member 24 is located around this inner cylinder 21. The inner cylinder 21 includes a hole 21a at a location opposite to the electrode of sensor element 2, and the outer cylinder 24 includes holes 24a and 24b at locations that are not opposite to the hole 21a. Between the inner and outer cylinders 21 and 24, there is a gap wide enough to prevent water from staying therebetween due to surface tension. Water entering the sensor assembly through the holes 24a and 24b in the outer cylinder 24 is immediately discharged out of the holes 24a and 24b through the gap between the outer and inner cylinders 24 and 21. Water, even when entering the outer cylinder 24, is unlikely to impinge directly on the sensor element 2 built in the inner cylinder 21.