US Patent 7607340 Gas sensor

Patent 7607340 was granted and assigned to NGK SPARK PLUG CO on October, 2009 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

NGK SPARK PLUG CO

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

76073400

Patent Inventor Names

Takashi Nakashima0

Yuichi Yamada0

Date of Patent

October 27, 2009

Patent Application Number

118328550

Date Filed

August 2, 2007

Patent Primary Examiner

Hezron Williams

Patent abstract

In a protector (100) for protecting a detecting portion (11) of a sensor element (10) of a gas sensor (1), the opening area of individual inner introduction holes (130) and (140) formed in an inner protector (120) is 3.5 mm2 or less. In this manner, the amount and size of water droplets able to pass through the inner introduction holes (130) and (140) and to adhere to the sensor element (10) is restricted. In order to ensure good gas replaceability between the interior and the exterior of the inner protector (120) so as to attain quick gas response, the total opening area of the inner introduction holes (130) and (140) is 10 mm2 or more.