| US 7,575,663 B2 | ||
| Gas sensor | ||
| Satoshi Nakamura, Okazaki (Japan); Takashi Kojima, Kasugai (Japan); and Daisuke Makino, Ichinomiya (Japan) | ||
| Assigned to Denso Corporation, Kariya (Japan); and Nippon Soken, Inc., Nishio (Japan) | ||
| Filed on Jul. 15, 2004, as Appl. No. 10/891,188. | ||
| Application 10/891188 is a division of application No. 10/175090, filed on Jun. 20, 2002, granted, now 6,780,298. | ||
| Claims priority of application No. 2001-187052 (JP), filed on Jun. 20, 2001; and application No. 2002-154193 (JP), filed on May 28, 2002. | ||
| Prior Publication US 2004/0244472 A1, Dec. 09, 2004 | ||
| Int. Cl. G01N 27/407 (2006.01) | ||
| U.S. Cl. 204—428 [204/424] | 5 Claims |
| 1. A gas sensor comprising a gas sensor element and a cylindrical housing for inserting and fixing said gas sensor element,
measured gas side covers having a bottom and provided on a top end side of said housing and an atmosphere side cover provided
on a base end side, wherein
said measured gas side covers comprise an inner cover for directly covering the gas sensor element and an outer cover directly
exposed to measured gas ambience, and are provided with a measured gas room inside said inner cover,
gas passage holes for leading a measured gas into said measured gas room are provided on side surfaces of said inner cover
and said outer cover respectively, and the gas passage hole provided on said outer cover is disposed in a position much closer
to a top end side than the gas passage hole provided closest to the top end side in said inner cover; and
partitions disposed to extend in an axial direction of the gas sensor are provided between said outer cover and said inner
cover, each of said partitions being formed by a concavity provided on the side surface of said outer cover in such a manner
that said concavity is projecting radially inwardly, each of said partitions having an axial length which is equal to or greater
than an axial length of said gas passage hole provided on said side surface of said outer cover,
wherein each said partition is disposed between two adjacent gas passage holes of said outer cover.
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