| US 7,506,534 B2 | ||
| Gas sensor and method of manufacturing the gas sensor | ||
| Hisaharu Nishio, Nagoya (Japan); Takashi Nakao, Nagoya (Japan); and Kazuhiro Kouzaki, Nagoya (Japan) | ||
| Assigned to NGK Spark Plug Co., Ltd., Aichi (Japan) | ||
| Filed on May 18, 2007, as Appl. No. 11/798,959. | ||
| Application 11/798959 is a continuation of application No. 10/564354, granted, now 7,234,341, previously published as PCT/JP2004/009971, filed on Jul. 13, 2004. | ||
| Claims priority of application No. 2003-198557 (JP), filed on Jul. 17, 2003. | ||
| Prior Publication US 2007/0227229 A1, Oct. 04, 2007 | ||
| Int. Cl. G01N 27/407 (2006.01) | ||
| U.S. Cl. 73—31.05 [73/23.31] | 7 Claims |
| 1. A gas sensor comprising:
an element holder including a distal-end-side holding surface and a proximal-end-side holding surface located on the proximal
end side with respect to the distal-end-side holding surface;
a tubular metallic shell including a stepped portion projecting radially inward from its inner circumferential surface, and
adapted to hold the element holder therein while surrounding the element holder from radially outside and supporting the distal-end-side
holding surface of the element holder by a support surface of the stepped portion; and
a first metallic packing abutting the proximal-end-side holding surface of the element holder and the inner circumferential
surface of the metallic shell, wherein
the first packing is disposed in an acute-angle clearance formed between the proximal-end-side holding surface of the element
holder and the inner circumferential surface of the metallic shell such that the first packing has a wedge-like cross section
and is pressed against the proximal-end-side holding surface of the element holder and the inner circumferential surface of
the metallic shell, and
a gas detection element extending along the axial direction, wherein the element holder has an opening through which the gas
detection element is passed extending from the proximal-end-side holding surface to the distal-end-side holding surface of
the element holder.
|