Patent ID: 7234341
Filing Date: 2007-06-26
Classification: G01N,Y10T

Abstract:
1. A gas sensor comprising: a to-be-held member 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 to-be-held member therein while surrounding the to-be-held member from radially outside and supporting the distal-end-side holding surface of the to-be-held member by a support surface of the stepped portion; and a first metallic packing abutting the proximal-end-side holding surface of the to-be-held member 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 to-be-held member 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 to-be-held member and the inner circumferential surface of the metallic shell, and the first packing is formed by axially pressing and plastically deforming a wire packing, which has been inserted into the clearance between the proximal-end-side holding surface of the to-be-held member and the inner circumferential surface of the metallic shell, such that the first packing has a wedge-like cross-section.