Patent ID: 9212596
Filing Date: 2015-12-15
Classification: F01N,F16J

Abstract:
1. A spherical annular seal member for use in an exhaust pipe joint, comprising: a spherical annular base member defined by a cylindrical inner surface forming a through hole, a partially convex spherical sliding surface, and annular end faces on large- and small-diameter sides of said partially convex spherical sliding surface, wherein said spherical annular base member includes a heat-resistant material containing expanded graphite and compressed and a reinforcing member made from a convoluted and compressed metal wire net sheet, said heat-resistant material containing expanded graphite fills meshes of the compressed metal wire net sheet and is integrated with the metal wire net sheet in mixed form, and the metal wire net sheet which extends along at least one annular end face of said large- and small-diameter side annular end faces and is exposed to an outside partially and discretely at said one annular end face is constituted by a bent extended portion of an innermost circumferential metal wire net sheet extending along said cylindrical inner surface.