Oiles Corporation

Toyo Tanso Co., Ltd.

Toshihiko Shimura

Kouhei Kurose

Shuichi Kubota

Yoshikazu Sakairi

Takeshi Furukido

Osamu Miyashita

Tomoyuki Inagaki

Masao Tomomatsu

Toshiki Kusuyama

Hideki Toyo Tanso Co Ltd Inomoto

Hideaki Toyo Tanso Co Ltd Kakimi

A spherical annular seal memberfor use in an exhaust pipe joint includes: a spherical annular base memberdefined by a cylindrical inner surface, a partially convex spherical surface, and large- and small-diameter side annular end facesandof the partially convex spherical surface; and an outer layerformed integrally on the partially convex spherical surfaceof the spherical annular base member

Spherical annular seal member

A spherical annular seal member includes a spherical annular base member defined by a cylindrical inner surface, a partially convex spherical outer surface, and large- and small-diameter-side annular end faces and of the partially convex spherical outer surface, as well as an expandable annular coating layer formed integrally on the cylindrical inner surface of the spherical annular base member. The coating layer consists of a mixture of acid-treated graphite and wax.

Spherical annular seal member, exhaust pipe joint device using the same, and method of manufacturing spherical annular seal member

A spherical annular seal memberhas a cylindrical inner surfacedefining a through holein a central portion thereof, an outer surfaceformed in the shape of a partially convex spherical surface, and an annular end faceon a large-diameter side of the outer surface. In its inner portion extending from the cylindrical inner surfaceto the outer surfaceformed in the shape of the partially convex spherical surface, the spherical annular seal memberhas a reinforcing membermade from a compressed metal wire net, as well as a heat-resistant material, which contains expanded graphite, phosphorus pentoxide, and a phosphate, fills meshes of the metal wire netof the reinforcing member, and is compressed in such a manner as to be formed integrally with the reinforcing memberin mixed form. The outer surfaceformed in the shape of the partially convex spherical surface is formed into a smooth surface where an outer surface layer of the heat-resistant material containing expanded graphite, phosphorus pentoxide, and the phosphate and the reinforcing membermade from the metal wire netand formed integrally with the outer surface layer in mixed form are exposed.

Spherical annular seal member and method of manufacturing the same

Growing community of inventors

Fujisawa, Japan

Toshihiko Shimura