Abstract: A spherical annular base member 33 is constructed such that a heat-resistant material 6 and a reinforcing member 5 are compressed and intertwined with each other so as to be provided with structural integrity. In an outer layer 34, a heat-resistant material 6, a solid lubricant constituted of a lubricating composition, and a reinforcing member 5 made from a metal wire net are compressed such that the solid lubricant and the heat-resistant material 6 are filled in meshes of the metal wire net of the reinforcing member 5, and the solid lubricant, the heat-resistant material 6, and the reinforcing member 5 are integrally formed in mixed form. An outer surface 36 of the outer layer 34 is formed into a smooth surface 39 in which a surface 37 constituted of the reinforcing member 5 and a surface 38 constituted by the solid lubricant are present in mixed form.

Abstract: 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.

Abstract: A spherical annular seal member 28 includes a spherical annular base member 27 defined by a cylindrical inner surface 23, a partially convex spherical outer surface 24, and large- and small-diameter-side annular end faces 25 and 26 of the partially convex spherical outer surface 24, as well as an expandable annular coating layer 29 formed integrally on the cylindrical inner surface 23 of the spherical annular base member 27. The coating layer 29 consists of a mixture of acid-treated graphite and wax.

Abstract: A spherical annular base member 33 is constructed such that a heat-resistant material 6 and a reinforcing member 5 are compressed and intertwined with each other so as to be provided with structural integrity. In an outer layer 34, a heat-resistant material 6, a solid lubricant constituted of a lubricating composition, and a reinforcing member 5 made from a metal wire net are compressed such that the solid lubricant and the heat-resistant material 6 are filled in meshes of the metal wire net of the reinforcing member 5, and the solid lubricant, the heat-resistant material 6, and the reinforcing member 5 are integrally formed in mixed form. An outer surface 36 of the outer layer 34 is formed into a smooth surface 39 in which a surface 37 constituted of the reinforcing member 5 and a surface 38 constituted by the solid lubricant are present in mixed form.

Abstract: A spherical annular seal member (1) has a seal body (4) in which a heat-resistant material (2) and a reinforcing member (3) made of a metal wire have been compressed to fill meshes of the metal wire net of the reinforcing member (3) with the heat-resistant material (2) such that the heat-resistant material (2) and the reinforcing member (3) are integrally formed in mixed form. The seal body (4) has a cylindrical inner peripheral surface (6) defining a through hole (5); an outer peripheral surface (10) constituted by a partially convex spherical surface (7); and annular end faces (8, 9) respectively provided on a large-diameter side and a small-diameter side of the partially convex spherical surface (7). In the seal body (4), the reinforcing member (3) and the heat-resistant material (2) are respectively contained at a rate of 15 to 80 wt. % and at a rate of 20 to 85 wt. %. The heat-resistant material (2) in the seal body (4) has a density of 1.20 g/cm3 to 2.00 g/cm3.

Abstract: A spherical annular seal member (1) has a seal body (4) in which a heat-resistant material (2) and a reinforcing member (3) made of a metal wire have been compressed to fill meshes of the metal wire net of the reinforcing member (3) with the heat-resistant material (2) such that the heat-resistant material (2) and the reinforcing member (3) are integrally formed in mixed form. The seal body (4) has a cylindrical inner peripheral surface (6) defining a through hole (5); an outer peripheral surface (10) constituted by a partially convex spherical surface (7); and annular end faces (8, 9) respectively provided on a large-diameter side and a small-diameter side of the partially convex spherical surface (7). In the seal body (4), the reinforcing member (3) and the heat-resistant material (2) are respectively contained at a rate of 15 to 80 wt. % and at a rate of 20 to 85 wt. %. The heat-resistant material (2) in the seal body (4) has a density of 1.20 g/cm3 to 2.00 g/cm3.

Abstract: In the inner portion of a spherical annular seal member (55) extending from a cylindrical inner surface (52) to an outer surface (53) formed in the shape of a partially convex spherical surface, a heat-resistant sheet member (3) having a heat-resistant coating (2) on overall surfaces of a heat-resistant sheet and a reinforcing member (9) constituted by a metal wire net (8) are compressed and intertwined with each other, and are thus arranged to be provided with structural integrality. The outer surface (53) formed in the shape of the partially convex spherical surface is constituted by an exposed surface of an outer surface layer (56) formed of the heat-resistant coating (2), and the reinforcing member (9) constituted by the metal wire net (8) formed integrally with the outer surface layer (56) is disposed in the outer surface layer (56).

Abstract: A spherical annular seal member which has a cylindrical inner surface defining a through hole in a central portion thereof, an outer surface formed in the shape of a partially convex spherical surface, and an annular end face on a large-diameter side of the outer surface, and which is used particularly in an exhaust pipe joint, comprises: a reinforcing member made from a compressed metal wire net; a heat-resistant material filling meshes of the metal wire net of the reinforcing member and compressed in such a manner as to be formed integrally with the reinforcing member in mixed form, the heat-resistant material and the reinforcing member being provided as principal components in an inner portion of the spherical annular seal member which extends from the cylindrical inner surface to the outer surface formed in the shape of the partially convex spherical surface, boron carbide, a metal boride, a metal fluoride, graphite, and aluminum phosphate being also formed integrally with the reinforcing member and the h

Abstract: A spherical annular seal having a through hole in a center thereof and a partially convex spherical surface portion on an outer surface thereof, wherein an inner peripheral surface of the spherical annular seal defining the through hole is reinforced by a reinforcing member formed of a metal mesh, and a uniform lubricating sliding layer of a lubricating composition containing 70 to 90 wt. % of boron nitride and 10 to 30 wt. % of alumina is formed on a surface of the partially convex spherical surface portion.

Abstract: A spherical annular seal having a through hole in a center thereof and a partially convex spherical surface portion on an outer surface thereof, wherein a surface of the partially convex spherical surface portion is formed into a smooth surface in which a lubricating sliding layer of a lubricating composition containing 70 to 90 wt. % of boron nitride and 10 to 30 wt. % of alumina and/or silica and a reinforcing material constituted by a metal wire net covering the lubricating sliding layer and integrated with the lubricating sliding layer are integrated in mixed form.

Abstract: A spherical annular seal having a through hole in a center thereof and a partially convex spherical surface portion on an outer surface thereof, wherein an inner peripheral surface of the spherical annular seal defining the through hole is reinforced by a reinforcing member formed of a metal mesh, and a uniform lubricating sliding layer of a lubricating composition containing 70 to 90 wt. % of boron nitride and 10 to 30 wt. % of alumina is formed on a surface of the partially convex spherical surface portion.