Abstract: To reduce a shaft insertion load and prevent extrusion of a seal ring to the low pressure side, a sealing device has a seal ring in an installation groove formed on a shaft to have a tapered groove bottom section and a backup ring having a tapered section corresponding to the tapered groove bottom section, a gap is provided between a side wall surface at the low-pressure side of the mounting groove and a side end surface of the backup ring, a peripheral surface of the backup ring at the opposite side of the tapered section has a tapered surface which comes closer to a peripheral surface of a housing at the low-pressure side, and the tapered section is formed to have a two-staged taper.

Abstract: To reduce a shaft insertion load and ensure a sealing function, a carbon dioxide gas sealing device has a seal ring provided in a mounting groove having a tapered groove bottom, a backup ring having a tapered portion corresponding to the tapered groove bottom, and a gap provided between the side wall surface at the low pressure side of the mounting groove and a side end surface at the lower pressure side of the backup ring, a tapered surface that approaches the peripheral surface of a housing from the side end surface on the high pressure side toward the lower pressure side is provided on the peripheral surface on the side opposite to the tapered portion and the tapered portion has two-stage tapers.

Abstract: To reduce a shaft insertion load and prevent extrusion of a seal ring to the low pressure side, a sealing device (1) has a seal ring (20) in an installation groove (10) formed on a shaft (2) to have a tapered groove bottom section (12) and a backup ring (30) having a tapered section (35) corresponding to the tapered groove bottom section (12), a gap (g) is provided between a side wall surface (11) at the low-pressure side (L) of the mounting groove (10) and a side end surface (32) of the backup ring (30), a peripheral surface (34) of the backup ring (30) at the opposite side of the tapered section (35) has a tapered surface (36) which comes closer to a peripheral surface (3a) of a housing (3) at the low-pressure side (L), and the tapered section (35) is formed to have a two-staged taper.

Abstract: To reduce a shaft insertion load and ensure a sealing function, a carbon dioxide gas sealing device (1) comprises a seal ring (20) provided in a mounting groove (10) having a tapered groove bottom (12), a backup ring (30) having a tapered portion (35) corresponding to the tapered groove bottom (12), and a gap (g) provided between the side wall surface (11) at the low pressure side (L) of the mounting groove (10) and a side end surface (32) at the lower pressure side (L) of the backup ring (30), a tapered surface (36) that approaches the peripheral surface (3a) of a housing (3) from the side end surface (31) on the high pressure side H toward the lower pressure side L is provided on the peripheral surface (34) on the side opposite to the tapered portion (35) and the tapered portion (35) has two-stage tapers.

Abstract: A waterproof gasket that ensures easy handling and maintains desirable sealing capability between two members of a resin material made housing of a mobile phone, the waterproof gasket being in contact with the members, is provided. The waterproof gasket to be fitted between the members as constituents of the electronic appliance housing comprises a gasket main body made of a rubbery elastic material and a surface layer resulting from treatment of the surface of the gasket main body with a reactive surface treating agent.

Abstract: A seal molding material for cell electrolytic solution, which comprises an EPDM composition comprising a peroxide-crosslinkable EPDM and an organic peroxide, the seal molding material being for use at the electrode site of a nickel-hydrogen cell, wherein the EPDM composition comprises preferably 100 parts by weight of a peroxide-crosslinkable EPDM, 10 to 150 parts by weight of a filler and 1 to 8 parts by weight of an organic peroxide, and not more than 40 parts by weight of hydrocarbon-based oil can be further contained. The seal material molded from the seal molding material for cell electrolytic solution has a sufficient durability against a potassium hydroxide-based electrolytic solution and a longer life, and is free from any deterioration, when energized at the electrode site of a nickel-hydrogen cell.

Abstract: A seal molding material for cell electrolytic solution, which comprises an EPDM composition comprising a peroxide-crosslinkable EPDM and an organic peroxide, the seal molding material being for use at the electrode site of a nickel-hydrogen cell, wherein the EPDM composition comprises preferably 100 parts by weight of a peroxide-crosslinkable EPDM, 10 to 150 parts by weight of a filler and 1 to 8 parts by weight of an organic peroxide, and not more than 40 parts by weight of hydrocarbon-based oil can be further contained. The seal material molded from the seal molding material for cell electrolytic solution has a sufficient durability against a potassium hydroxide-based electrolytic solution and a longer life, and is free from any deterioration, when energized at the electrode site of a nickel-hydrogen cell.

Abstract: A pipe connector device able to simply and effectively seal connected members even when using a seal member through which a gas easily permeates is provided. A connector device 1 provides flow paths 7a and 9a for carrying a pressurized gas, is formed by first and second connection members 7 and 9 connected to each other, an O-ring 11 for sealing sealing surfaces S1 and S2 of the connection members 7 and 9, and a material more resistant to permeation of gas through it than the O-ring 11, and has a backup ring 13 having a support surface 13S for supporting the O-ring 11 receiving a pressure difference between the insides and outsides of the connection members 7 and 9 and a tapered surface 19T on which a distance between the sealing surfaces S1 and S2 at a fit position of the backup ring 13 gradually decreases toward a non gas pressurization side.

Abstract: A seal molding material for cell electrolytic solution, which comprises an EPDM composition comprising a peroxide-crosslinkable EPDM and an organic peroxide, the seal molding material being for use at the electrode site of a nickel-hydrogen cell, wherein the EPDM composition comprises preferably 100 parts by weight of a peroxide-crosslinkable EPDM, 10 to 150 parts by weight of a filler and 1 to 8 parts by weight of an organic peroxide, and not more than 40 parts by weight of hydrocarbon-based oil can be further contained. The seal material molded from the seal molding material for cell electrolytic solution has a sufficient durability against a potassium hydroxide-based electrolytic solution and a longer life, and is free from any deterioration, when energized at the electrode site of a nickel-hydrogen cell.