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AssigneeCanon Kabushiki Kaisha
InventorsTOSHITERU YAMASAKI, KOJI FUJINAKA, AKIRA SUZUKI, NOBUHARU HOSHI, JUNICHI MATSUMURA
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In a catheter in which a cylindrical member 11 is assembled to an outer periphery of a tube 10 by laser welding, an outer diameter R1 of the tube 10 at a portion P1 where the cylindrical member 11 is assembled is different from an outer diameter R2 of the tube 10 at a portion P2 where the cylindrical member 11 is not assembled (R1>R2), and the outer diameter R2 of the tube 10 at the portion P2 where the cylindrical member 11 is not assembled is smaller than an inner diameter r≈R1 of the cylindrical member 11. When the catheter is manufactured, the cylindrical member 11 is temporarily assembled to the outer periphery of the tube 10, air is injected into the tube 10 to bring the tube 10 into close contact with the cylindrical member 11, and laser welding is performed.
A tube body in which a cylindrical member assembled to an outer periphery of a tube main body by laser welding, the tube body being characterized in that an outer diameter of the tube main body in a portion where the cylindrical member is assembled is different from an outer diameter of the tube main body in a portion where the cylindrical member is not assembled, and the outer diameter of the tube main body in the portion where the cylindrical member is not assembled is smaller than an inner diameter of the cylindrical member.
Dependencies are inferred from the claim text.