Terumo Kabushiki Kaisha

Okano Kogyo Co., Ltd.

Other

Hino Motors, Ltd.

Masayuki Okano

Tetsuya Ooyauchi

Takashi Ishimori

A method for manufacturing a flat pipewith concave-convex shapes on inner and outer surfaces includes making incisions with an expanded shape of the flat pipein a metal thin platesuch that intermediate portions(middle portions) in the expanded shape of the flat pipewidthwise of the expanded shape are left uncut from the thin plate, machining the concave-convex shapes in a range of the expanded shape of the flat pipeand raising the expanded shape of the flat pipefrom the thin plateas cut-and-raised pieceswith the uncut intermediate portionsin between, closing tips of the cut-and-raised piecestogether to form an overall shape of the flat pipe, and separating the uncut intermediate portionsfrom the thin plateto obtain the flat pipe

Method for manufacturing flat pipe

Side hole-bearing tubular bodies made of metal and having an inside diameter of up to 2 mm are manufactured by a method which includes punching from a metal sheet a sheet blank in the developed shape of a tubular body and punching in the sheet blank a hole which corresponds to the side hole in the tubular body and/or notches which form the side hole when the sheet blank is pressed into a tubular shape, in such a way that the metal sheet and the sheet blank remain partly joined; pressing the sheet blank into a tubular shape; and cutting apart the metal sheet and the sheet blank where they remain joined. Metal tubular bodies manufactured in this way can have one or more side holes of any shape, position or number thereon, and are highly suitable for use in medical devices such as syringe needles.

Metal tubular body and manufacturing method thereof

A small diameter metal tube whose inner surface is smooth and its production method are provided. The metal tube has an inner diameter of up to 1.0 mm and its inner surface has a maximum height difference (Rf) in the surface roughness of up to 3 &#x3bc;m.

Method for producing a metal tube

A small diameter metal tube having at least two inner diameters is provided. A method for producing this metal tube is also provided. In this method, a plate member having a development shape of the metal tube is blanked from a metal thin plate so that the plate member is left partly tied to the metal thin plate, the plate member is press formed into a tubular body having the at least two inner diameters, and the plate member partly tied to the metal thin plate is cut apart to produce the metal tube having at least two inner diameters.

Metal tube and its production method

Side hole-bearing tubular bodies made of metal and having an inside diameter of up to 2 mm are manufactured by a method which includes punching from a metal sheet a sheet blank in the developed shape of a tubular body and punching in the sheet blank a hole which corresponds to the side hole in the tubular body and/or notches which form the side hole when the sheet blank is pressed into, a tubular shape, in such a way that the metal sheet and the sheet blank remain partly joined; pressing the sheet blank into a tubular shape; and cutting apart the metal sheet and the sheet blank where they remain joined. Metal tubular bodies manufactured in this way can have one or more side holes of any shape, position or number thereon, and are highly suitable for use in medical devices such as syringe needles.

A metal tubular body of small diameter having a varying wall thickness is provided. The tubular body has a minimum inner diameter of up to 2 mm and a maximum wall thickness of up to 0.5 mm, and the wall thickness varies along its longitudinal axis.

Growing community of inventors

Tokyo, Japan

Masayuki Okano