Terumo Kabushiki Kaisha

Okano Kogyo Co., Ltd.

Other

Tetsuya Ooyauchi

Hideo Kawamoto

Daisuke Nishiuchi

Masayuki Okano

Teruyuki Yatabe

Yukio Imai

Hidenori Fujiwara

Ayumi Kumagai

Kenta Gotou

Madoka Horie

Mieko Ueda

A medical hollow needle assembly includes an outer cylindrical body including a through-hole; a hollow needle having an outer peripheral surface, wherein a proximal portion of the hollow needle is disposed in the through-hole of the outer cylindrical body, and wherein the outer peripheral surface of the hollow needle has an outer reduced-diameter surface that has a smaller outer diameter than that of a more proximal portion of the outer peripheral surface of the hollow needle; and an inner cylindrical body including an insertion hole in which the hollow needle is disposed, wherein the inner cylindrical body is disposed between the hollow needle and an inner peripheral surface of the through-hole of the outer cylindrical body, and wherein the inner cylindrical body joins the outer cylindrical body and the hollow needle.

Medical hollow needle assembly and method of manufacturing hollow needle

A drug injection needle comprises a puncturing needle part that has a puncturing part that is capable of puncturing a body, a drug introducing needle part that is capable of communicating with the inside of the drug container, and a housing that supports the puncturing needle part and the drug introducing needle part in such a way as to allow the liquid drug to flow between the needle parts. The outer diameter of the puncturing part is not more than 0.254 mm. The outer diameter of the drug introducing needle part is larger than at least that of the vicinity of the distal end of the puncturing part of the puncturing needle part, and a cutting edge is formed at the end of the drug introducing needle part for penetrating through an elastic member that is provided to seal the drug injection port of the drug container.

Injection needle and injection apparatus

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

An injection needle that can reduce the pain associated with piercing a patient's skin with a needle. The needle has a needle tip provided by forming at least two or more ground surfaces after a first ground surface is formed at the tip of a needle tube. The needle tip is not present on a central plane, which is the plane that crosses vertically the first ground surface and includes a central axis of the needle tube.

Injection needle with needle point offset from central plane

A liquid injection needle () includes a hollow needle part () for injecting a liquid () and a supporting part (), to which the needle part () is fixed. The needle part () includes an anchoring part () that extends through the inside of the supporting part () and a puncturing part () that extends from the supporting part () for making a puncture in a living body. The puncturing part () has a distal side outer diameter equal to or greater than 0.1 mm and equal to or less than 0.25 mm, and a proximal side outer diameter than the distal side outer diameter.

Liquid injection needle and liquid injection device

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 drug injection needle comprises a puncturing needle part having a puncturing part capable of puncturing a body, a drug introducing needle part capable of communicating with the inside of the drug container, and a housing supporting the puncturing needle part and the drug introducing needle part to allow the liquid drug to flow between the needle parts. The outer diameter of the puncturing part is not more than 0.254 mm. The outer diameter of the drug introducing needle part is larger than at least that of the vicinity of the distal end of the puncturing part of the puncturing needle part, and a cutting edge is formed at the end of the drug introducing needle part for penetrating through an elastic member that is provided to seal the drug injection port of the drug container.

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

Kanagawa, Japan

Tetsuya Ooyauchi