Metal tubular body and manufacturing method thereof
AssigneesTerumo Kabushiki Kaisha, Okano Kogyo Co., Ltd.
InventorsTetsuya Ooyauchi, Masayuki Okano
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Abstract
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.
Claims7
A metal tubular body wherein at least a part of a wall thickness of the tubular body varies along its longitudinal axis, and wherein the tubular body has a minimum inner diameter of up to 2 mm and a maximum wall thickness of up to 0.5 mm.
A method for manufacturing a metal tubular body wherein at least a part of a wall thickness of the tubular body varies along its longitudinal axis, comprising the steps of:
- punching a sheet blank in the developed shape of the tubular body from a metal sheet such that the metal sheet and the sheet blank remain partly joined, said metal sheet having at least a part of a thickness which varies in the direction of the longitudinal axis of the finished tubular body;
- pressing the sheet blank into a tubular shape;
- and
- cutting the pressed sheet blank from the metal sheet to thereby produce the tubular body.
A method for manufacturing a metal tubular body wherein at least a part of a wall thickness of the tubular body varies along its longitudinal axis, comprising the steps of:
- punching a sheet blank in the developed shape of the tubular body from a metal sheet such that the metal sheet and the sheet blank remain partly joined;
- pressing the sheet blank into a tubular shape such that the pressed sheet blank in tubular shape has at least a part of a thickness which varies along the longitudinal axis;
- and
- cutting apart the metal sheet and the sheet blank at the part where they remain joined to thereby produce the tubular body.
Dependencies are inferred from the claim text.