Medical puncture needle and method of manufacturing puncture needle
AssigneeTerumo Kabushiki Kaisha
InventorsTetsuya Oyauchi, Daisuke Nishiuchi
Life of this patent
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Abstract
A medical puncture needle includes an end portion including a needle tip; and a main body portion contiguous with the end portion, having a substantially circular cross-sectional outer shape. The end portion includes a first bevel formed by a curved surface, the bevel having an angle that gradually decreases toward the needle tip in an axial direction, in a cross-section orthogonal to the axial direction, relative to an imaginary plane that extends along an axis of the main body portion.
Claims16
A method of manufacturing a medical puncture needle comprising:
- providing a tubular body having a substantially circular cross-sectional outer shape, which comprises:
- punching a blank from a sheet member such that the blank remains partially connected to the sheet member,
- while the blank remains partially connected to the sheet member, bending the blank into a tubular shape using at least one projecting die and at least one recessed die,
- while the tubular-shaped blank remains partially connected to the sheet member, bonding a seam between adjacent edges of the tubular-shaped blank to form the tubular body, and
- separating the tubular body from the sheet member while the tubular body is temporarily fixed to a temporary fixation member that comprises adhesive tape;
- and
- forming a first bevel at an end portion of the tubular body by machining the tubular body while (i) rotating the tubular body about an axis of the tubular body in a first rotation direction, and (ii) moving the tubular body in a first direction that is inclined by a predetermined angle relative to the axis of the tubular body.
A method of manufacturing a medical puncture needle comprising:
- providing a tubular body having a substantially circular cross-sectional outer shape, which comprises:
- punching a blank from a sheet member such that the blank remains partially connected to the sheet member,
- while the blank remains partially connected to the sheet member, bending the blank into a tubular shape using at least one projecting die and at least one recessed die,
- while the tubular-shaped blank remains partially connected to the sheet member, bonding a seam between adjacent edges of the tubular-shaped blank to form the tubular body, and
- separating the tubular body from the sheet member while the tubular body is temporarily fixed to a temporary fixation member;
- gripping the tubular body with a grip portion;
- removing the temporary fixation member from at least one end of the tubular body;
- and
- while the tubular body is held by the grip portion, forming a first bevel at an end portion of the tubular body by machining the tubular body while (i) rotating the tubular body about an axis of the tubular body in a first rotation direction, and (ii) moving the tubular body in a first direction that is inclined by a predetermined angle relative to the axis of the tubular body.
Dependencies are inferred from the claim text.