公开(公告)号：US20160303332A1

公开(公告)日：2016-10-20

申请号：US15099064

申请日：2016-04-14

Applicant: NIPRO CORPORATION

Inventor： Yoshiharu IWASE ,  Yutaka EIZUMI ,  Isao SASAKI

IPC: A61M5/32 ,  A61L31/14 ,  A61L31/02

CPC classification number: A61M5/3286 ,  A61L31/022 ,  A61L31/14 ,  A61M5/329 ,  A61M2207/00 ,  F04C2270/0421

Abstract: An injection needle 1 made of an alloy containing cobalt and molybdenum is manufactured as follows. First, a lancet cut is carried out to a pipe-like metallic material composed of the alloy containing cobalt and molybdenum to form a blade tip 3 and a blade part 5. Then, a distal end part 1A including the blade tip 3 is mechanically polished, and thereafter, the distal end part 1A is immersed in an electrolytic solution and electrolytically polished. Thus, burrs at the blade tip 3 or the like generated during mechanical polishing are removed. Since the injection needle 1 is composed of the alloy containing cobalt and molybdenum, compared to a conventional injection needle made of stainless steel, an injection needle in which the surface roughness of an inner peripheral surface of the injection needle is low and smooth can be provided.

Abstract translation: 如下制造由含有钴和钼的合金制成的注射针1。 首先，对由含有钴和钼的合金构成的管状金属材料进行刺血针切割，以形成刀片尖端3和刀片部分5.然后，将包括刀尖3的前端部1A机械抛光 然后将前端部1A浸渍在电解液中进行电解抛光。 因此，在机械抛光期间产生的叶片尖端3等处的毛刺被去除。 由于注射针1由含有钴和钼的合金构成，所以与现有的不锈钢注射针相比，可以提供注射针的内周面的表面粗糙度低且平滑的注射针 。

公开(公告)号：US20240392465A1

公开(公告)日：2024-11-28

申请号：US18694584

申请日：2022-09-22

Applicant: NIPRO CORPORATION

Inventor： Daisuke KIMURA ,  Yutaka EIZUMI ,  Kenji KUROKAWA ,  Masato KANEKO

IPC: C25F7/00 ,  C25F3/24

Abstract: Provided is a novel manufacturing method for a conical hollow needle that makes it possible to efficiently form a conical part that has a nearly perfectly circular outer circumferential surface shape. The present invention is a method of manufacturing a conical hollow needle that has a conical part that has a tapered outer circumferential surface. The manufacturing method involves immersing a hollow needle having a straight shape in an electrolyte solution to conically electropolish an outer circumferential surface. From a start to an end of the electropolishing, the hollow needle, which serves as an anode, is sandwiched between a pair of cathodes at a prescribed distance therefrom in a radial direction, and the hollow needle is rotated around a needle axis thereof to change which faces of the hollow needle are opposite to the cathodes.