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Surface hardened injection needle and method of producing such

A technology of injection needle and surface layer, applied in the field of injection needle, can solve problems such as limiting the degree of hardness change

Inactive Publication Date: 2018-02-16
NOVO NORDISK AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While hypodermic needles are actually roughly mentioned as exemplary types of articles undergoing the disclosed process steps, the linear nature of the soaking process appears to severely limit the degree of hardness variation obtainable through thin-walled such specimens.

Method used

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  • Surface hardened injection needle and method of producing such
  • Surface hardened injection needle and method of producing such
  • Surface hardened injection needle and method of producing such

Examples

Experimental program
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Embodiment Construction

[0049] When using expressions such as "upper" and "lower" in the following related expressions, these expressions refer to the drawings and not necessarily to the actual situation of use. The shown figures are schematic diagrams, for which reason the configuration of the different structures and their relative dimensions are intended for illustrative purposes only.

[0050] figure 1 is a longitudinal sectional view of an injection needle 1 with an elongated metal needle body 2 . The needle body 2 comprises a tubular wall 3 extending between a target end portion 4 and a container end portion 6 and defining a lumen 7 for delivering fluid. The target end portion 4 is processed to provide a sharpened tip 5 for easy and virtually painless insertion into a person's skin.

[0051] figure 2 The injection needle 1 is shown in cross section. It can be seen that the tubular wall 3 has an outer duct diameter D and the lumen 7 has a diameter d. The needle body 2 is further defined by...

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PUM

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Abstract

A medical injection needle (1) having a metallic needle body (2) comprising an axially extending wall (3), a first end portion (4), a second end portion (6), and a flow path (7) providing for fluid communication between the first end portion (4) and the second end portion (6) along the axially extending wall (3), wherein at least a portion of the metallic needle body (2) comprises a hardened surface layer (10, 20) in which carbon atoms and nitrogen atoms are deposited.

Description

technical field [0001] The present invention relates generally to medical needles and more particularly to injection needles for penetrating human skin and delivering therapeutic substances to the dermis or subcutaneously. Background technique [0002] Injection needles are widely used in the medical field to deliver medicaments to specific body parts. For example, in the field of treating diabetes, pen needles are often used with injection pens for the subcutaneous administration of various glucose regulating agents. Pen needles include injection needles and needle covers with means for attaching to injection pens. The injection needle is typically secured to a hub so as to be able to penetrate the skin through one needle end and the cartridge septum through the other needle end. [0003] Such pen needles should ideally be used only once, especially in order to minimize the risk of contamination and tissue damage caused by the needle. The latter is bound to occur when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M5/32C23C8/22C23C8/26C23C8/32C23C8/30
CPCA61M5/3286A61M5/329C23C8/02C23C8/32A61L31/022A61L31/024A61L31/028A61M2207/00
Inventor S.艾弗森J.特罗斯伯格
Owner NOVO NORDISK AS