An Injection Needle Assembly for an Injection Device and an Injection Device Comprising Such Assembly

An injection needle assembly (50) for an injection device, comprising: a) a needle cannula (3) attached to a needle hub (4) and defining a pointed tip at a free end (3a, 3b), and b) a needle cover (10, 10a, 10b) forming an axially extending elongated flexible enclosure accommodating the needle cannu...

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Hauptverfasser: True Daniel Patrick Godskesen, Benito Modesto Javier Mora, Hansen Soeren Kjellerup, Thomsen Helle Ravn
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Sprache:eng
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creator True Daniel Patrick Godskesen
Benito Modesto Javier Mora
Hansen Soeren Kjellerup
Thomsen Helle Ravn
description An injection needle assembly (50) for an injection device, comprising: a) a needle cannula (3) attached to a needle hub (4) and defining a pointed tip at a free end (3a, 3b), and b) a needle cover (10, 10a, 10b) forming an axially extending elongated flexible enclosure accommodating the needle cannula (3). The needle cover (10, 10a, 10b) is configured to axially collapse and become penetrated by the needle cannula (3) when a penetration force is applied to the needle cover. The needle cover (10, 10a, 10b) defines a shaft section (11a) and a bulb section (11b). The shaft section (11a) encircles the needle cannula (3) and extends axially from the needle hub (4) to the bulb section (11b). The shaft section (11a) comprises a collapsible wall area (15) having wall thickness t1 less than a predefined wall thickness t1,lim to provide radial deformability for abutting contact with the needle cannula (3). The bulb section (11b) comprises a wall area (17a, 17b) having a wall thickness t2 being greater than said predefined wall thickness t1,lim, and further defines a central end wall area (20) having a wall thickness t3 smaller than the wall thickness t2. In an initial non-penet-rated state, the needle cover (10, 10a, 10b) assumes a first configuration wherein the wall areas of the bulb section (11b) and the wall areas of the shaft section (11a) are spaced apart from the needle cannula (3).
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subjects DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
HUMAN NECESSITIES
HYGIENE
MEDICAL OR VETERINARY SCIENCE
title An Injection Needle Assembly for an Injection Device and an Injection Device Comprising Such Assembly
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