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US 8,801,663 B2Granted
Protective device for an injection needle
AssigneeB. Braun Melsungen AG
InventorKevin Woehr
Life of this patent
Estimating the term…
Abstract
A protective device for an injection or infusion needle is provided comprising a needle hub at the proximal end of the needle, on whose shaft a protective member for the needle tip is displaceable, the protective member having an engaging section which engages with the needle shaft to prevent the protective member from being displaced beyond the needle tip, wherein the protective member is surrounded by a tube whose diameter is locally reduced or deformed such that the protective member is confined in the tube.
Claims18
A needle assembly comprising:
- a needle hub having a distal end attached to a proximal end of a needle having a shaft, a needle tip and a diametrical enlargement proximal of the needle tip;
- a displaceable protective member for the needle tip, the protective member disposed on the shaft of the needle and having an engaging section that engages the diametrical enlargement to prevent the protective member from being displaced beyond the needle tip in a needle protective position;
- wherein the protective member is surrounded by a tube having a locally reduced diameter by heat action at a proximal end portion of the tube such that the protective member is confined in the tube and spaced from a proximal end edge of the proximal end portion due to interference by the locally reduced diameter;
- and
- wherein in a ready position in which the protective member is spaced from the needle tip, the locally reduced diameter at the proximal end portion forms a stop to maintain a gap between the distal end of the needle hub and the protective member.
2 more elements
A needle assembly comprising:
- a needle hub having a distal end attached to a proximal end of a needle having a shaft with a needle tip and a diametrical enlargement proximal of the needle tip;
- a displaceable protective member for the needle tip, the protective member disposed on the shaft of the needle and having an engaging section on a proximal wall that engages the diametrical enlargement of the needle shaft to prevent the protective member from being displaced beyond the needle tip to prevent a needle stick injury;
- a tube having a tube body having two ends and a center section, said tube body having an interior diameter at the center section and surrounding the protective member;
- wherein the tube body has a heat activated locally reduced diameter at a proximal end portion, said locally reduced diameter defining a reduced section for confining the protective member within the center section and for maintaining a gap between a proximal end edge of the proximal end portion and the protective member;
- and
- wherein the reduced section of the tube maintains a gap between the distal end of the needle hub and the protective member.
3 more elements
Dependencies are inferred from the claim text.