Adjustable injection length pen needle
First Claim
1. A pen needle assembly comprising:
- a hub having an outer surface with a groove and a double-ended cannula having a distal point;
an extender movably mounted on said hub between a plurality of positions, said extender including an inner surface with a protrusion that travels in said groove as said extender moves between said plurality of position, wherein at each position said extender covers a predetermined portion of said cannula; and
means for moving said extender on said hub between said plurality of positions.
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Abstract
A pen needle of the present invention includes an extender that is rotatably attached to a hub on the pen needle to set the pen needle to a desired injection length. The extender is rotated into multiple predefined positions using a shield that is removably mounted on the pen needle. Each predefined position for the extender corresponds to a predetermined injection length for the pen needle such that the extender covers a section of the pen needle not being used for the injection. After the shield has been used to rotate the extender into one of the predefined positions the shield is removed from the pen needle to expose the distal point of the pen needle so that the injection can be performed.
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Citations
9 Claims
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1. A pen needle assembly comprising:
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a hub having an outer surface with a groove and a double-ended cannula having a distal point; an extender movably mounted on said hub between a plurality of positions, said extender including an inner surface with a protrusion that travels in said groove as said extender moves between said plurality of position, wherein at each position said extender covers a predetermined portion of said cannula; and means for moving said extender on said hub between said plurality of positions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification