Separable hub post of pen needle
View Patent ↗A pen needle ( 101 ) for use with a drug delivery device ( 100 ) includes a hub body ( 113 ) having internal threads ( 216 ) to receive the drug delivery device ( 100 ). A post ( 121 ) is connected to the hub body ( 113 ). A needle ( 103 ) is rigidly fixed to the post ( 121 ). The post ( 121 ) is separable from the hub body ( 113 ) such that the needle ( 103 ) is removed with the post ( 121 ). The fluid path is not disturbed by such removal because the entire needle ( 103 ) is removed with the post ( 121 ). Removal of only the post ( 121 ) and needle ( 103 ) reduces the volume of waste required for disposal, thereby increasing the effective capacity of a sharps container.
1. A pen needle for use with a drug delivery device, comprising:
a hub body having internal threads to receive the drug delivery device, said hub body having a projection extending outwardly proximally from said hub body and integrally formed with said hub body as a one piece member, the hub having a passageway that extends through the entire projection;
a post removably connected to said projection within said passageway in said hub; and
a needle rigidly fixed to said post; and
a first flange at a patient end of the post spaced axially from the projection;
a second flange on said post axially spaced towards a non-patient end from said first flange and having a diameter larger than the passageway to prevent insertion of the post into the projection past the second flange; and
a flexible tab disposed at the non-patient end of said post and extending past a non-patient end of the projection and out of the passageway to prevent accidental withdrawal of said post from said projection,
wherein said post is separable from said hub body such that said needle is removed in its entirety with said post;
wherein an entire length of said passageway is the same as a length of said post from said second flange to said flexible tab.
2. The pen needle according to claim 1 , wherein
said hub body has a base and a wall extending outwardly therefrom, and said projection extends from said base in a direction opposite to said wall.
3. The pen needle according to claim 1 , wherein said flexible tab has a width larger than that of said passageway.
4. The pen needle according to claim 3 , wherein
said flexible tab compresses to allow removal of said post from said projection.
5. The pen needle according to claim 1 , wherein
said second flange has a width larger than that of said passageway to limit insertion of said post in said projection.
6. The pen needle according to claim 1 , wherein
said post is removed from said projection in its entirety.
7. The pen needle according to claim 1 , wherein
said second flange is connected to said post to facilitate removal of said post from said projection.
8. The pen needle according to claim 1 , wherein
when said post is located within said passageway said second flange contacts a patient end surface of said projection and said flexible tab contacts a non-patient end surface of said projection.