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Publication Number
US-11684727-B2
Publication Date
2023-06-27
Expiration Date
Abstract
A pen needle (30, 110) is disclosed for coupling to a delivery device (10) and piercing a septum on the delivery device. The pen needle includes a collar (32, 112) having a side wall (36, 116), an open proximal end (38), and a distal end (40, 118) having a coupling member (50). The pen needle also includes a needle hub (34, 114) having a proximal end (50, 124) and a distal end (58, 126), where the proximal end of the needle hub has a coupling member coupled to the distal end of the collar. The needle hub rotates independently of the collar. A needle (52) extends from the distal end of the needle hub, and a projection (76, 126) extends from the proximal end of the needle hub for piercing a septum (106) of a delivery device. The collar (32, 112) rotates independently from the needle hub (34, 114) so that the collar screws onto the threaded end of the delivery device while the needle hub does not rotate and the projection advances to pierce the septum (106) without rotating.
Core Innovation
The invention describes a pen needle apparatus in which a collar is rotatable independently of a needle hub. The needle hub is rotatably coupled to the distal end of the collar, and the collar is coupled to a delivery device such that axial movement and septum piercing are carried out while the needle hub remains rotationally fixed relative to the septum-piercing projection/spike.
A projection/spike is configured for piercing a septum of a delivery device and is integrally formed with the needle hub. The projection extends axially from the proximal end of the needle hub and includes a lumen receiving the needle, where the projection has an opening providing fluid communication between the delivery device and the needle.
Two structural coupling approaches are described. In one approach, the collar and needle hub are coupled using annular flanges/recesses so the collar can rotate while the needle hub/projection remains rotationally fixed, with an integrally formed spike projection having beveled faces and an inlet opening spaced from a pointed tip. In another approach, the collar and hub are coupled using an outward flange and flexible outwardly projecting tabs forming an annular recess, again allowing collar rotation to drive axial movement of the non-rotating hub/projection for septum piercing and fluid communication.
Claims Coverage
The independent claim set includes four independent claims. Across these claims, the coverage centers on independent rotation between a collar and a needle hub, and an axially extending integrally formed spike/projection for septum piercing with fluid communication to a needle via a projection lumen and an opening.
Independent collar rotation relative to needle hub
A needle hub rotatably coupled to the distal end of a collar, where the collar is rotatable independently of the needle hub.
Integrally formed axially extending septum-piercing spike projection
A projection at the proximal end of the needle hub configured for piercing a septum of a delivery device, wherein the projection is a spike integrally formed with the needle hub and extends axially from the proximal end of the needle hub.
Projection lumen and opening providing fluid communication
A projection having a lumen receiving the needle and extending from the proximal end of the needle hub, the projection configured for piercing a septum of the delivery device and having an opening providing fluid communication between the delivery device and the needle.
Flange and tab capture coupling between needle hub and collar
Where the needle hub has a side wall with an outwardly extending flange at the proximal end of the needle hub, and at least one outwardly extending tab spaced from the flange, and where the distal end of the collar is captured between the flange and the at least one tab to couple the needle hub to the collar, with the collar rotatable relative to the needle hub.
Collectively, the independent claims require independent rotational coupling between a collar and a needle hub, a spike/projection integrally formed with the needle hub that extends axially to pierce a septum, and a projection lumen and an opening that provide fluid communication between the delivery device and the needle. In the embodiments further recited in the independent claims, mechanical coupling is defined using flange and outwardly extending tabs that capture the collar distal end while permitting relative rotation.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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