US 11,717,618 B2
Medicinal fluid delivery devices and associates methods for advancing and retracting needles
Kathleen Carroll, Durham, NC (US); Ru-Rong Ji, Durham, NC (US); Linda Gray-Leithe, Durham, NC (US); Timothy Amrhein, Durham, NC (US); and Shivanand Lad, Durham, NC (US)
Assigned to Duke University, Durham, NC (US)
Filed by Duke University, Durham, NC (US)
Filed on Jan. 29, 2020, as Appl. No. 16/775,750.
Claims priority of provisional application 62/798,033, filed on Jan. 29, 2019.
Prior Publication US 2020/0238019 A1, Jul. 30, 2020
Int. Cl. A61M 5/32 (2006.01); A61M 5/31 (2006.01); A61M 5/315 (2006.01)
CPC A61M 5/3221 (2013.01) [A61M 5/3134 (2013.01); A61M 5/3135 (2013.01); A61M 5/31565 (2013.01); A61M 5/3245 (2013.01); A61M 2205/0266 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A medicinal fluid delivery device comprising:
a tube including a first opening and a second opening, the tube defining an interior space that extends between the first opening and the second opening, and the interior space having an interior wall;
a needle being at least partially positioned within the interior space of the tube, wherein the needle comprises a proximal end and a distal end that substantially align in a first direction, wherein a portion of the distal end is biased to extend in a second direction that is different than the first direction; and
a mechanism comprising a needle engagement portion attached to the proximal end of the needle and configured to position the distal end between a first position and a second position, wherein the needle engagement portion defines ridges that form a channel therebetween, wherein the channel mechanically engages the proximal end of the needle, wherein in the first position the portion of the distal end is constrained by the interior wall such that it does not extend in the second direction, and wherein in the second position the portion of the distal end is not constrained by the interior wall such that it extends in the second direction.