US 12,403,249 B2
Microinfuser with automatic needle retraction
Richard Cronenberg, Mahwah, NJ (US)
Assigned to Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed by Becton, Dickinson and Company, Franklin Lakes, NJ (US)
Filed on Apr. 12, 2022, as Appl. No. 17/718,379.
Application 17/718,379 is a continuation of application No. 16/523,778, filed on Jul. 26, 2019, granted, now 11,364,336.
Application 16/523,778 is a continuation of application No. 14/391,666, granted, now 10,406,280, issued on Sep. 10, 2019, previously published as PCT/US2013/035925, filed on Apr. 10, 2013.
Claims priority of provisional application 61/624,026, filed on Apr. 13, 2012.
Prior Publication US 2022/0241494 A1, Aug. 4, 2022
Int. Cl. A61M 5/142 (2006.01); A61M 5/20 (2006.01); A61M 5/145 (2006.01)
CPC A61M 5/14248 (2013.01) [A61M 5/20 (2013.01); A61M 5/2033 (2013.01); A61M 2005/14252 (2013.01); A61M 2005/14256 (2013.01); A61M 5/1454 (2013.01); A61M 2005/206 (2013.01); A61M 2205/582 (2013.01); A61M 2205/584 (2013.01); A61M 2205/585 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A device for delivering a fluid comprising:
a housing defining an interior space and having a bottom surface configured for contacting a patient, the bottom surface defining a needle opening;
a reservoir disposed within the interior space of the housing for containing a fluid therein;
a biased plunger configured to move within the reservoir;
a needle carrier disposed within the housing;
an injection needle supported by the needle carrier and defining a lumen in selective fluid communication with the reservoir;
a biased needle actuator movably disposed within the housing, wherein via interaction between the needle actuator and the needle carrier, movement of the needle actuator controls movement of the injection needle from an initial position in which the injection needle is disposed within the housing, to a use position in which the injection needle extends through the needle opening, and subsequently to a substantially shielded position; and
a needle stop, wherein when the injection needle reaches the use position, in a first position, the needle stop contacts the plunger and engages the needle actuator to prevent further movement of the needle actuator;
wherein upon a predetermined displacement of the plunger, the needle stop moves from the first position to a second position, permitting movement of the needle actuator, to move the needle to the substantially shielded position.