US 11,980,737 B2
Wearable drug delivery device
Ursina Streit, Kirchberg (CH); Roland Margot, Worb (CH); Jan Baumert, Grünen (CH); Simon Bosshard, Bern (CH); Michael Hanimann, Bern (CH); and Patrick Hostettler, Hasle (CH)
Assigned to TecMed AG, Burgdorf (CH)
Filed by TecMed AG, Burgdorf (CH)
Filed on Jun. 21, 2021, as Appl. No. 17/352,559.
Claims priority of application No. 20181599 (EP), filed on Jun. 23, 2020.
Prior Publication US 2021/0393871 A1, Dec. 23, 2021
Int. Cl. A61M 5/142 (2006.01); A61M 5/145 (2006.01); A61M 5/315 (2006.01); A61M 5/158 (2006.01); A61M 5/162 (2006.01)
CPC A61M 5/14248 (2013.01) [A61M 5/1452 (2013.01); A61M 5/31528 (2013.01); A61M 2005/1585 (2013.01); A61M 5/162 (2013.01); A61M 2205/8206 (2013.01); A61M 2207/00 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A patch pump comprising a reservoir unit and a pump unit,
wherein the reservoir unit comprises:
a reservoir unit housing, a base plate, an adhesive patch assembly for attaching the patch pump to a patient, a reservoir comprising a reservoir outlet, a needle assembly configured to provide a drug from the reservoir outlet into the patient, and an inserter assembly configured to insert a portion of the needle assembly into the patient using energy stored in the reservoir unit and/or the pump unit,
wherein:
the reservoir outlet is fluidly connected to the needle assembly,
the reservoir is fluidly connected to a pump mechanism configured to pump the drug out of the reservoir, and
the base plate is mounted on the adhesive patch assembly,
wherein the pump unit comprises:
a pump unit housing, an electrical power source, a drive unit comprising a pump driving means to drive the pump mechanism, and a control unit,
wherein:
the pump unit is configured to be releasably attachable to the reservoir unit by a bayonet connection, the bayonet connection comprising a rotational axis defining an opening side on the patch pump where the pump unit is configured to be lifted away from the base plate to open the bayonet connection, and
wherein the base plate comprises a base plate extension which extends in a plane of the base plate towards the pump unit along a protection distance of about 5 mm and substantially covers an area from a side wall of the reservoir unit housing at the opening side at least to the rotational axis of the bayonet connection to prevent unintended detaching of the pump unit.