Patent ID: 9289549
Filing Date: 2016-03-22
CPC Classification: A61M

Claim Text:
1. A tank ( 11 ) for a drug infusion device ( 41 ), comprising a hollow cylindrical body ( 13 ) provided at its front with an opening ( 15 ) for the passage of the drug and in its inside with a plunger ( 25 ) slidable within the tank for drawing in and/or injecting the drug through said opening, said tank being provided at its rear with a coupling part for ensuring the mechanical connection of the tank ( 11 ) with a complementary coupling part provided in the infusion device ( 41 ), wherein said coupling parts define together a bayonet-like connection coupling, wherein said coupling part of the tank ( 11 ) is housed inside the cylindrical body ( 13 ), wherein the bayonet-like connection coupling is of the kind having radial teeth and comprises a female part associated with the tank and a male part associated with the infusion device, wherein the female part is associated with the tank and is provided with axial inlets ( 17 a ) formed in the wall ( 13 a ) of the cylindrical body ( 13 ) at the base of said cylindrical body ( 13 ) and radially open towards the inside of the tank ( 11 ) and communicating with a corresponding number of radial grooves ( 17 b ) circumferentially extending between one axial inlet ( 17 a ) and another and having an interruption at the end opposite to the respective inlet 17 a for forming an abutment for the teeth of the male part of the bayonet-like connection coupling, and wherein radial reliefs ( 17 c ) are provided between the inlets ( 17 a ) and the respective grooves ( 17 b ) so as form a corresponding non-return abutment for the male part of the coupling, which prevents accidental disengagement of the bayonet coupling.