Piston for a cartridge for use in a drug delivery device

摘要

Abstract A piston for a cartridge to be filled with a medicament, the piston comprising: a first 5 piston member (12) comprising a first material and forming a distal end face (22) of the piston, a second piston member (14) comprising a second material of lower compressibility compared to the first material, wherein the second piston member (14) is arranged in a cupped receptacle (16) of the first piston member (12) and providing a thrust receiving surface (25) at a proximal end (24) of the piston, further 0 comprising an electronic circuit (30) arranged between the first piston (12) member and the second piston member (14), wherein the electronic circuit (30) is designed as a microchip.