Drug delivery devices and method of assembly

摘要

A drug delivery device for dispensing of a dose of a medicinal product, comprising a holder (14) for a product-containing cartridge (16), the cartridge (16) having a piston (18) slidably arranged therein in an axial direction, a piston rod (12) to be operably engaged with the cartridge's piston (18) for dispensing of a dose of the medicinal product, and at least one spacer (20) being selected according to a relative distance between piston (18) and piston rod (12) and being disposed between the piston rod (12) and the piston (18) for eliminating axial clearance between piston (18) and piston rod (12).

主权项

1. A drug delivery device for dispensing of a dose of a medicinal product, comprising:
a holder for a product-containing cartridge, the cartridge having a piston slidably arranged therein in an axial direction, and a piston rod to be operably engaged with the cartridge's piston for dispensing of a dose of the medicinal product, wherein at least one spacer selected according to a relative distance between the piston and the piston rod is disposed between the piston rod and the piston for eliminating axial clearance between piston and piston rod, and wherein the at least one spacer is selected from a set of spacers having different axial dimensions and wherein the at least one spacer is selected according to an actually measured or determined or estimated gap size between the piston rod and the piston in the device's final assembly configuration.