Cylinder-piston-unit has cylinder receiving injection solution and piston, where cylinder has cylinder inner wall, outer wall and storage cavity between cylinder inner wall and outer wall

摘要

The cylinder-piston-unit (10) has a cylinder (20) receiving an injection solution (1) and a piston (80). The cylinder has a cylinder inner wall, an outer wall (32) and a storage cavity (158) between the cylinder inner wall and the outer wall. The storage cavity is sealed against the environment (9) in a moisture-resistant manner. A moistened or moisture-storing material (171) is arranged in the cavity in certain areas. A protective housing (150) is made of glass, stainless steel or a surface-coated non-ferrous metal.