Patent ID: 11660398

Abstract:
The present invention relates to a stopper for an injector for delivery of a pharmaceutical composition and to an injector with the stopper. The stopper has a stopper body with an actuating surface opposite an outlet surface, an axial length between the actuating surface and the outlet surface, and a transverse diameter, which stopper body defines an access diameter, the stopper at an axial location from the actuating surface comprising a deformable sealing element surrounding the stopper body and having an outer diameter, which is larger than the transverse diameter, which deformable sealing element is made from a thermoplastic elastomer and has an axial extension in the range of 5% and 95% of the axial length of the stopper body, and the stopper comprising a cavity at the axial location of the deformable sealing element, the cavity having a lateral extension larger than the access diameter of the stopper body.