公开(公告)号：US11577027B2

公开(公告)日：2023-02-14

申请号：US17258899

申请日：2019-07-09

Applicant: HOFFMANN-LA ROCHE INC.

Inventor： Maxime Gaillot ,  Alan Dwyer ,  Pascal Launois ,  Julian McDonnell ,  Eoin Connaughton ,  Mark Digby Teucher ,  Jonathan Paul Ridley

IPC: A61M5/315

Abstract: A plunger (1) for a medical delivery device comprises: a rod element (2) having a distal end (22) and a proximal end, and a stopper (3) mounted to the rod element (2) at its distal end (22). The rod element (2) has a first form fit structure (24) and the stopper (3) has a second form fit structure (31). The stopper (3) is locked to the rod element (2) by the first form fit structure (24) of the rod element (2) and the second form fit structure (31) of the stopper (3) engaging each other.