An endoluminal delivery device assembly (10) comprises: an introducer (500) including a seal housing assembly (540), housing a seal (550), and a sheath (510) extending proximally therefrom； a delivery device (11) including a handle body (218) and a pusher catheter extending from the body, the pusher catheter (300) having a pusher catheter external surface, the pusher catheter (300) extending through the introducer (500) such that the external surface slidably engages with the seal (550)； a guide wire catheter (40) extending through the body and through the pusher, the guide wire catheter (40) being affixed at a proximal end thereof to a tip assembly； and a linking portion (710) for linking the body and the seal housing assembly together, the linking portion (710) having an unlinked condition and a linked condition. In the linked condition, sliding movement between the pusher catheter and the seal is limited such that disengagement between the pusher catheter external surface and the seal is prevented.
