Patent ID: 7678072

Claim:
An injection device for holding and activating a two-chamber ampoule provided with pistons and an overflow channel, incorporating an injection needle and incorporating components whose relative movement causes the pistons of the two-chamber ampoule ( 111 ) to be displaced in order to mix the substances until the inner piston ( 111 A) reaches the overflow channel ( 111 E) of the two-chamber ampoule and comes to a standstill, whereupon the outer piston ( 111 B) transports the first active substance, which is contained in the rear chamber ( 111 D), into the front chamber ( 111 C) leading to the injection needle and containing the second active substance, and also incorporating devices for injecting the product that has been mixed in this way, characterized in that a receptacle ( 103 ), into which the two-chamber ampoule ( 111 ) is insertable and in which it is securable is held in a housing ( 101 ), that the receptacle ( 103 ) is displaceable by means of a cradle ( 108 ), that a tappet ( 104 ), which actuates the pistons ( 111 A, 111 B) is held displaceable in the receptacle ( 103 ), and that for performing the mixing stroke, needle-insertion stroke, injection stroke, and a return stroke, a traction cable ( 114 ) is provided, which is deflected by means of a roller ( 109 ), which is mounted on the cradle ( 108 ), and one of whose ends is connected to the receptacle ( 103 ) and the other end of which is connected to a tension spring ( 110 ), which is held on the housing ( 101 ) wherein devices, which are activated automatically and/or manually between the housing ( 101 ), receptacle ( 103 ), tappet ( 104 ) and cradle ( 108 ), control their alternating coupling to the traction cable ( 114 ) and thus the sequence of the mixing stroke, insertion stroke, injection stroke and return stroke.