Patent ID: 8568358

Claim:
Device ( 1 ; 101 ) for the successive delivery of at least two predetermined doses of a product ( 3 ), comprising: a container ( 2 ) defining a reservoir for containing the product ( 3 ) to be delivered, said container ( 2 ) having an open proximal end ( 2 a ), and a distal end ( 2 b ) defining an outlet port in combination with said reservoir and through which the product ( 3 ) may be delivered, a piston ( 4 ) movable with respect to said reservoir, the distal movement of said piston ( 4 ) causing at least part of the product ( 3 ) to be expelled from said container ( 2 ), a pusher ( 7 ; 107 ) movable with respect to said container ( 2 ) for causing said piston ( 4 ) to move in the distal direction successively from an initial position, in which none of said product ( 3 ) has been expelled to a first position, in which a first dose of said product ( 3 ) has been expelled, and to a second position, in which a second dose of said product ( 3 ) has been expelled, a holder body ( 15 ; 120 ), intended to receive at least part of said container ( 2 ) and said pusher ( 7 ; 107 ), first biasing means ( 22 ; 132 ) designed for tending to urge said pusher ( 7 ; 107 ) in the distal direction, at least from the initial position to the first position, first retaining means ( 9 , 19 ; 109 , 128 ) designed for maintaining said pusher ( 7 , 107 ) in said initial position, first actuation means ( 18 ; 133 , 134 ) designed for deactivating said first retaining means ( 9 , 19 ; 109 , 128 ) and allowing the distal displacement of said pusher ( 7 ; 107 ) at least from the initial to the first positions, second biasing means ( 22 ; 132 ) designed for tending to urge said pusher ( 7 ; 107 ) in the distal direction from the first position to at least said second position, second retaining means ( 11 , 19 ; 110 , 128 ) designed for maintaining said pusher ( 7 , 107 ) in said first position, second actuation means ( 18 ; 133 , 134 ) designed for deactivating said second retaining means ( 11 , 19 ; 110 , 128 ) and allowing the distal displacement of said pusher ( 7 ; 107 ) at least from the first to the second positions, characterized in that said first and second actuation means ( 18 ; 133 , 134 ) are rotationally displaceable to cause the deactivation of said first and second retaining means ( 9 , 11 , 19 : 109 , 110 128 ), respectively.