Patent ID: 8377008

Claim:
A device for automatic injection of a product into an injection site, the device comprising: a tubular housing having an open proximal end; a tubular safety shield movable with respect to said housing; a button slidably disposed within said proximal end of said housing, said button including legs extending distally into said housing, said legs being spaced apart with inwardly facing surfaces having a plurality of first locking members defined thereon; and, an actuation member disposed in said housing, said actuation member including a base with branches extending proximally therefrom, said branches each having a plurality of second locking members defined on outwardly facing surfaces thereof, said second locking members being formed to complementarily engage said first locking members, said branches being spaced apart such that said branches are selectively inwardly deflectable, wherein, in an initial state, said first locking members are axially spaced from said second locking members, wherein, in a post-use state, said first locking members are in at least partial face-to-face engagement with said second locking members, wherein, said branches being caused to be inwardly deflected between said initial state and said post-use state, and wherein, with sufficient proximal movement of said shield relative to said actuation member, said shield engaging said branches so as to cause said branches to inwardly deflect.