Patent ID: 8608707

Claim:
A device for automatic injection of a product into an injection site, said device having a longitudinal axis and comprising: a housing capable of receiving a container movable relative to said housing between an initial position, in which a tip of a needle provided on the container does not extend beyond a distal end of said housing, to an insertion position, distally spaced relative to said initial position and in which the tip of the needle extends beyond said distal end of said housing; a needle shield for receiving said needle and in which the needle is embedded prior to use of said device; a hollow sheath for receiving the needle shield therein with substantially no rotation therebetween, said sheath being configured to cooperatively engage the needle shield so that, while cooperatively engaged, displacement of said sheath in a distal direction results in distal displacement of the needle shield; and, a deshielder coupled to said needle shield and removably assembled to the distal part of the housing, said deshielder comprising a cylindrical through-hole having an axis substantially identical to the longitudinal axis, said sheath being mounted in the through-hole, wherein, said deshielder is rotatable relative to said distal part of the housing, said sheath and said deshielder being threadedly coupled so that a rotational movement of the deshielder about the device axis with respect to the housing causes an axial displacement of the needle shield in the distal direction with substantially no rotational movement of the needle shield with respect to the needle.