Patent ID: 8852159
Filing Date: 2014-10-07
Classification: A61M

Abstract:
1. Injection device comprising: a body designed to receive a product to be injected, the body having a distal end with an injection needle, the body receiving a piston rod and a piston capable of moving in the body between a storage position and an end-of-injection position and of pushing the product through the injection needle, a cover for the injection needle, the cover being movable relative to the body between an initial position, in which the injection needle is uncovered, and a final position, in which the injection needle is at least partially covered, and a spring for moving the cover between said initial and final positions, wherein the piston rod comprises a first portion, in the form of a rod having said piston located at a distal end thereof, and a second portion, located radially-outwardly about a proximal portion of said rod, operatively coupled together and selectively movable together in the distal direction, at least one of the first portion and the second portion being movable in the proximal direction separate from the other one of the first portion and the second portion so as to alter the overall length of the piston rod.