Patent ID: 9072837
Filing Date: 2015-07-07
Classification: A61M

Abstract:
1. A device for automatic injection of a product into an injection site, the device comprising: a container having a proximal open end, a distal end and a displaceable piston located therebetween; a tubular housing having a proximal end and a distal end, at least a flexible part located at said distal end, said at least a flexible part, in a rest state, defining a first opening at said distal end; a piston rod located in said housing; a first spring configured to displace said piston rod distally; and, an intermediate part fixed at a mid-point to said piston rod, said intermediate part defining a diameter larger than said first opening such that said at least a flexible part deflects outwardly with passage of said intermediate part through said first opening, wherein, with sufficient distal displacement of said piston rod, said piston rod engages said piston and causes distal displacement thereof relative to said container, and, wherein, with sufficient distal displacement of said piston rod, said intermediate part causes said at least a flexible part to deflect outwardly with further distal displacement of said piston rod causing said intermediate part to wholly pass through said first opening with said at least a flexible part returning towards said at rest state, engagement of said at least a flexible part with a surrounding element under force of movement towards said at rest state generating a sound.