Patent ID: 6536324
Filing Date: 2003-03-25
Classification: F41A

Abstract:
An anti-recoil device comprising a recoil brake serving as a recuperator and a compensator coupled to the brake by a duct;the brake comprising a principal cavity, a principal piston pierced with first holes and a principal rod with one end integral with the piston and one end outside of the cavity, the piston forming an imperfect barrier which subdivides the cavity into a first chamber inside of which the rod passes and a second chamber which is larger than said first chamber, the compensator comprising a subsidiary cavity, a subsidiary fluid-tight piston to delimit a subsidiary chamber inside the subsidiary cavity, and a return system which acts on the subsidiary piston to tend to reduce the volume of the subsidiary chamber, the device having its principal cavity and its subsidiary chamber filled with liquid, the duct interconnecting the first chamber and the subsidiary chamber and the system being provided in order to be used with the first chamber which increases in volume during the recoil, wherein the subsidiary chamber constitutes an empty space delimited by the subsidiary piston and the subsidiary cavity and wherein a valve is mounted on an assembly comprising the principal piston and the rod, said valve comprising second holes smaller than said principal piston first holes which are superposed on said first holes when said valve is closed to reduce the diameter of said first holes, said valve opening when the pressure in the second chamber exceeds that in the first chamber by a predetermined value.