Patent ID: 8496479

Claim:
A device for the simulation of the recoil of a firearm which is retrofitted as a laser gun for training purposes, the device comprising: a knockover slide; a breechblock which can be moved backwards and forwards between a closed starting position and an open end position with the knockover slide; a hydraulic working piston in indirect or direct working connection with the breechblock; a control mechanism for controlling the hydraulic working piston, the working piston being acted on by hydraulic fluid and being adjusted into a working position moving the breechblock from the starting position into the end position; a hydraulic chamber accommodating the hydraulic fluid; a pressure valve; a discharge valve; a return chamber; a valve pressure lever that is deflected by an adjusting movement of the knockover slide and brings about an opening of the pressure valve, as a result of which hydraulic fluid is fed under high system pressure to the working piston, the pressure valve being in connection with the hydraulic chamber; a movable separating piston associated with the hydraulic chamber, the movable separating piston separating the hydraulic chamber tightly from a gas pressure chamber filled with a compressed gas bringing about the system pressure, the movable separating piston being acted on by the compressed gas, the working piston indirectly or directly, at the end of the adjusting movement bringing about a closing of the pressure valve and an opening of the discharge valve at the same time or in a time-delayed manner and the hydraulic fluid is conveyed, with the open discharge valve from the working piston into the return chamber; and an adjusting piston provided in said return chamber in an axially and adjustable, tight manner, said adjusting piston being movable from a start position to an end position for increasing a volume of said return chamber to receive said hydraulic fluid of said hydraulic chamber, wherein said hydraulic fluid is entirely conveyed back into said hydraulic chamber by resetting said adjusting piston in said return chamber from said end position to said starting position.