Patent ID: 6595100
Filing Date: 2003-07-22
Classification: F41A

Abstract:
A weapon comprising:a weapon barrel supported in a cradle for displacement from a normal position to a recoil position, and having a breech ring that includes a wedge breech block with a breech block wedge that is displaceable transversely to the bore axis of the weapon barrel from a closed position to an open position; a piston rod, which is axially displaceable from a normal position to an actuation position, disposed on the breech ring and having its end facing the cradle protruding past an end of the breech ring, and having its end remote from the cradle acting via intermediate members on an opener lever connected to the breech block wedge such that a displacement of the piston rod toward the breech block wedge causes a pivoting motion of the opener level, and thus an opening of the breech block wedge; a control cam fixedly mounted on the breech ring and extending substantially parallel to the piston rod; a control unit mounted on the cradle and operatively connecting the piston rod and the control cam such that, upon a forward motion of the weapon barrel from its recoil position to its normal position, the piston rod is displaced by the control unit, and thus the breech block wedge is also displaced into its open position; the control unit includes a shift rod, which is displaceable axially toward the muzzle of the weapon barrel counter to the pressure of a first spring and is axially aligned with the piston rod, a control rod, which is displaceable axially toward the muzzle of the weapon barrel counter to the pressure of a second spring and is axially aligned with the control cam, and a detent pawl, which is pivotable by a cam from a blocking position to a release position, wherein the cam engages a recess in the control rod such that in the normal position of the control rod, the cam presses the detent pawl into a detent groove of the shift rod so as to prevent axial displacement of the shift rod, and such that upon displacement of the control rod in the direction of the muzzle of the weapon barrel, the cam pivots the detent pawl into its release position and thus out of the detent groove; and the lengths of the piston rod and of the shift rod are such that the breech block wedge, upon the forward motion of the weapon barrel as a result of the axial displacement of the piston and shift rods has already been displaced into its open position before the control cam causes a displacement of the control rod, and thus a pivoting of the detent pawl into its release position.