Patent ID: 7938108

Claim:
A reverse crossbow containing limbs, a limbs riser, the limbs being directed in the direction of shooting, identical cams having a mechanical center and located on ends of loose parts of said limbs, bowstring and cables passing through cams, a barrel where the said limbs riser is placed, a trigger mechanism and a foregrip, wherein the limbs riser is located on the edge of the barrel behind the trigger mechanism and is centered about the barrel using a cone on the bottom surface of the limbs riser, placed in a reciprocal conical recess in the barrel, where the said limbs riser is fixed to the barrel using a single threaded junction, wherein the initial angle of installation of limbs on their riser and the distance between the points of their fastening is chosen in such a manner that when raising the crossbow the axis of rotation of each cam crosses the line parallel to the central axis of the crossbow and passing through the point of the beginning of bend of each of the limbs, thus the distance between the axes of rotation of cams becomes less than the distance between the points of the beginning of bend of limbs, the axis of rotation of each cam is displaced about its mechanical center that is located inside the area formed by limbs, on a perpendicular to the point of mechanical center located on a straight line, connecting the mechanical center and the exit point of the bowstring, where the cam is placed with a possibility of rotation, where during such a rotation the said mechanical center does not cross the straight line parallel to the straight line connecting the mechanical center of the said cam and the exit point of the said bowstring, and passing through the axis of rotation of the said cam, and the said foregrip has a conic shape with roundings on its ends and it is placed at an angle of 10 to 25° to the said crossbow barrel, and the thickened part of the said foregrip is located in the area most close to the barrel.