Crossbow utilizing cams

A crossbow comprising:

• a frame including a riser and an opening along a projectile axis, wherein the crossbow is configured to move a projectile along the projectile axis during firing and arming of the crossbow, wherein the projectile is fired from a front end of the frame;
• a first and a second cam attached to the frame, each of the first and second cams having a larger diameter portion and a smaller diameter portion;
• a first flexible limb and a second flexible limb, each of the first and the second limbs having a first end attached to the frame and a second end, wherein the first and second flexible limbs are in an unloaded position when the crossbow is undrawn and in a loaded position when the crossbow is drawn;
• a first power group at a first frame side, the first power group including a first power cable, a first power cable pulley, a first frame pulley, and the first cam, wherein a first end of the first power cable is attached to a first stationary mounting position on the riser, the first power cable is routed around the first power cable pulley attached to the second end of the first flexible limb, the first power cable is further routed around the first frame pulley attached to the frame, and a second end of the first power cable is attached to the smaller diameter portion of the first cam;
• a second power group at a second frame side, the second power group including a second power cable, a second power cable pulley, a second frame pulley, and the second cam, wherein a first end of the second power cable is attached to a second stationary mounting position on the riser, the second power cable is routed around the second power cable pulley attached to the second end of the second flexible limb, the second power cable is further routed around the second frame pulley attached to the frame, and the second end of the second power cable is attached to the smaller diameter portion of the second cam;
• a drawstring having a first and a second end, wherein the first end of the drawstring is attached to the larger diameter portion of the first cam and the second end of the drawstring is attached to the larger diameter portion of the second cam;
• and
• wherein the drawstring wraps around the larger diameter portions of the cams when the crossbow is undrawn and wherein the first and second power cables wrap around the smaller diameter portions of the cams when the crossbow is in the loaded position.

A crossbow comprising:

• a frame having a projectile axis, wherein a projectile moves along the projectile axis during firing of the crossbow;
• a multiple-wind cam attached to the frame, having a larger diameter portion and a smaller diameter portion, wherein the larger diameter portion has a larger diameter than the smaller diameter portion;
• a flexible limb having a first end attached to the frame and a second end, wherein the flexible limb is in an unloaded position when the crossbow is undrawn and in a loaded position when the crossbow is drawn;
• a power group including a power cable having a first and second end, the first end attached to a stationary mounting position on the frame, the power cable routed around a pulley, and the second end attached to the smaller diameter portion of the multiple-wind cam;
• and
• a drawstring having a first and second end, wherein the first end is attached to the larger diameter portion of the multiple-wind cam,
• wherein the drawstring wraps around the larger diameter portion of the multiple-wind cam when the crossbow is undrawn and wherein the power cable wraps around the smaller diameter portion of the multiple-wind cam when the crossbow is in the loaded position.