US Patent 10209028 Crossbow

A crossbow having a string below the barrel and an arrow rest on top of the barrel. The carriage rides in a track along the length of the barrel. A bottom side of the carriage contacts the string. The upper side of the carriage extends through the upper edge of the barrel and contacts the nock at the aft end of the arrow. The string does not contact the barrel. The string, at about a midpoint, contacts the lower side of the carriage. The string does not rub on the barrel of the crossbow so energy loss and friction damage to the string are avoided.