US Patent 9746278 Crossbow with a robust multi-functional string-pulling unit

A crossbow includes a barrel, a wing supported on a front portion of the barrel, a string connected to the wing at two ends, a rear sight supported on a rear portion of the barrel, and a string-pulling unit movably supported on the barrel and adapted for pulling the string backward on the barrel. The string-pulling unit includes two parallel shanks, a handle and a crossbar. The shanks are movable along two parallel lateral faces of the barrel. The handle is connected to the shanks near a rear end of each of the shanks. The crossbar is connected to the shanks near a front end of each of the shanks and adapted for keeping the shanks in position relative to each other. Moreover, the crossbar extends over the barrel. A front sight is formed on the crossbar and adapted for cooperation with the rear sight during aiming.