US Patent 8205725 Electric disk brake

An electric disk brake includes a single electric motor, a pair of rotary-to-linear conversion mechanisms to which rotation of the electric motor is transferred, a pressing member that presses a brake pad toward a disk rotor by each of the rotary-to-linear conversion mechanisms and a reduction mechanism interposed between the electric motor and the pair of rotary-to-linear conversion mechanisms. The reduction mechanism transfers rotation output, where input of the electric motor is expanded, to one side of the pair of rotary-to-linear conversion mechanisms and transfers reaction force of the rotation output to the other side of the pair of rotary-to-linear conversion mechanisms.