Abstract: A parking brake system that uses a locking device to maintain a parking release condition may include a control lever that may be rotatably connected to the exterior of a transmission, a shift cable that may be rotatably connected to an end of the control lever, the locking device that may be connected to the other end of the shift cable and selectively maintains the parking release condition, and a parking device that includes a piston member in a cylinder and that may be connected to the end of the control lever and uses hydraulic pressure to move the control lever and the shift cable such that the parking release condition may be maintained.

Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed therein, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve, a locking unit disposed within the cylinder for locking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power and an emergency parking device which is connected to the locking unit and selectively forcibly moves the locking unit.

Abstract: A parking brake system that uses a locking device to maintain a parking release condition may include a control lever that may be rotatably connected to the exterior of a transmission, a shift cable that may be rotatably connected to an end of the control lever, the locking device that may be connected to the other end of the shift cable and selectively maintains the parking release condition, and a parking device that includes a piston member in a cylinder and that may be connected to the end of the control lever and uses hydraulic pressure to move the control lever and the shift cable such that the parking release condition may be maintained.

Abstract: A locking apparatus for a parking brake includes a parking lever, a parking lever spring applying a restoring force to the parking lever, a cylinder of which an oil hole is formed thereto, a piston comprising a piston rod connected to the parking lever and a piston main body disposed within the cylinder, and the piston movable along length direction of the cylinder according to supplying or releasing of oil through the oil hole, a solenoid valve, a locking unit disposed within the cylinder for locking the piston when the solenoid valve is supplied electric power and for locking the piston when the solenoid valve is not supplied electric power and an emergency parking device which is connected to the locking unit and selectively forcibly moves the locking unit.