Abstract: A synchronous brake device includes a carrier movably received in a box and a pulley received in the carrier and two ends of the pulley movably engaged with two slots defined through two opposite faces of the box. A brake cable reeves through the pulley and two ends of the brake cable are connected to two respective brake levers. A bridge member movably received in the carrier and two operation cables fixedly connected to the bridge member and extend through a bottom of the box and are connected to two brake mechanisms. Either end of the brake cable is pulled, the carrier is pulled upward and pulls the operation cables.

Abstract: A hydraulic control device for controlling brake systems includes a base having two first passages defined therethrough so as to define two first inlets and two outlets. A second passage is connected between the two first passages and communicates with the two first passages. A shaft is rotatably inserted in the base has a third passage defined therethrough which communicates with the second passage by rotating the shaft. Two first hoses are respectively connected to the two first inlets and the two brake levers. Each first hose has a hydraulic liquid reservoirs connected thereto. Two second hoses are respectively connected to the two outlets and the two brake systems. The front brake system and the rear brake system are operated simultaneously by pulling either one of the brake levers.

Abstract: A synchronous brake device includes a carrier movably received in a box and a pulley received in the carrier and two ends of the pulley movably engaged with two slots defined through two opposite faces of the box. A brake cable reeves through the pulley and two ends of the brake cable are connected to two respective brake levers. A bridge member movably received in the carrier and two operation cables fixedly connected to the bridge member and extend through a bottom of the box and are connected to two brake mechanisms. Either end of the brake cable is pulled, the carrier is pulled upward and pulls the operation cables.