Abstract: A disc brake to receive a disc and a brake pad. The disc brake includes an inner pad to produce friction with one side of a disc, an outer pad to produce friction with an opposite side of the disc, and a caliper housing including a cylinder part provided therein with a cylinder to receive a piston to press the inner pad and a finger part provided in front of the cylinder part to press the outer pad. The caliper housing includes a spacer to variably change an interval between the cylinder part and the finger part.

Abstract: A caliper disc brake includes a caliper housing having a cylinder, a piston moving forward and backward within the cylinder, a dust seal mounted at a front end of an opening of the piston, first and second sealing members provided between an inner surface of the cylinder and an outer surface of the piston. The first sealing member is provided at the rear of the dust seal. The second sealing member is separated from the first sealing member by a designated interval. Oil channels to communicate a space around the outer circumferential surface of the piston, formed by the first sealing member and the second sealing member, and a space around the rear surface of the piston, formed by the second sealing member and the cylinder, with each other to operate a rollback function of the second sealing member are formed in the piston.

Abstract: Disclosed is a disc brake to receive a disc and a brake pad. The disc brake includes an inner pad to produce friction with one side of a disc, an outer pad to produce friction with an opposite side of the disc, and a caliper housing including a cylinder part provided therein with a cylinder to receive a piston to press the inner pad and a finger part provided in front of the cylinder part to press the outer pad. The caliper housing includes a spacer to variably change an interval between the cylinder part and the finger part.

Abstract: Disclosed herein is a caliper disc brake, which improves a rollback performance of a piston. The caliper disc brake includes a caliper housing provided with a cylinder, the piston moving forward and backward within the cylinder of the caliper housing, a dust seal mounted at a front end of an opening of the piston, a first sealing member provided between the inner surface of the cylinder and the outer surface of the piston at the rear of the dust seal, and a second sealing member separated from the first sealing member by a designated interval and provided between the inner surface of the cylinder and the outer surface of the piston, wherein oil channels to communicate a space around the outer circumferential surface of the piston, formed by the first sealing member and the second sealing member, and a space around the rear surface of the piston, formed by the second sealing member and the cylinder, with each other to operate a rollback function of the second sealing member are formed in the piston.

Abstract: A method for synchronizing data between a mobile terminal and a computer is provided, in which schedule data can be synchronized between the mobile terminal and the computer using a radio network and Internet network. In this method, either a mobile terminal or a computer corresponding to a party requesting data to synchronize transmits its head data to another party for synchronizing data through an Over-The-Air Function (OTAF) system. The party synchronizing data compares the transmitted head data with its head data, and transmits its newest data and corresponding head data in accordance with the comparison result. The requesting party stores the newest data, and transmits its newest data to the parry for synchronizing data through the OTAF system. Then, the party for synchronizing data stores the newest data of the party for requesting data to synchronize in its memory area.

Abstract: A method for synchronizing data between a mobile terminal and a computer is provided, in which schedule data can be synchronized between the mobile terminal and the computer using a radio network and Internet network. In this method, either a mobile terminal or a computer corresponding to a party for requesting data to synchronize transmits its head data to other party for synchronizing data through an Over-The-Air Function (OTAF) system. The party for synchronizing data compares the transmitted head data of the party requesting data to synchronize with its head data, and transmits its newest data and corresponding head data of the party for requesting data to synchronize to the party for requesting data to synchronize in accordance with the comparison result. The party for requesting data to synchronize stores the newest data from the party for requesting data, and transmits its newest data to the party for synchronizing data through the OTAF system.