Abstract: A cushion device of a pneumatic tool has a body, a cushion, and a piston assembly. The body includes a containing portion which has a bottom surface. The cushion is mounted in the containing portion of the body, is formed cylindrical, and has an axial direction, two end surfaces, an interior, an exterior, and at least one passage. The two end surfaces are separately located along the axial direction, and one of the two end surfaces abuts against the bottom surface of the containing portion. The at least one passage is disposed on the cushion, and communicates with the interior and the exterior. The piston assembly is movably mounted to the containing portion of the body and has a base and a cylinder. The base has an abutting portion abutting against the other one of the two end surfaces of the cushion. The cylinder is connected with the base.

Abstract: The power ratchet wrench has a body, a planet gear device and a mounting bracket. The body has an outer thread and an annular flange. The planet gear device is connected to the body and has three transmitting gear wheels, a rotating bracket, a bearing and a mounting cover. The transmitting gear wheels are mounted in the chamber of the body. The rotating bracket is rotatably mounted in the chamber of the body, is connected with the transmitting gear wheels and has a bottom plate, three mounting posts and an extending rod. The mounting cover is connected to the body around the rotating bracket and has an inner thread and a resisting flange. The mounting bracket is connected to the planet gear device and the body and receives an operating device.

Abstract: The power ratchet wrench has a body, a planet gear device and a mounting bracket. The body has an outer thread and an annular flange. The planet gear device is connected to the body and has three transmitting gear wheels, a rotating bracket, a bearing and a mounting cover. The transmitting gear wheels are mounted in the chamber of the body. The rotating bracket is rotatably mounted in the chamber of the body, is connected with the transmitting gear wheels and has a bottom plate, three mounting posts and an extending rod. The mounting cover is connected to the body around the rotating bracket and has an inner thread and a resisting flange. The mounting bracket is connected to the planet gear device and the body and has a mounting jacket and an operating device.

Abstract: A pneumatic ratchet wrench has a body, an air input valve, a switch, a propeller, an eccentric spindle, a lever, a sleeve, a nut and a head. The body has a cavity, a front end and a rear end. The air input valve, the switch, the propeller, the eccentric spindle, the sleeve, the nut and the head are mounted inside the body in sequence from the rear end to the front end. The pneumatic ratchet wrench has few elements so that it provides an easy assembly for operators. Also, the pneumatic ratchet wrench has a small volume and can be used in a small space.