Abstract: An inlet valve is provided for a pneumatic tool. The pneumatic tool defines a space and a passageway communicated with the space. The inlet valve includes a housing and a plunger. The housing is movable in the space between a first position where it blocks the space from the passageway and a second position where it allows the communication between the space and the passageway. The housing defines an inlet and an outlet. The plunger is inserted through the outlet and movable in the pneumatic tool between a first position, a second position and a third position. An end of the plunger is put in the housing for pushing the housing, from inside, to the second position as the plunger is in the third position. The plunger includes an annular flange put in the housing for blocking the outlet as the plunger is in the first position and for opening the outlet as the plunger is in the second position.

Abstract: A pneumatic tool is operable with a single hand. The pneumatic tool includes a shell defining a first chamber and a second chamber. The second chamber includes intake and outlet apertures in communication with the first chamber. A cylinder is in the first chamber. A controller is movable in the second chamber between a first position and a second position. The controller includes a first groove and a second groove. In the first position, the first groove communicates with the intake aperture for directing pressurized air to drive the cylinder in a first direction. In the second position, the second groove communicates with the intake aperture for directing pressurized air to drive the cylinder in a second direction. A cover seals the first chamber and the second chamber. The cover defines an opening through which the controller extends from the second chamber so that the controller can be moved.

Abstract: A pneumatic tool is provided with a cylinder assembly. The cylinder assembly includes a cylinder, two steel plates and two covers. The cylinder defines an axial bore, two grooves on an external side and two groups of intakes in communication with the axial bore. Each of the steel plates defines an eccentric opening, two slots and two cutouts in an external edge. The steel plates are located against the cylinder so that the cutouts are in communication with the grooves. Each of the covers defines an eccentric opening and two grooves extending on a side to an external edge. The covers are attached to the cylinder so that the grooves of the cylinder are in communication with the slots through the cutouts and the grooves of the covers.

Abstract: A pneumatic tool includes a shell defining first, second, third and fourth communicating spaces, a channel communicated with the second space, an inlet communicated with the channel, and an outlet communicated with the second space. A cylinder in the first space defines first, second and third ports. Pressurized air drives a rotor in the cylinder in a direction while entering the cylinder through the first port and leaving the cylinder through the third port and in an opposite direction while entering the cylinder through the second port and leaving the cylinder through the third port. A cover connected to the shell defines an aperture communicated with the second space, a first channel communicated with the third space on one hand and the first port on the other hand, a second channel communicated with the fourth space on one hand and the second port on the other hand. A rotational switch extends into the second space through the aperture and defines two cutouts.

Abstract: There is disclosed a pneumatic tool including a shell defining a first space, a second space communicated with the first space, a third space communicated with the second space, a fourth space communicated with the second space, a channel communicated with the second space, an inlet communicated with the channel, and an outlet communicated with the second space. A cylinder is put in the first space, and defines first, second and third ports. Pressurized air drives a rotor in the cylinder in a direction while entering the cylinder through the first port and leaving the cylinder through the third port. Pressurized air drives the rotor in an opposite direction while entering the cylinder through the second port and leaving the cylinder through the third port.

Abstract: There is disclosed a motor of a pneumatic tool. The motor includes a cylinder, a rotor put in the cylinder, a plurality of leaves movable to the cylinder from the rotor in operation, a front cover connected to a front end of the cylinder, a rear cover connected to a rear end of the cylinder, a front pad put between the rotor and the front cover and between the leaves and the front cover, and a rear pad put between the rotor and the rear cover and between the leaves and the rear cover.

Abstract: A clutch is disclosed for a power tool. The clutch includes a disc, a drum, at least one spring and at least one pin. The disc defines at least one arched groove comprising a floor and an inclined wall. The drum defines at least one eccentric hole. The spring is put in the eccentric hole. An end of the pin is put in the eccentric hole and pushed by means of the spring. An opposite end of the pin is exposed from the eccentric hole for pushing the inclined wall before a predetermined value of torque is reached and for sliding on the inclined wall after the predetermined value of torque is reached.

Abstract: An inlet valve is provided for a pneumatic tool. The pneumatic tool defines a space and a passageway communicated with the space. The inlet valve includes a ring and a controller. The ring can be tilted in the space between a first position where it blocks the space from the passageway and a second position where it allows the communication between the space and the passageway. The ring defines a central aperture. The controller can be pivoted in the space between a first position, a second position and a third position. The controller includes a disc and a rod raised from the disc. The disc is put against the ring as the controller is in the first position and pivoted from the ring as the controller is in the second position. The rod is inserted through the central aperture of the ring. The diameter of the rod is smaller than that of the central aperture of the ring in order to allow pressurized air to travel through the central aperture of the ring as the controller is in the second position.

Abstract: An inlet valve is provided for a pneumatic tool. The pneumatic tool defines a space and a passageway communicated with the space. The inlet valve includes a housing and a plunger. The housing is movable in the space between a first position where it blocks the space from the passageway and a second position where it allows the communication between the space and the passageway. The housing defines an inlet and an outlet. The plunger is inserted through the outlet and movable in the pneumatic tool between a first position, a second position and a third position. An end of the plunger is put in the housing for pushing the housing, from inside, to the second position as the plunger is in the third position. The plunger includes an annular flange put in the housing for blocking the outlet as the plunger is in the first position and for opening the outlet as the plunger is in the second position.