A gas passage switching structure for a pneumatic rotary hand tool includes a pneumatic motor and a revolving valve disposed in a device case. The pneumatic motor has an input ending surface. A forward gas inlet and a reverse gas inlet are formed and spaced apart on the input ending surface. The revolving valve has a gas supply surface. A gas supply port and a discharge port are formed and spaced apart on the gas supply surface. The gas supply surface and the input ending surface are arranged along an axis line in the device case adjacent or in contact with the arrangement so that it allows the pneumatic motor to drive the forward and reverse rotation by the high pressure air flow along the fluid passage in the axis line direction.

A gas passage switching structure for a pneumatic rotary hand tool includes a pneumatic motor and a revolving valve disposed in a device case. The pneumatic motor has an input ending surface. A forward gas inlet and a reverse gas inlet are formed and spaced apart on the input ending surface. The revolving valve has a gas supply surface. A gas supply port and a discharge port are formed and spaced apart on the gas supply surface. The gas supply surface and the input ending surface are arranged along an axis line in the device case adjacent or in contact with the arrangement so that it allows the pneumatic motor to drive the forward and reverse rotation by the high pressure air flow along the fluid passage in the axis line direction.

A reversing mechanism for a pneumatically or hydraulically powered tool having a rotor adapted to rotate in either of first and second rotational directions. The reversing mechanism allows a user to actuate a button and rotate a valve to direct air flow through the tool. By pressing the button, the button will move a base laterally, and in doing so, rotates the valve. Rotating the valve then aligns a barrier of the valve in a direction tangential to the selected rotational direction of the tool, better directing forced air or fluid and more efficiently distributing the air or fluid in the selected rotational direction.

A reversing mechanism for a pneumatically or hydraulically powered tool having a rotor adapted to rotate in either of first and second rotational directions. The reversing mechanism allows a user to actuate a button and rotate a valve to direct air flow through the tool. By pressing the button, the button will move a base laterally, and in doing so, rotates the valve. Rotating the valve then aligns a barrier of the valve in a direction tangential to the selected rotational direction of the tool, better directing forced air or fluid and more efficiently distributing the air or fluid in the selected rotational direction.

The present invention relates broadly to a flow diverter disposed in a plenum area of a motor cylinder chamber (also referred to as kidney ports). The flow diverter acts as a barrier between a main inlet to the motor and an inlet to the cylinder chamber, and directs air or fluid to vane lifter ports of the motor before the air or fluid flows to the inlet to the cylinder chamber. In addition, the flow diverter can serve to regulate air or fluid flowing into the cylinder chamber to control power of the tool. The flow diverter allows for numerous options of where the main inlet to the motor can be positioned and provides a means of regulating the air or fluid flowing into the cylinder chamber.

The present invention relates broadly to a flow diverter disposed in a plenum area of a motor cylinder chamber (also referred to as kidney ports). The flow diverter acts as a barrier between a main inlet to the motor and an inlet to the cylinder chamber, and directs air or fluid to vane lifter ports of the motor before the air or fluid flows to the inlet to the cylinder chamber. In addition, the flow diverter can serve to regulate air or fluid flowing into the cylinder chamber to control power of the tool. The flow diverter allows for numerous options of where the main inlet to the motor can be positioned and provides a means of regulating the air or fluid flowing into the cylinder chamber.

A pneumatic engine includes a plurality of pneumatic motors and an engine drive shaft. Each motor has a motor gas inlet, a motor gas outlet, and a rotor driven by gas flow between the motor gas inlet and the motor gas outlet. The engine drive shaft is drivingly coupled to the motor drive shaft of each of the pneumatic motors.

A pneumatic engine includes a plurality of pneumatic motors and an engine drive shaft. Each motor has a motor gas inlet, a motor gas outlet, and a rotor driven by gas flow between the motor gas inlet and the motor gas outlet. The engine drive shaft is drivingly coupled to the motor drive shaft of each of the pneumatic motors.

A power device for a pneumatic packing tool includes a gas delivery unit and a pneumatic unit. The gas delivery unit has an accommodation room, an air inlet, and air outlets. The accommodation room includes a turning block having an input passage. An expansion space is defined between the turning block and the accommodation room. The expansion space communicates with the air outlets. An outer circumferential side of the gas delivery unit is provided with a knob. A push rod is inserted in the knob and the turning block. The pneumatic unit has two through holes. Through the knob, the turning block is turned for the input passage to communicate with one of the through holes to set the direction of winding a belt quickly, and the gas flows from the other through hole to the expansion space to be expanded and exhausted to eliminate the noise.

A power device for a pneumatic packing tool includes a gas delivery unit and a pneumatic unit. The gas delivery unit has an accommodation room, an air inlet, and air outlets. The accommodation room includes a turning block having an input passage. An expansion space is defined between the turning block and the accommodation room. The expansion space communicates with the air outlets. An outer circumferential side of the gas delivery unit is provided with a knob. A push rod is inserted in the knob and the turning block. The pneumatic unit has two through holes. Through the knob, the turning block is turned for the input passage to communicate with one of the through holes to set the direction of winding a belt quickly, and the gas flows from the other through hole to the expansion space to be expanded and exhausted to eliminate the noise.