In an improved air inlet valve assembly, a flow of air along a first or second flow path may be controlled by a position of air inlet guide surfaces of a rotatable valve relative to air inlet guide slots of a fixed valve sleeve. Air flowing along the first flow path may rotate a motor in a first direction to operate the tool in a forward mode. Air flowing along the second flow path may rotate the motor in the second direction to operate the tool in a reverse mode. In the forward mode, as air flows along the first flow path, air may be discharged along a primary discharge path, with a portion of the second flow path providing a secondary discharge path. In the reverse mode, as air flows along the second flow path, air may be discharged along the primary discharge path, with a portion of the first flow path providing the secondary discharge path.

A turbine power unit for a power tool having a turbine housing with an interior space configured to receive therein a fluid powered turbine supported for rotation on a bearing within the turbine housing. A service opening through the turbine housing into the interior space thereof, the service opening configured to permit installation and removal of a bearing into and out of the interior space of the turbine housing. A removable cover releasably securable to the turbine housing over the service opening and transitionable between an open configuration in which a bearing can be installed into and removed from the interior space of the turbine housing through the service opening and a closed configuration in which an installed bearing within the interior space is secured for operation in the turbine housing.

A turbine power unit for a power tool having a turbine housing with an interior space configured to receive therein a fluid powered turbine supported for rotation on a bearing within the turbine housing. A service opening through the turbine housing into the interior space thereof, the service opening configured to permit installation and removal of a bearing into and out of the interior space of the turbine housing. A removable cover releasably securable to the turbine housing over the service opening and transitionable between an open configuration in which a bearing can be installed into and removed from the interior space of the turbine housing through the service opening and a closed configuration in which an installed bearing within the interior space is secured for operation in the turbine housing.

The invention relates to a compressed gas-operated apparatus, which comprises a tool unit and a receiving unit for accommodating the tool unit, wherein the tool unit comprises a stator and a rotor that is rotatingly drivable about a rotational axis relative to the stator while being applied with compressed gas, wherein the tool unit is deflectable relative to the receiving unit from a starting position that is predeterminable by means of the receiving unit into one or more deflection positions. In order to provide a compressed gas-operated apparatus of that type, with which an increased process security can be ensured, it is proposed in accordance with the invention that the apparatus comprises a sensor device for determining a deflection state of the tool unit relative to the receiving unit. The invention also relates to a compressed gas machining system.

The invention relates to a compressed gas-operated apparatus, which comprises a tool unit and a receiving unit for accommodating the tool unit, wherein the tool unit comprises a stator and a rotor that is rotatingly drivable about a rotational axis relative to the stator while being applied with compressed gas, wherein the tool unit is deflectable relative to the receiving unit from a starting position that is predeterminable by means of the receiving unit into one or more deflection positions. In order to provide a compressed gas-operated apparatus of that type, with which an increased process security can be ensured, it is proposed in accordance with the invention that the apparatus comprises a sensor device for determining a deflection state of the tool unit relative to the receiving unit. The invention also relates to a compressed gas machining system.

A pneumatic generating device has a valve sleeve, a valve core, a piston pin, and a guiding assembly. The valve sleeve has a sleeve chamber and an input end. The valve core is mounted rotatably in the valve sleeve and has an axial hole and an annular groove. The annular groove is defined around the valve core. The piston pin is mounted moveably in the axial hole and has an end extending out of the input end of the valve sleeve and combined with a sealing cap. The guiding assembly is combined rotatably with the valve core and has a signal member and a guiding tube. The signal member is held in the annular groove in the valve core and has a passage communicating with the sleeve chamber. The guiding tube is connected with signal member and communicates with the passage in the signal member.

A turbine power unit for a power tool having a turbine housing with an interior space configured to receive therein a fluid powered turbine supported for rotation on a bearing within the turbine housing. A service opening through the turbine housing into the interior space thereof, the service opening configured to permit installation and removal of a bearing into and out of the interior space of the turbine housing. A removable cover releasably securable to the turbine housing over the service opening and transitionable between an open configuration in which a bearing can be installed into and removed from the interior space of the turbine housing through the service opening and a closed configuration in which an installed bearing within the interior space is secured for operation in the turbine housing.

A turbine power unit for a power tool having a turbine housing with an interior space configured to receive therein a fluid powered turbine supported for rotation on a bearing within the turbine housing. A service opening through the turbine housing into the interior space thereof, the service opening configured to permit installation and removal of a bearing into and out of the interior space of the turbine housing. A removable cover releasably securable to the turbine housing over the service opening and transitionable between an open configuration in which a bearing can be installed into and removed from the interior space of the turbine housing through the service opening and a closed configuration in which an installed bearing within the interior space is secured for operation in the turbine housing.

A rotary union for use along an incompressible fluid path between a rotating machine component and a non-rotating machine component includes a non-rotating seal carrier including a non-rotating seal element, which together with the non-rotating seal carrier define a net hydraulic surface on an internal side and a net pneumatic surface on an external side. Contact of an incompressible fluid under pressure with the net hydraulic surface creates a closing force, and contact of a compressible fluid under pressure with the net pneumatic surface creates an opening force.

An air tool monitoring apparatus includes a housing having a hollow chamber formed therein, and also having an inlet and an outlet formed therein, each of the inlet and an outlet in communication with the chamber. The apparatus also includes first and second sensors for sensing condition indicative of tool usage and wear, a battery disposed in the housing, a generator for recharging the battery, and a microprocessor operatively connected to the housing and including a timer, a memory storage module, and a unique identifier. The apparatus may include a baffle for guiding air past the generator. The apparatus further includes a switch for starting and stopping the timer, and a communication device for sending data from the microprocessor to a data collection device. Methods of using the apparatus, along with systems for monitoring and reporting on usage of multiple air tools equipped with the apparatus, are also described.