Abstract: A rotor for a pneumatic tool having electricity-generating capabilities comprises a shaft and an integral rotor body. The rotor body includes recesses dimensioned to receive an insulated subassembly comprising a magnet received within a nonmagnetic insulator. The nonmagnetic insulator acts to allow flux to be concentrated against stator windings. The improved rotor can be fitted with the insulated subassemblies in order to cooperate with a stator in the tool to generate electricity upon rotation of the rotor when pressurized fluid is applied to the vanes. A ring stator is supportable by a nonmagnetic end plate of the pneumatic tool, is disposed between the rotor and the rotor bearing and is preferably formed of Silicon Core Iron “B-FM” and magnet wire.

Abstract: A rotor for a pneumatic tool having electricity-generating capabilities comprises a shaft and an integral rotor body. For the most part, the rotor is generally of conventional design for a pneumatic tool, able to receive vanes on the rotor body and having gear teeth on the shaft. However, the rotor body further includes recesses dimensioned to received an insulated subassembly comprising a magnet received within a nonmagnetic insulator. The nonmagnetic insulator acts to allow flux to be concentrated against stator windings. The improved rotor can be used in a conventional pneumatic tool, but can also be fitted with the insulated subassemblies in order to cooperate with a stator in the tool to generate electricity upon rotation of the rotor when pressurized fluid is applied to the vanes. Thus, the differences between a conventional pneumatic tool rotor and its electricity-generating counterpart are greatly reduced compared to prior art configurations.