| 摘要 |
A powered surgical handpiece for use with a micro-cutting instrument, includes a motor contained within a housing. The housing includes a motor enclosure surrounding the motor and a sleeve placed about the motor enclosure. An internal passage is formed entirely between the sleeve and the motor enclosure. Finally, the sleeve defines a handling region and forms inlet and outlet ports proximal the handling region which are fluidly connected to the internal passage. During use, a cooling fluid, flows through the internal passage as the cooling fluid circulates from the inlet port to the outlet port. The motor is sealed relative to the cooling fluid by the motor enclosure. Thus, the cooling fluid does not directly contact the motor, but instead serves as a heat exchange medium through which heat generated by the motor is thermally transferred to the cooling fluid via the motor enclosure.
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