Motorized surgical handpiece

Details Motorized surgical handpiece Motorized surgical handpiece

2005-07-25

2009-10-06

Nguyen, Anhtuan T (Department: 3731)

Surgery

Instruments

Cutting, puncturing or piercing

C173S217000, C277S412000

Reexamination Certificate

active

07597699

ABSTRACT:
A motorized surgical handpiece comprises a housing enclosing an interior containing a motor and an output shaft for being driven in rotation by the motor. The output shaft has a central longitudinal axis, a bore extending therethrough for receiving a shank of a surgical tool to be rotatably driven by the output shaft, a forward end portion extending forwardly beyond the motor and a rearward end portion extending rearwardly beyond the motor. The housing has a continuous lumen extending entirely therethrough formed in part by the output shaft bore for insertion of a bore brush through the lumen for cleaning when the surgical tool is removed from the handpiece. The handpiece has forward and rearward labyrinth seals comprising rotor components respectively attached to the forward and rearward end portions of the output shaft for rotation in corresponding stator components with there being a labyrinthine clearance between each rotor component and its stator component to receive pressurized air during use and during cleaning of the handpiece to avoid the entry of contaminants.

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