#$%^&*AU2016244303B220181004.pdf#####ABSTRACT The surgical tool of this invention is designed to provide an internal circuit board, which is sealed so as to avoid malfunction caused by sterilization. Internal to a handpiece, that contains a DC motor, is a module that contains the control circuit that regulates the application of power to the motor. This control circuit is contained in a sealed module. The components internal to the sealed control module are shielded from the outside environment using active seals. An active seal comprises a boot and a spring that collectively form a substantially gas-tight seal between the interior of the control module housing and the external environment. Pins enter through a series of holes found on a single panel of the module housing and into the inside of the control module housing. Active seals are relatively inexpensive to provide. The control module further includes a shell to which a lid is attached. A threaded fastener holds the lid to the shell. One or more O-rings are disposed between the lid and the shell. The O-rings form a substantially gas-tight seal between the lid and the shell. The O-rings are able to withstand the rigors of autoclave sterilization.1/25 COC 00 UIn Mug LO
