Surgical handpiece

A proportional surgical instrument handpiece which transfers rotary motion to linear motion to thereby actuate a surgical instrument operatively connected to the handpiece, the handpiece comprising:

• an elongated housing having a first end connectable to a surgical instrument and a second end connectable to power supply means and an outer side wall extending between the first end of the housing and the second end of the housing;
• a nosepiece attached to the first end of the housing and operatively and detachably connectable to a surgical instrument;
• a proportionally operable motor mounted within the housing and having a rotatable motor shaft which is engageable with a nut;
• and
• a nut threadably engaged with the rotatable motor shaft and having an axial nut shaft which is directed toward and which contacts an end of an actuator pin of the surgical instrument when the motor is selectively operated, to thereby actuate the surgical instrument in a proportional manner, the nut being rotationally locked, so that operation of the motor and resultant rotation of the motor shaft in one direction causes the nut to move linearly within the housing, away from the motor and toward the actuator pin, and so that operation of the motor in the other direction and resultant rotation of the motor shaft in the other direction causes the nut to move linearly within the housing, toward the motor and away from the actuator pin, as the rotary motion of the motor is transferred to linear motion of the nut and nut shaft, to thereby proportionally operate the surgical instrument connected to the handpiece.