Patent ID: 8939979
Filing Date: 2015-01-27
Classification: A61B

Abstract:
1. A medical instrument for burring into small bones in a human patient comprising, an adapter coupled to a motor for effectuating rotation; a spindle supported in said adapter and coupled to said motor; a burr attachment removably attached to said adapter comprising: a coupling element for mating said burr attachment to said spindle, said coupling element including a detent formed on said proximal end support and including a ball supported in said adapter; a cam having a tapered edge formed on an inner diameter thereof, said cam cooperating with the ball for forcing said ball into the detent formed on said proximal end support to couple the burr attachment to said spindle; and a spring disposed between a shoulder extending from an outer surface of the spindle and a proximal end of the cam, wherein said spring biases said cam toward a distal end of the burr attachment.