Patent ID: 8852221

Claim:
A hand-held surgical cutting instrument for cutting bone material with a bone-cutting surgical blade shaped to fit the surgical cutting instrument, comprising: a hand-graspable body for manipulating the cutting instrument; a blade coupling mechanism attached to the body and being configured to attach to the bone-cutting surgical blade, the blade coupling mechanism comprising: a first coupling member including a first blade-contacting surface and a first outer perimeter sidewall adjacent the first blade contacting surface; a second coupling member including a second blade-contacting surface facing the first blade-contacting surface of the first coupling member, the second coupling member including a second outer perimeter sidewall adjacent the second blade contacting surface, the second blade-contacting surface and the second outer perimeter sidewall meeting to define an outer edge, the second coupling member including a bore through the second blade contacting surface, the bore and the second blade contacting surface meeting to define an inner edge; blade-engaging protrusions projecting from at least one of the first and second blade-contacting surfaces, the protrusions being spaced closer to the outer edge than the inner edge; and a driving shaft having a shank defining an axis, the first coupling member being disposed on an end of the shank, the shank configured to be slidably received within the bore of the second coupling member, the shank comprising a blade receiving recess formed in the shank between the first blade-contacting surface and a shoulder portion of the shank.