Patent ID: 8002774

Claim:
A bone mill, said bone mill including: a base; a motor disposed in said base; a motor coupling feature connected to said motor; and a mill head, said mill head including: a housing separate from said base, said housing having: a first opening; a second opening; and an attachment feature adjacent the second opening wherein, said housing is shaped to be mounted to said base; a cutting device disposed in said housing, said cutting device being positioned in said housing between the first and second housing openings and having at least one cutting feature for cutting bone stock introduced into the housing first opening into bone chips and defining an opening through which the bone chips pass so that the bone chips are discharged through the housing second opening wherein, said cutting device is moveably disposed in said housing to move across the first and second housing openings; and a cutting device coupling feature integral with said cutting device for releasably engaging said motor coupling feature so that when said coupling features are engaged, actuation of said motor results in the movement of said cutting device across the housing openings; a catch tray, said catch tray having: an open end; a lip that extends upwardly from the open end; and an attachment feature that cooperates with said housing attachment feature so that said attachment features removably hold said catch tray to said housing adjacent the housing second opening so that said catch tray and said mill head can be coupled to said base as a unitary assembly and so the bone chips discharged through the housing second opening are discharged into the open end of said catch tray and so that, upon removal of said catch tray from said housing, said catch tray lip passes across a portion of said cutting device that extends across the housing second opening; and a locking assembly for releasably holding said mill head housing to said base in a position so that said coupling features can engage.