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AssigneeM.A.N. Maschinenfabrik Augsburg-Nurnberg Aktiengesellschaft
InventorsLothar W. Loscher, Frank Hoogeveen, Gerd Hanselmann
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An apparatus comprising two rasping halves conforming generally to the shape of the bone cavity to be produced, and a drive mechanism for reciprocating both rasping halves counter to each other in an axial direction. A rotary cutting tool in front of the rasping halves prepares the bone cavity to receive the rasping halves. A flexible drive shaft for the cutting tool extends between the rasping halves and rotatably within a drive shaft for the rasping halves. The latter drive shaft has a slot oriented at an angle to the axis of rotation of the drive shaft, and a pin projects from each rasping half into the slot, the pins being located 180.degree. apart. A bushing guides the movement of the rasping halves, and the pin from each rasping half extending through a slot in a housing for their drive shaft prevents twisting of the rasping halves.
Apparatus for producing a cavity in a bone to accommodate an artificial joint member, comprising two longitudinally extending rasping halves each said half having, in cross-section, a relatively broad outer surface portion extending between two inwardly directed, relatively narrow, edge portions, the corresponding edge portions of said rasping halves being disposed adjacent to each other so that said halves, together, conform generally to the shape of the bone cavity to be produced, said halves further including cutting teeth on the outer surfaces thereof;
Dependencies are inferred from the claim text.