Abstract: A surgical tool driver has a driven end connectable to a rotary drive source and a driving end connectable to a surgical tool. A shaft assembly there between includes a hollow outer shaft and a flexible drive shaft for transmitting rotary power from the driven end to the driving end. The shaft assemble is curved for bypassing anatomical features in a patient.

Abstract: An orthopaedic reamer for cutting bone includes a rotatable shaft and a cutting head coupled with the shaft. The cutting head includes a distal face with a radius and a plurality of cutting teeth. Each cutting tooth includes a pair of opposed side walls extending from the distal face and a cutting edge extending between the side walls. Each cutting edge includes at least three adjoining segments. Each segment has a radius which is less than the radius of the distal face.

Abstract: A patellar milling clamp is provided with a depth control for limiting and controlling the milling depth of a grater rotated against a bone secured in the milling clamp. A stop ring is provided on a shaft of the milling tool. The shaft is slidable in a guide bushing of the milling clamp, and a rotatable cap on the guide bushing is selectively engaged in notches in the guide bushing to provide an abutment surface at selectively different elevations. Further advancement of the tool is prevented when the stop ring abuts the abutment surface of the cap. The depth of milling is precisely controlled regardless of the original thickness of the patellar bone being milled.

Abstract: A tool driver including a shaft having a longitudinal axis and opposite ends. A first partial boss is located at one of the shaft ends, a tool collet at the other of these shaft ends, and a second partial boss having a bore extending therethrough. The second partial boss being positioned on the shaft with the shaft in the bore. There is a stop on the shaft. The second partial boss is slidable on the shaft between the first partial boss and the stop. A spring is positioned between the second partial boss and the stop. The spring urges the second partial boss into engagement with the first partial boss. The first and second partial bosses are complementary to each other and are in engagement with each other defining a bayonet type latch mechanism. The latch mechanism has an axially extending inwardly tapered bore extending from one end coaxially of the shaft into the first and second bosses.

Abstract: A surgical tool driver has a driven end connectable to a rotary drive source and a driving end connectable to a surgical tool. A shaft assembly there between includes a hollow outer shaft and a flexible drive shaft for transmitting rotary power from the driven end to the driving end. The shaft assemble is curved for bypassing anatomical features in a patient.

Abstract: A patellar milling clamp is provided with a depth control for limiting and controlling the milling depth of a grater rotated against a bone secured in the milling clamp. A stop ring is provided on a shaft of the milling tool. The shaft is slidable in a guide bushing of the milling clamp, and a rotatable cap on the guide bushing is selectively engaged in notches in the guide bushing to provide an abutment surface at selectively different elevations. Further advancement of the tool is prevented when the stop ring abuts the abutment surface of the cap. The depth of milling is precisely controlled regardless of the original thickness of the patellar bone being milled.

Abstract: A new and improved reamer having a plurality of openings therein. Each of the openings have a periphery and a cutting edge selected from the periphery. Each of the cutting edges are bound by opposite portions of the periphery. The opposite portions are extended past the cutting edge in a direction opposite of the direction transverse of the cutting edge whereby the cutting edge may be shaped as desired independently of the shape of the periphery.

Abstract: A new and improved reamer having a plurality of openings therein. Each of the openings have a periphery and a cutting edge selected from the periphery. Each of the cutting edges are bound by opposite portions of the periphery. The opposite portions are extended past the cutting edge in a direction opposite of the direction transverse of the cutting edge whereby the cutting edge may be shaped as desired independently of the shape of the periphery.

Abstract: A method for making an acetabular reamer for an acetabular reamer comprising the steps of: fabricating a bowl shaped cup-blank having outer and inner bowl shaped surfaces, perforating a plurality of holes through the cup-blank, the holes each are surrounded by a curved margin, deforming outwardly of the outer surface a cutting portion of the margin of each of the holes, thereby forming cutting edges, the cutting portions are curved outwardly of the outer surface, the cutting edges are curved tangentially of the outer surface and disposed to cut upon rotation of the acetabular reamer.

Abstract: A new and improved tool driver having a shaft with a longitudinal axis and opposite ends, a boss is secured at one of the shaft ends by which the tool driver is connected to a rotary tool. A tool collet is secured to the other of the shaft ends by which the tool driver may be driven by a surgical hand piece having a chuck in which the collet may be positioned. The boss is equipped with a securing device of the bayonet type having a latch mechanism which holds the rotary tool on the boss coaxially of the driver during use. In a specific embodiment, the tool driver boss comprises a first partial boss secured to the shaft. A second partial boss having a bore extending therethrough is positioned on the shaft. A stop is positioned on the shaft and a spring is positioned on the shaft between the stop and the second partial boss. The spring urges the two partial bosses together.

Abstract: A tool driver having a shaft with a longitudinal axis and opposite ends. A boss is secured at one of the shaft ends by which the tool driver is connected to a rotary tool. A tool collate is secured to the other of the shaft ends by which the tool driver may be driven by a surfical hand piece having a chuck in which the collate may be positioned. The boss is equipped with a securing device of the bayonet type having a latch mechanism which holds the rotary tool on the boss coaxially of the driver during use. The securing device has a tapered bore extending from the distal end of the boss axially of the shaft. The rotary tool has a diametral bar extending across a bottom tool driver opening with a centrally located circular disk therein. The disk of the rotary tool fits within the bore of the tool shaft boss so as to concentrically locate the rotary tool and the tool shaft on the same axis.

Abstract: In the broader aspects of the invention, there is provided a new and improved tool driver having a shaft with a longitudinal axis and opposite ends and tools therefor. A boss is secured at one of said shaft ends by which the tool driver is connected to a rotary tool. A tool collate is secured at the other of the shaft ends by which the tool driver may be driven by a surgical hand piece having a chuck in which the collate may be positioned. The boss has a surface which engages the tool and positions the tool exactly coaxially of the tool driver. A latch mechanism is provided to hold the rotary tool on the boss, whereby the rotary tool is held exactly coaxially of the driver during use. The rotary tool which is used with the driver has a bottom tool driver opening which has the same dimensions as the boss of the tool driver of the invention. The boss thus fills the opening and the opening is complementary to the boss.

Abstract: A method for making an acetabular reamer for an acetabular reamer comprising the steps of: fabricating a bowl shaped cup-blank having outer and inner bowl shaped surfaces, perforating a plurality of holes through the cup-blank, the holes each are surrounded by a curved margin, deforming outwardly of the outer surface a cutting portion of the margin of each of the holes, thereby forming cutting edges, the cutting portions are curved outwardly of the outer surface, the cutting edges are curved tangentially of the outer surface and disposed to cut upon rotation of the acetabular reamer.

Abstract: A new and improved tool driver having a shaft with a longitudinal axis and opposite ends. A boss is secured at one of said shaft ends by which the tool driver is connected to a rotary tool. A tool collate is secured at the other of the shaft ends by which the tool driver may be driven by a surgical hand piece having a chuck in which the collate may be positioned. The boss has a distal end surface with a groove therein. Both the groove and the distal end surface extend transversely of the axis. A pin is positioned in the groove on the axis. A latch mechanism is provided to hold a mounting bar of a rotary tool in the groove on the pin, whereby the rotary tool is held exactly coaxially of the driver during use. The rotary tool which is used with the driver has a bar which has the same dimensions as the groove in the boss of the tool driver of the invention. The bar thus fills the slot and is complementary to the slot. The bar has a hole therein which is complementary to the pin.

Abstract: A tool driver comprising a shaft having a longitudinal axis and opposite ends. A tool base is secured to the shaft at one of the ends. A plurality of tool engaging arms extend generally radially outwardly of the tool base and the shaft. The arms are moveable radially outwardly of the shaft between a tool engaging position and a retracted position. An arm actuator is positioned on the shaft to retract and extend the arms. The other end of the shaft is shaped so as to be engageable with the chuck or collet of a tool driver.

Abstract: A method for making an acetabular reamer for an acetabular reamer comprising the steps of: fabricating a bowl shaped cup-blank having outer and inner bowl shaped surfaces, perforating a plurality of holes through the cup-blank, the holes each are surrounded by a curved margin, deforming outwardly of the outer surface a cutting portion of the margin of each of the holes, thereby forming cutting edges, the cutting portions are curved outwardly of the outer surface, the cutting edges are curved tangentially of the outer surface and disposed to cut upon rotation of the acetabular reamer.

Abstract: A disposable cutter which has a plurality of cutting edges. The cutter has perforations adjoining the cutting edges. The cutter defines an axis of rotation. The cutter is joined to a transparent bowl. The bowl is concentric with the axis of rotation. The bowl has a bottom tool driver opening concentric with the axis of rotation.

Abstract: A shielded universal joint having a pivot head defining a primary axis. The pivot head has a ball and a neck. The ball has a longitudinal slot. The slot has a throat at the center of the ball. The imperfect socket head is provided having a socket and a pin. The socket defines a secondary axis. The socket has a cavity concentric with the secondary axis. The cavity closely receives the ball. The socket has a continuous margin. The pin is joined to the socket in spaced relation to the margin. The pin extends through the passage. The pin defines a first pivot axis extending longitudinally through the pin. The pin and the throat define a second pivot axis extending through the throat and the pin perpendicularly to the first pivot axis. The socket head is simultaneously pivotal relative to the ball about both of the pivot axes.

Abstract: A tool driver comprising a shaft, a shank, a flange, a clamp and a retainer. The shaft has a longitudinal axis and opposed ends. The shank is joined to one end of the shaft. The flange is joined to the other end of the shaft and has an outwardly facing flange surface extending from the shaft transversely of the axis. The clamp has a clamping surface facing the flange surface. The clamp is movable axially relative to the flange to vary the separation of the surfaces. The retainer is operatively connected to the clamp and is movable relative to the clamp between a first position and a second position. The retainer, in the first position, precludes relative movement of the clamp and the flange.

Abstract: An acetabular reamer cup having a cutting bowl having a plurality of singly curved cutting edges. The cutting bowl has a plurality of slots proceeding the cutting edges. The cutting bowl defines an axis of rotation. A bottom is joined to the cutting bowl. The bottom has a tool driver opening concentric with the axis of rotation.