Patent ID: 6558394
Filing Date: 2003-05-06
Classification: A61F

Abstract:
A surgical cast cutter comprising:a first housing extending in the longitudinal direction, having an opening at the bottom of the front end which is closed by a stop plate, a motor having a front axle extending to the front end of said first housing, a transmission connected to said front axle and which changes the speed of a first output axle, which is parallel to said front axle, to predetermined revolutions, a second output axle which is perpendicular to said first output axle and passes through said opening, a set of bevel gears which converts rotation centered on said first output axle to rotation centered on said second output axle and which is provided with an integrated cylindrical portion on the output side, and a third output axle which is connected to said cylindrical portion in a key connection manner; a second housing including a built-in cutting tool which is comprised of a first shank, a cutting portion, and a second shank and connected to said third output axle in a key connection manner with interposed bearings on each of said first and second shank, and a protrusion comprised of a first portion extending parallel to said cutting tool and a second portion which is integrated with the front end of said first portion and extends from the front end of said first portion in a perpendicular direction to the cutting tool and having a second aperture formed thereon; a cascaded first joint to which said stop plate is coupled on the top and which the bottom thereof is joined to the said second housing having threaded portions on the top outer circumference, and through which the first shank of said cutting tool is passed; a second joint of which the top thereof is coupled to said stop plate and which the bottom thereof having a shape corresponding to the cascaded shape of said first joint in the inner circumference and receiving said first joint; a hood having a threaded aperture formed on the top portion perpendicular to the cutting tool, an L shaped nipple-type connector formed on one side, and coupled by a bolt to the second housing on which a slot shaped groove is formed on a position corresponding to said aperture and parallel to said cutting tool; and a spring interposed between said second joint and said hood.