# US 2014/0155911 A1 · Cutting apparatus for joint cutting system using robot > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155911 A1 - Document ID: US20140155911A1 - Status: Published application - Kind: A1 - Application number: 14/092,355 - Filed: 2013-11-27 - Published: 2014-06-05 - Earliest claimed: 2012-11-30 - Assignees: Curexo, Inc. - Applicants: Curexo Co., Ltd. - Inventors: Chang Hun SONG; YoungBae PARK; ChangHun LEE; DongHyun SON - Web page: https://patentgrep.com/patent/US20140155911A1 ## CPC - A61B 34/30: Surgical robots - A61B 17/1633: {Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft (A61B17/1644 takes precedence)} - Y10S 901/41: Tool - A61B: DIAGNOSIS; SURGERY; IDENTIFICATION (usefulness limited to only animals A61D) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A cutting apparatus for joint cutting system using robot includes a shaft combined with a motor in a part of a robot arm, a cutter having a cutting head at the end of the shaft, a sleeve in which the shaft is inserted, and a cutter support member having a sleeve base where the sleeve is fixed, characterized in that the sleeve is a standalone member of a hollow bar with a center hole and is separable from and combinable with the sleeve base. The sleeve and the sleeve base are so separable that it is possible to reinforce the strength of the sleeve, which retrains the bending force to the sleeve, though the diameter of the sleeve is minimized. ## Claims ### Claim 1 A cutting apparatus for joint cutting system using robot comprising; a shaft combined with a motor in a part of a robot arm, a cutter having a cutting head at the end of the shaft, a sleeve in which the shaft is inserted, and a cutter support member having a sleeve base where the sleeve is fixed, characterized in that the sleeve is a standalone member of a hollow bar with a center hole and is separable from and combinable with the sleeve base. ### Claim 2 (depends on 1) A cutting apparatus of claim 1, wherein the sleeve has support bearings which are equipped in the center hole and support the shaft 11 such that the shaft 11 is rotatable, and in order to reinforce the strength against the bending force the support bearings are located in the front side and the back side of the sleeve, which minimizes the reduction of the thickness of the sleeve. ### Claim 3 (depends on 2) A cutting apparatus of claim 2, wherein the sleeve base comprises a base body with middle hole part, first base join part formed on the inner circular surface around the front end of the sleeve base and combined with the back end of the sleeve, second base join part formed on the inner circular surface around the back end of the sleeve base and combined with the part of the robot arm, and a washing water discharging hole formed in the base body for discharging washing water; and the sleeve comprises a sleeve body of a hollow bar shape, a join body with sleeve join part combined with the first base join part at the back end of the sleeve body, bearing install grooves located apart each other on the inner circular surface of the sleeve body for equipping the support bearings, reinforcing part for reinforcing against the bending force to the sleeve body which is protruded toward center of the center hole from the inner circular surface between the bearing install grooves. ### Claim 4 (depends on 3) A cutting apparatus of claim 3, wherein the bearing install grooves consist of first bearing install groove formed on the inner circular surface of the join body with the sleeve join part and second bearing install groove formed on the inner circular surface around the front side of the sleeve body, and the support bearings consist of first support bearing combined at the front side of the first bearing install groove, second support bearing combined at the back side of the second bearing install groove, third support bearing combined at the back side of the first bearing install groove, and the fourth support bearing combined at the second bearing install groove. ### Claim 5 (depends on 4) A cutting apparatus of claim 4, Wherein each of the first to fourth support bearings has multiple bearings consecutively arranged, the outside surface of which comes into contact with the first or second bearing install groove and the inside surface of which comes into contact with the outer circular surface of the shaft, further comprising reinforcing spacers which are equipped on the inner circular surface of the sleeve between the second and fourth support bearings and between the first and third support bearings and which has a center hole where the shaft is inserted. ### Claim 6 (depends on 1) A cutting apparatus of claim 1, further comprising: end spacers for retraining the fluctuation of the shaft which are inserted in the front and back ends of the center hole of the sleeve and have a center hole where the shaft is inserted. ### Claim 7 (depends on 1) A cutting apparatus of claim 1, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%. ### Claim 8 (depends on 7) A cutting apparatus of claim 7, wherein the number of the cutters is 5 and the outer diameter of the cutting head is 6.2 mm within a tolerance of 10%. ### Claim 9 (depends on 7) A cutting apparatus of claim 7, wherein the cutters have roughing groove for improving machinability, and the outer diameter of the cutting head is 6.2 mm within a tolerance of 10%. ### Claim 10 (depends on 2) A cutting apparatus of claim 2, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%. ### Claim 11 (depends on 3) A cutting apparatus of claim 3, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%. ### Claim 12 (depends on 4) A cutting apparatus of claim 4, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%. ### Claim 13 (depends on 5) A cutting apparatus of claim 5, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%. ### Claim 14 (depends on 6) A cutting apparatus of claim 6, wherein the cutting head has multiple cutters protruded equi-angularly at a head core, and the outer diameter of the cutting head corresponds to the diameter of a fixing protrusion of the knee joint implant or is bigger than the diameter of the fixing protrusion by within 10%.