# US 9,750,583 B2 · Fixture remover for implant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,750,583 B2 - Document ID: US9750583B2 - Status: Granted - Kind: B2 - Application number: 14/487,900 - Filed: 2014-09-16 - Published: 2016-03-10 - Granted: 2017-09-05 - Earliest claimed: 2014-09-04 - Assignees: Ducksu Hur; Jun Song - Applicants: Ducksu Hur; Jun Song - Inventors: Ducksu Hur - Web page: https://patentgrep.com/patent/US9750583B2 ## CPC - A61C 8/0089: {Implanting tools or instruments} - A61C 8/0022: {Self-screwing (A61C8/0028 takes precedence)} - A61C 8/0068: {with an additional screw} - A61C 8/0069: {tapered or conical connection} - A61C: DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE (non-driven toothbrushes A46B; {tongue scrapers A61B17/24;} preparations for dentistry A61K6/00; preparations for cleaning the teeth or mouth A61K8/00, A61Q11/00) ## Abstract Disclosed is an implant fixture remover. The fixture remover includes a remover screw which has a first thread formed on one side thereof to be screwed to a female screw portion of an implant fixture implanted into an alveolar bone, and a second thread formed on the other side thereof; and a remover driver including a torque transmitting portion which is slide-inserted into the remover screw, and a torque providing portion which is separated from the torque transmitting portion and screwed to the second thread so that the torque transmitting portion maintains contact with the fixture. ## Claims ### Claim 1 An implant fixture remover comprising: a remover screw including a first thread formed on one side thereof to be screwed to a female screw portion of an implant fixture implanted into an alveolar bone, and a second thread formed on the other side thereof; and a remover driver including a torque transmitting portion slide-inserted onto the remover screw, and a torque providing portion formed to be separated from the torque transmitting portion and directly screwed to the second thread so that the torque transmitting portion maintains direct contact with the fixture, wherein a degree of slide insertion of the torque transmitting portion onto the remover screw is determined based on a degree of direct screw coupling of the torque providing portion and the second thread, wherein a force, which is applied to facing surfaces of the torque providing portion and the torque transmitting portion by a torque generated by turning the torque providing portion after the torque providing portion is directly screwed to the second thread, is transmitted to the fixture through the torque transmitting portion and works as a repulsive force so that the fixture is extracted from the alveolar bone, and wherein the torque transmitting portion is pressurized toward the fixture in a direct contact state with the fixture. ### Claim 2 (depends on 1) The fixture remover of claim 1, further comprising a connection portion connecting the torque transmitting portion to the torque providing portion so that the torque providing portion is screwed to the second thread and so that the torque transmitting portion and the torque providing portion co-act. ### Claim 3 (depends on 2) The fixture remover of claim 2, wherein the connection portion allows the facing surfaces to be in contact with each other before the torque providing portion is screwed to the second thread. ### Claim 4 (depends on 2) The fixture remover of claim 2, wherein the torque providing portion and the torque transmitting portion respectively comprises a first concavity and a second concavity recessed in a circumferential direction, and further comprises a first elastic ring and a second elastic ring respectively inserted into the first concavity and the second concavity and elastically deformed by contacting the connection portion so that the torque providing portion and the torque transmitting portion are temporarily fixed to coact by the connection portion. ### Claim 5 (depends on 1) The fixture remover of claim 1, wherein a direction of the first thread is formed to be opposite a direction of the second thread. ### Claim 6 (depends on 1) The fixture remover of claim 1, wherein the facing surfaces are defined by at least two normal vectors. ### Claim 7 (depends on 1) The fixture remover of claim 1, wherein the facing surfaces are symmetrically formed based on a virtual plane including a central axis. ### Claim 8 (depends on 7) The fixture remover of claim 7, wherein the facing surfaces comprise: a first facing surface having a first slope based on the central axis; a second facing surface formed continuously with the first facing surface and having a second slope greater than the first slope; and a third facing surface formed continuously with the second facing surface and having a third slope greater than the second slope. ### Claim 9 (depends on 8) The fixture remover of claim 8, wherein the third facing surface is perpendicular to the virtual plane including the central axis. ### Claim 10 (depends on 8) The fixture remover of claim 8, wherein the first facing surface, the second facing surface, and the third facing surface are each provided in a plural number and formed spaced apart from each other. ### Claim 11 (depends on 8) The fixture remover of claim 8, wherein the number of the third facing surfaces is smaller than that of the first facing surface and the second facing surface. ### Claim 12 (depends on 1) The fixture remover of claim 1, wherein the facing surfaces of the torque providing portion and the torque transmitting portion are formed corresponding to each other. ### Claim 13 (depends on 1) The fixture remover of claim 1, wherein the torque transmitting portion includes a concave-convex contact surface in contact with the fixture so that a pressure applied toward the fixture, which is generated by the torque providing portion, is increased.