Patent RU-2697607-C1 (RU)
Title: Palate expander
Inventor: MOON SUNG CHUL
IPC: A61C7/02
Filed: 2016-05-09
Granted: 2019-08-15
Abstract: FIELD: medicine. 
     SUBSTANCE: group of inventions relates to medical equipment, specifically to devices for expanding the palate and more specifically to devices for expanding the palate, which can expand the palate without applying force to teeth. Device for palate expansion comprises one pair of joints with bone screws and drive part. One pair of joints with bone screws is arranged so that they face each other. Each of one pair of joints with bone screws passes in one direction and has at least three holes made on it for bone screws. Drive part is located between one pair of joints with bone screws. When moving at least part of drive part in one direction, one pair of joints with bone screws moves in another direction. Width of the appliance is chosen during designing for fixation of the device for expansion of the palate to bones with displacement from 1 to 3 mm to the left and to the right from a median palatine suture. Drive part comprises a screw rod arranged between one pair of joints with bone screws parallel to one pair of joints with bone screws and having threaded sections of two types made on one end part and the other end part of the screw rod with thread of opposite directions. Screw rod comprises a part forming holes for the key arranged between one end part and the other end part of the screw rod. In the second embodiment, the palate expansion appliance comprises the above one pair of joints with bone screws and a drive part. Drive part comprises guide rod, one pair of connection units with transfer levers, motor, rotating wheel, one pair of wire ropes and at least one pair of transmission levers. Guide rod is located between one pair of joints with bone screws parallel to one pair of joints with bone screws. One pair of connection units with transfer levers is connected to one end part and the other end part of guide rod, respectively. Engine is connected with guide rod and comprises engine drive shaft. Rotary wheel is engaged with engine drive shaft. Each of one pair of wire ropes has one end part connected to corresponding one of one pair of units of connection with transfer levers, and other end part, which is movably connected with rotating wheel. Each of at least one pair of transfer levers has one end part pivotally connected to corresponding one of one pair of units of connection with transfer levers, and other end part, hingedly connected to corresponding one of one pair of units of connection with bone screws. In the third embodiment, the device for palate expansion comprises one pair of joints with bone screws and a drive part. Drive part comprises motor, rotating gear wheel, one pair of rectilinear moving elements and at least one pair of transfer levers. Engine is located between one pair of joints with bone screws and comprises engine drive shaft. Rotary gear wheel is connected with engine drive shaft. One pair of rectilinearly moving elements is located between one pair of joints with bone screws parallel to one pair of joints with bone screws, having teeth, made on one side in opposite directions, and located in gearing with rotating gear wheel. Each of one pair of transfer levers has one end part pivotally connected to each of one pair of rectilinear moving elements, and the other end part pivotally connected to corresponding one of one pair of joints with bone screws. 
     EFFECT: use of inventions makes it possible to provide sufficient expansion of the palate suitable for a treatment object. 
     26 cl, 9 dwg