Patent ID: 9132286
Filing Date: 2015-09-15
Classification: A61N

Abstract:
1. A radiotherapy particle emitter positioning device comprising; first and second arcuate support frames, each arcuate support frame including a drive track arrangement defining an arcuate carriage guide path; a mounting carriage supported by the support frames, the mounting carriage connectable to the drive track arrangements and moveable along the carriage guide path; the mounting carriage including a drive arrangement engaging the drive track arrangements for driving the mounting carriage along the drive track arrangements; and wherein the arcuate carriage guide path is defined between two predetermined positions between which the mounting carriage is permitted to travel, the two predetermined positions being spaced apart along the carriage path to provide at least 180 degrees of travel by the mounting carriage along the carriage guide path; wherein the first drive track arrangement includes a first gear rack arrangement and a second drive track arrangement includes a second gear rack arrangement; and the drive arrangement including a four point drive arrangement including first and second spaced apart pinion gears engaging the first gear rack arrangement and third and fourth pinion gears engaging the second gear rack arrangement, the first and third pinion gears operably coupled for coordinated driving of the mounting carriage and the second and fourth pinion gears operably coupled for coordinated driving of the mounting carriage.