Patent ID: 9521984
Filing Date: 2016-12-20
CPC Classification: A61B

Claim Text:
1. A mobile x-ray device comprising: a chassis; a telescopic column comprising a lower fixed portion connected to the chassis and rotatable relative to the chassis with respect to a first vertical axis, and at least one upper mobile portion being vertically moveable relative to the lower fixed portion; a telescopic arm connected to the upper mobile portion of the telescopic column and supporting at its end a head assembly which contains an x-ray emitter, the telescopic arm being horizontally extendable and retractable relative to the telescopic column, thus allowing the x-ray emitter to be moved further away or brought closer horizontally to the telescopic column; the telescopic arm further being vertically moveable relative to the upper mobile portion of the telescopic column; a cable connected to the upper mobile portion and the telescopic arm for providing the vertical movement of the mobile portion and telescopic arm in response to movement of the cable; a first mechanism housed within the fixed portion for balancing the weight of the mobile portion and the telescopic arm during the vertical movement thereof, the first mechanism including a block and tackle connected to the cable for multiplying the run of the cable, and a tension spring connected to and extending between the chassis and the block and tackle for storing potential gravitational energy of the upper mobile portion and telescopic arm in the form of elastic energy when the upper mobile portion moves downwardly and returns the stored energy when the mobile portion move upwardly, and a variable radius pulley receiving the cable; and a second mechanism housed within the upper mobile portion for balancing the weight of the telescopic arm and the head assembly, the second mechanism including at least one two-radii pulley and a recovery pulley, each connected to the cable.