Patent ID: 7533892

Claim:
A mobile medical equipment system comprising: a mobile base to movably support medical equipment, the mobile base including a chassis having a left side, a right side, a front side, and a back side; at least one non-steerable wheel coupled to the chassis near the front side, the at least one non-steerable wheel to rotate to roll the mobile medical equipment system over a floor; a first steerable wheel and a second steerable wheel spaced apart and pivotally coupled to the chassis near the back side, the first and second steerable wheels to steer the mobile medical equipment system around the floor; and a steering system coupled to the chassis and the first and second steerable wheels, the steering system to receive directional input from a user and couple the directional input to the first and second steerable wheels, the steering system including a pair of cam plates pivotally coupled to the chassis, the pair of cam plates having angled arms coupled to the first and second steerable wheels to respectively form a first wheel angle and a second wheel angle, the pair of cam plates further having a pair of cam follower slots, a pair of short links pivotally coupled in parallel to the chassis, the pair of short links having a pair of cam followers inserted into the pair of cam follower slots to pivot the pair of cam plates, a long link coupled between the pair of short links, the long link to pivot the pair of short links, and a tiller link pivotally coupled to the chassis and the long link, the tiller link to laterally sweep the long link.