A rail system for supporting a patient gantry including a fixed rail assembly
mounted
on a support surface and a service rail assembly releasably securable to the fixed
rail assembly. Each rail assembly includes a bar and a top rail. An alignment device
is provided for aligning the top rails of each assembly and is configured so that
the rails cannot be interchanged. A lever is provided for positively securing the
service rail assembly to either the fixed rail assembly or in a first receptor
defined by a mounting block secured to a bearing block and on which is mounted
the patient gantry. A toggle clamp includes a pin selectively received in a locating
hole defined in the fixed rail assembly. If the toggle clamp has not been engaged
and the lever does not engage the first receptor, the lever is received by a second
receptor to prevent derailment.
