COUNTERBALANCING BRIDGE Russian patent published in 1995 - IPC

FIELD: civil engineering. SUBSTANCE: counterbalancing bridge is made in the form of two rotary cantilevers 1 forming transport treadway in its operating position. Each cantilever is joint to immovable arresting device 3 through vertical sleeve 4. Cantilevers may be turned around the arresting device and displaced in vertical direction. The cantilevers are provided with bearing rolls 5 with hollow axle. Cantilever 1 and folding- back visor 2 are interconnected using two axles 6 and connecting link 7. Stopping unit with rod 8 and spring 9 is installed on the cantilever and kinematically is connected to the visor using a rope passing through roll hollow axles to stop cantilevers at arresting device. For this purpose the arresting device has hole 11 for arresting unit rod. The bridge is kept in side niche 12 close to car access ramp to a hockey field. EFFECT: easy in use. 2 dwg