Patent ID: 9745762
Date: 2017-08-29
CPC Classifications: E04F,E04G

Claim:
1. A vertically raising safety rail comprising: a moveable top rail; a base; a moveable center rail assembly positioned above the base and below the top rail; a drive shaft; a motor that provides rotational power to the drive shaft; a pair of spaced apart lower linkage arm assemblies that is operably connected to the base and to the center rail assembly; said pair of lower linkage arm assemblies being movable relative to the base and the center rail assembly when a rotational force is applied to the drive shaft and configured to move the center rail assembly relative to the base; and a pair of spaced apart rotating upper linkage arm assemblies that is operably connected to the center rail assembly and the top rail; said pair of upper linkage arm assemblies operably movable relative to the lower linkage arm assemblies to move the top rail relative to the center rail assembly; wherein each said lower linkage arm assembly is operably connected to its corresponding said upper linkage arm assembly at a midpoint mesh gear assembly which has gears connected by a gear plate directly connected to a center rail of the moveable center rail assembly.