US Patent 11174129 Integrated elevator sill drain

A threshold drain system for redirecting water entering an elevator shaft at an opening thereof is provided. The threshold drain system may include a catch channel and a sill plate. The catch channel may include a forward wall connectable to an interior wall of the elevator shaft along and below the threshold. The sill plate extends from a rearward wall of the catch channel and is offset rearward relative to at least a portion of a vertical surface of the finished floor facing the elevator shaft to define a rearward offset. The forward wall may include a flange extending from an upper end of the forward wall at an elevation lower than a bottom of the sill plate so as to define a vertical offset. The rearward offset and the vertical offset at least in part define a passageway configured to direct the water into the catch channel.