Patent ID: 8813424

Claim:
A device to limit an opening of a window having a sash hingedly coupled to a window frame; comprising: a sash bracket adapted to attach to the sash; a limiting arm operably coupled to the sash bracket, the limiting arm presenting a first end and a second end, the first end of the limiting arm pivotally coupled to the sash bracket, the limiting arm further including a track engagement structure proximate the second end; a biasing element operably coupled to the limiting arm; and a track assembly adapted to attach to the window frame, the track assembly including a track and a release assembly, the track presenting a first end and an opposing second end and having a first opening for admitting the track engagement structure proximate the first end, the track engagement structure of the limiting arm being longitudinally slidable in the track, the release assembly disposed proximate the second end of the track and selectively operable to release the track engagement structure from engagement with the track through a second opening in the track to allow the sash to be moved to a fully open position, and wherein the biasing element positions the limiting arm such that the track engagement structure is aligned with the first opening for admitting the track engagement structure in the track, so that as the sash is shifted from the fully open position toward a closed position, the track engagement structure engages in the track without operator intervention.