Brake Shoe and Stop that Interlock to Prevent Window Sash Drift During Use

摘要

A system and method for inhibiting inadvertent movement of a window sash out of a fully open position. The window sash is set in guide tracks. The window sash engages brake shoes that travel up and down in the guide tracks. A stop is mounted within the guide tracks. The brake shoe and the stop have a connector that joins the brake shoe to the stop when the window sash is moved to its fully open position. The brake shoe is separable from the stop when a closing force is manually applied to the window sash. The force applied must exceed a threshold level. In this manner, the window sash will remain in its fully open position and will not inadvertently drift closed due to gravity, vibrations, or friction with another window sash.

主权项

1. In a window having a window sash that travels in guide tracks as said window sash moves between a fully open position and a fully closed position, a system for inhibiting drift movement of said window sash out of said fully open position, said system comprising:
a brake shoe coupled to said window sash that moves in one of said guide tracks as said window sash is manually manipulated between said fully closed position and said fully open position; a stop mounted to said one of said guide tracks at a fixed elevation, wherein said brake shoe and said stop contact when said brake shoe is in said fully open position; and a connector that automatically interconnects, said brake shoe and said stop as said brake shoe and said stop come into contact, wherein said connector prevents said brake shoe from moving away from said stop until a threshold separating force is applied to said window sash to move said sash from said fully open position towards said fully closed position.