US Patent 7246411 Methods and systems for sliding windows and doors

An adjustable mechanism for sliding panels, such as sliding windows and doors is disclosed. One embodiment comprises adjustable buttons that extend from a housing positioned in the sliding panel. The adjustable threaded buttons of the present invention provide a surface having reduced friction that extends from the bottom edge of a window or door and that can slide along a track supporting the window or door. In addition to providing a mechanism to facilitate horizontal sliding of a window or door, the adjustable buttons may be used to set the height of the sliding window or door as it sits in its frame.