CONTROLLED PASSAGE PROVISION DEVICE Russian patent published in 2007 - IPC E06B3/90 

FIELD: construction, particularly window sashes, door leaves, or like elements for closing openings.

SUBSTANCE: device includes leafs, guiding means, drive, remote-control panel, safety members, locking systems, drain and culvert systems. Device also has fixers, annular vehicle rotation platform arranged inside concentric annular guiding means and installed on room floor. The annular vehicle rotation platform is adapted for vehicle rotation about central axis. Leafs are made as two segment pairs. Concentric annular guiding means are arranged in space between side room walls so that two annular guiding means is connected to room ceiling and two ones are located on room floor. Segments produced of transparent material are supported by inner guiding means. Segments formed of solid opaque material are installed in outer guiding means. Fixers are made as rectangular prisms arranged in grooves of upper and lower concentric annular guiding means and adapted for gate blocking without lock usage.

EFFECT: increased reliability.

10 cl, 1 dwg