DOOR BLOCK Russian patent published in 1997 - IPC

FIELD: construction; designs of doors; applicable in building and rooms of various purposes. SUBSTANCE: door block has door which consists of two leaves connected with door casing. Door is hinged to door frame installed in aperture of wall. Door is installed on door frame with the help of hinged lower support and coaxial upper support located, respectively, on the lower and upper ends of the door and do not coming to door outside. Door frame is profiled on the side of support so that it closes the gaps with the door closed and serves as limiter for door turning during its opening. EFFECT: higher efficiency. 2 dwg