DOOR LOCK Russian patent published in 2008 - IPC E05B63/16 

FIELD: ironmongery, particularly door locks adapted to lock doors of residential and industrial building rooms.

SUBSTANCE: door lock comprises body receiving locking mechanism with executive member, cross-bar, cross-bar movement mechanism including the first rotary axis and outer handle supported by rotary axis, as well as fixing means for cross-bar retention in working position. Cross-bar movement mechanism is made as the first gear wheel fixedly secured to the first rotary axis and brought into constant engagement with the second and the third gear wheels. The second and the third gear wheels may rotate about axes mounted in the first and the second plates correspondingly. The plates have the first ends connected to the first rotary axis so that they may rotate about it and are spring-loaded towards the firth gear wheel fixedly connected to the second rotary axis. Toothed wheel is secured to the second rotary axis. Fingers are arranged at free end of the first plate and side projection of the second plate. Finger of the first plate may cooperate with the first and the second levers as lock is opened or closed correspondingly. The first and the second levers are carried by single axis and are spring-loaded towards the body. The first level may cooperate with executive mechanism. The second lever cooperates with projection formed on side cross-bar surface. Cross-bar has slide installed on face thereof and performing limited reciprocation along cross-bar axis so that in extreme slide positions slide cooperates with cross-bar. Slide has tongue-and-groove member brought into contact with said gear wheel. Cross-bar has through longitudinal slot extending for one section of cross-bar length and arranged from rear wall thereof. Fixing means adapted for cross-bar retention in working position is made as lever spring-loaded in transversal direction and having free end connected with finger created on the second plate projection through control rod. The lever has depression created on free lever end. The depression cooperates with cross-bar end. Said lever has roll fastened to free end thereof. The roll cooperates with projection created on slide from the side of through longitudinal slot in cross-bar.

EFFECT: increased reliability, improved protection against vandalism and operational convenience, extended service life.

5 cl, 3 dwg