DOOR LOCK Russian patent published in 2003 - IPC

FIELD: hardware. SUBSTANCE: door lock has body accommodating guide cross bar, retainer located in recess and spring. Cross bar has combination cutouts for engagement with key cutouts. Lock is made nonseparable after its mounting on door due to nondetachable retainer in form of screw running through cross bar, with screw head sunk in cross bar body and located on side of door leaf in body hole which is closed after lock mounting by door leaf, and nut on screw thread after adjustment and mounting is blocked, for instance, by welding, and serves as handle for opening of cross bar on room side. EFFECT: higher operate reliability of lock. 3 cl, 4 dwg