LOCK WITH SAFETY LATCH Russian patent published in 2011 - IPC E05B27/00 

FIELD: construction.

SUBSTANCE: lock (1) with safety latch (9), comprising a box-like protective casing (2), a rotary bush (7), a latch (9), made with the possibility of sliding from the opened position into the position, when it protrudes from the face plate (6) of the boxlike body (2) under action of the bush (7), a cylinder (10), equipped with a bit, which may rotate under action of the appropriate key (or a seat with appropriate lever mechanisms for a key with an arm), and a bolt (11), which is connected with a bit by means of transmission facilities. The yoke (12) is hingedly connected to a box-like body (2) and is arranged with a groove (17). The lever (18) is rigidly connected to the bush (7). The yoke (12) may move from the position, in which the bolt (11a, 11b) is in disengaged position, and the rotary motion of the bush (7) is rigidly connected to the latch (9) opening into the second position, when the bush (7) movement is independent on the latch (9).

EFFECT: arrangement of a lock, the latch of which is in stable engagement with an appropriate seat in the wall.

10 cl, 5 dwg