FIRE DOOR LOCK WITH LATCH BOLT IMMOBILISER Russian patent published in 2019 - IPC E05B65/10 

FIELD: fire-fighting equipment.

SUBSTANCE: present invention discloses a lock for a fire door with a latch blocking device, which comprises housing (9), characterized by central axis (14) of symmetry and presence of equidistant holes for lock cylinders (12) made above and below central axis (14) for use in doors that open from right to left or from left to right, as well as the presence of latch (5), which extends forward from front plate (10) of lock at the level of central axis. Lock includes latch bolt (6), which is connected to traction bar (7) and thrust plate (8) and which is configured to move in locking position in horizontal direction and synchronously with said elements after actuation of drive (13), located on cylinder (12) of lock, preventing contact between drive arm (2a) of pivoted lever (2) and drive lug (7a) of pull bar (7) when performing rotary movement.

EFFECT: lock of a fire-prevention door with a latch blocking device is disclosed.

1 cl, 11 dwg