LOCK Russian patent published in 1994 - IPC

FIELD: locking-in of garage gate. SUBSTANCE: the lock has a casing with vertical holes to receive the ends of the shackle with grooves and horizontal ducts to receive the spring-loaded racks engageable with the shackle grooves. The axes of the holes and ducts are in the same vertical plane, and the grooves are shifted relative to one another in the vertical direction at a distance equal to the distance between the duct axes. The teeth of the rack are inclined relative to the teeth of the other rack in the opposite directions and their thickness and pitch differ from the teeth of the other rack. A through slot is made between the teeth to receive a double-ended pressure key with mating inclined cavities engageable with the rack teeth at a release of the lock. EFFECT: reliable locking-in. 4 cl, 4 dwg