A lock assembly for a door includes a lock body having a housing with at least one deadbolt supported in the housing for movement between a retracted position and an extended position and biased toward the extended position by a spring, and a trigger mechanism mounted on the door separate from the lock body for engagement with a door jamb upon closure of the door, said trigger mechanism being adapted to hold the at least one deadbolt in the retracted position when the door is open in opposition to a spring bias, and to permit movement of the at least one deadbolt to the extended position upon engagement of the trigger mechanism with the door jamb.

A lock for securing to a movable body (1) and for cooperating with a strike plate (12) on a stationary body (11), which lock is movable away from the strike plate (12) for opening the movable body (11), which lock is movable into juxtaposition with the strike plate (12) for closing the movable body (11) and which lock comprises a casing (3) which includes a rotatable trigger (8) which is positioned in the casing (3) and a locking member (7) which is also positioned in the casing (3) and wherein; the rotatable trigger (8) projects from the casing (3); the rotatable trigger (8) rotates about an axis of rotation positioned on a front working plane of the casing (3) such that the rotatable trigger (8) rotates into the casing (3) and out of the casing (3) with the rotatable trigger (8) being spring biased to rotate out of the casing (3); the locking member (7) is movable between a projected position in which the locking member (7) projects from the casing (3) and a retracted position in which the locking member (7) is retracted into the casing (3); the locking member (7) is configured to move into the projected position when the rotatable trigger (8) rotates into the casing (3); the locking member (7) is configured to move into the retracted position when the rotatable trigger (8) rotates out of the casing (3); the locking member (7) moves into a locked position when the lock is brought into juxtaposition with the strike plate (12) such that the rotatable trigger (8) rotates into the casing (3) as it comes into juxtaposition with the strike plate (12), whereby the locking member (7) projects from the casing (3) such that the locking member (7) moves into a recess in the strike plate to lock the movable body (1) and: • when the lock is moved out of juxtaposition with the strike plate (12) the rotatable trigger (8) rotates out of the casing (3) and the locking member (7) moves into the retracted position.

An attack, ballistic and blast resistant door that includes integral concealed mortised four bolt-strike locking assemblies where the bolts are retracted with one hand operation for opening the door and are automatically extended for locking the door with closure of the door. The door has a door frame with four adjustable concealed striker receivers within the door frame. The door has four interconnected concealed mortised bolt lock assemblies, each with a biased bolt, wherein one of the bolt lock assemblies has an engageable brake to hold all four interconnected biased bolts in retraction when the door is opened after a handle interconnected with the four biased blots is moved to a door open position. A roller assembly is provided in the one bolt lock assembly biased to extend and move out from the door when the door is opened and releases the brake and allows the biased bolts to extend and move into the strike receivers when the extended roller assembly is moved inwardly toward the door. A manually adjustable ramp is on a strike plate cover over the strike receiver opposite of the one bolt lock assembly with the engageable brake. The ramp adjustably engages the roller assembly to further move away from or toward the door to adjustably release the brake.

A lock with an emergency unlocking feature includes a latch bolt, a top rotation member, a restriction plate and a driving member. The driving member is connected to the deadbolt. When the top rotation member is rotated from a close position to an open position while the lock is locked, a restriction member drives the restriction plate to press a resilient unit. The restriction plate is moved to disengage the engaging member on the restriction plate from the second notch of the driving member. The guide slot of the transmission plate pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the open position. When in an emergency situation, the user rotates the handle to retract both of the deadbolt and the latch bolt without using a key to unlock the deadbolt to save time.

Closing device (1) with a pusher (17), a closing and opening mechanism (7) comprising at least one locking element (9), wherein the at least one locking element (9) movable by means of a latch spring (19) from an open position into a closed is characterized in that the locking spring (19) to assist the closing movement of the at least one locking element (9) in the open position has a first bias voltage by turning the pusher (17) can be generated.

A lock with an emergency unlocking feature includes a latch bolt, a top rotation member, a restriction plate and a driving member. The driving member is connected to the deadbolt. When the top rotation member is rotated from a close position to an open position while the lock is locked, a restriction member drives the restriction plate to press a resilient unit. The restriction plate is moved to disengage the engaging member on the restriction plate from the second notch of the driving member. The guide slot of the transmission plate pulls the second guide member to move the deadbolt to the unlocked position, and the latch bolt moves to the open position. When in an emergency situation, the user rotates the handle to retract both of the deadbolt and the latch bolt without using a key to unlock the deadbolt to save time.

A latch assembly for a door includes automatically deployable deadbolt. When the door is closed and the latch engages a strike plate, the deadbolt automatically extends into a corresponding opening in a door jamb to secure the door.

A lock assembly for a door includes a lock body having a housing with at least one deadbolt supported in the housing for movement between a retracted position and an extended position and biased toward the extended position by a spring, and a trigger mechanism mounted on the door separate from the lock body for engagement with a door jamb upon closure of the door, said trigger mechanism being adapted to hold the at least one deadbolt in the retracted position when the door is open in opposition to a spring bias, and to permit movement of the at least one deadbolt to the extended position upon engagement of the trigger mechanism with the doorjamb.

A latch assembly for a door includes automatically deployable deadbolt. When the door is closed and the latch engages a strike plate, the deadbolt automatically extends into a corresponding opening in a door jamb to secure the door.