A locking device (1), comprising:—a latch bolt arrangement (2), which is movable into at least a first and a second latch bolt position, said latch bolt arrangement (2) comprising a first follower arm engagement part (7); —a first follower arrangement (8) configured for transferring a motion to the latch bolt arrangement from a first unlocking device which can be connected to the first follower arrangement (8), wherein said first follower arrangement (8) comprises a first follower arm (11) which comprises a latch bolt engagement part (13) which is configured to at least in some positions of the first follower arm (11) contact the first follower arm engagement part (7) of the latch bolt arrangement (2), whereby the latch bolt arrangement (2) can be pushed by a movement of the first follower arm (11) such that the latch bolt arrangement (2) is moved from the first latch bolt position to the second latch bolt position; and —a locking arm (15), wherein said locking arm (15) further comprises a locking arm catch (19), whereby said locking arm (15) can be moved from the first locking arm position to the second locking arm position by pushing said locking arm catch (19), and wherein the first follower arm (11) further comprises a locking arm catch engagement part (21) which will push the locking arm catch (19) for moving the locking arm (15) towards the second locking arm position when the first follower arm (11) is moved for pushing the latch bolt arrangement (2) to the second latch bolt position.

The parts forming the force transmission connection from the spindle shaft of the handle of the lock body to the bolt include a spring, which is also arranged to transfer force. The spring is used to eliminate the protrusion of the bolt caused by tolerance variations, when the handle installed into the lock body is turned to its extreme position to open the door.

A door deadbolt device that can prevent a door from opening operates independently from the lockset installed on the door. The device is easily locked from the inside of the room with a one-handed motion using an insertable tool or key which may be carried separately or stored out of the reach of small children or unauthorized persons. The bolt is positioned so as to be pushed into a locking position under the tension of a spring, thereby easily and securely bolting the door. The present invention further allows the user to rapidly unbolt the door from inside the room also with a one-handed single motion. Optionally, the device can also be unbolted from the outside with a special tool.

A safety lock and access key for doors that otherwise need to remain locked comprising a lock body containing a spring biased catch extending from one end of the body to engage in a keep of the door frame, a lever for moving the catch into the body to unlock the door, and a tool for unlocking locked doors.

A lock with a long-travel deadbolt includes a first guide member and a loop-shaped rail. A driving member is slidably mounted to the first guide member and includes a second guide member and a third guide member. A third notch is defined in an underside of the driving member. An extension plate is eccentrically and pivotably connected to the second guide member. An extension slot is defined in the extension plate and the first guide member slidably extends through the extension slot. A stop plate is pivotably connected to the third guide member and has an extension portion which has a corner protruding from a side thereof. The third notch and the corner are located at the rail. When rotating the core, the first guide member moves from one end of the extension slot to the other end of the extension slot, the deadbolt travels at least 22 mm.

A lock with replaceable modules includes a first part and a second part which is connected to the first part. The lock has a latch bolt recess, a restriction recess and a deadbolt recess so as to selectively install a latch bolt, a restriction bolt and a deadbolt. A lock block is selectively installed in the restriction recess. The lock includes an installation slot which can be selectively oriented in different directions, and a core recess for receiving the deadbolt. The lock is selectively installed with different components by features of modularization and normalization so as to reduce inventory pressure. The customers may install the lock to entrance doors, gate doors, storage room doors, emergency doors, room doors, bathroom doors or the like.

The present invention relates to a symmetrical and reversible-clutch mortise lock comprising a central follower, a pair of symmetrical lateral followers, each one located on one side of the central follower to be activated by square bars of handles, a spacer which makes the movement of the two lateral followers independent and a motor, which connects to an actuation lever and which is activated when an access code is validated. The lock further comprises a clutch housed and guided in an accumulator arm able to move linearly to be housed in both lateral followers such that the corresponding lateral follower, when activated by the motion of the door handle, pushes the clutch until it makes contact with the central follower and activates the latch of the lock.

A bar handle with incorporated lock having a tubular element for gripping a handle, installed on a face of a door by way of interposition of at least one spacer element, and a lock which is at least partially contained inside the tubular element. The handle includes a release device for releasing the lock, which is configured to be operated manually with a pusher element installed on the tubular element. the handle comprises a release device for releasing the lock, which is configured to be operated manually with a pusher element installed on the tubular element.

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 locking device for a door located at a door frame having a door strike. The locking device includes an actuator having a neutral position and a displaced position, and a latchbolt assembly having an extended position configured to engage the door strike, and a retracted position configured to move past the door strike. The latchbolt assembly includes a latchbolt link configured to move the latchbolt in response to movement of the actuator. A first dampening device is disposed adjacent to the latchbolt link, with the dampening device resiliently engaging the latchbolt link as the latchbolt link moves from the retracted position to the extended position. The first dampening device limits movement of the latchbolt link. A second dampening device is configured to restrain movement of the latchbolt during movement from the retracted position to the extended position.