A lock comprising a latch bolt and a dead bolt, a dead bolt lever to move the dead bolt, a key actuated cylinder with a rotary driving bit, a second turn latch bolt lever to move the latch bolt by using the key, a second turn latch bolt driver as an intermediary between the driving bit and the second turn lever, a spring urging the second turn driver in the path of the driving bit, and a locking mechanism to lock the dead bolt. The second turn driver comprises a follower portion which, upon actuation by the driving bit, moves the second turn driver out of the path of the driving bit thereby preventing the driving bit from being blocked. The locking mechanism comprises a slot having two catches and a spring biased lever mounted on the dead bolt lever to lock the dead bolt lever.

A door lock includes an outer enclosure constituted by a body that is substantially shaped like a flattened parallelepiped. The lock has a hole passing through the enclosure, with an axis of extension that is perpendicular to the base of the body, and is suitable for the insertion of a double handle unit. The lock further includes a spring latch exiting from a side wall of the body, through an opening, the spring latch being connected to the edge of the through hole and adapted to be actuated by the handle unit. The lock includes a seat for a cylinder, of the mortise type, the latter provided with an end cam and being accessible from the side of the enclosure that is adapted to correspond to the outside of the door, the cylinder being adapted to release the lock.

A multipoint lock assembly for a swinging door panel includes a mortise housing that is installed in a mortise along the non-hinged edge of the door panel. A latch operating mechanism and a lock operating mechanism are disposed in the mortise housing. Each of these mechanisms is designed to be operated with a standard rotary operator such as a handle or knob for the latch operating mechanism and a key and/or thumb turn for the lock operating mechanism. The latch operating mechanism is transitionable between left- and right-hand orientations and includes a deadlatch feature that prevents forced back-drive. Turning the key and or thumb turn of the lock operating mechanism extends a deadbolt and extends upper and lower shoot bolts from edges of the door. When extended, the shoot bolts also are secured against forced back-drive by unique mechanism configurations.

A latch assembly with a first mounting plate and a second mounting plate. The assembly includes a first latch holder extending from the first mounting plate. A second latch holder is provided that extends from the second mounting plate. The assembly includes a latch arm including a first portion and a second portion. The latch arm is movable between an unlatched position and a latched position and is selectively reversible to be pivotally connected to either the first latch holder or the second latch holder.

A rotary latch assembly is provided wherein the front plate has a C-shaped configuration with opposite top and bottom flanges, and an interconnecting front face. A back plate is connected to the front plate for use in right-handed and left-handed applications. One or more trip levers are mounted on the plates to release the catch and rotor from a latched position. An embossment is provided on the front plate to strengthen the assembly and to support the rotor and the catch. Indicia is provided on the latch assembly to provide for ease of alignment with the striker for proper latching.

A rotary latch assembly is provided which can be configured as right-handed and left-handed using the same rotor and catch components, without reconfiguring the front and back plates. The axles for the rotor and catch are identical so that the rotor and catch can be interchanged on the axles. The latch biasing springs are mirror images so as to be used on either the rotor or the catch. The latch includes multiple connection points for single or dual actuators, and a lifting block to align the assembly with a striker.

A lock comprising a latch bolt and a dead bolt, a dead bolt lever to move the dead bolt, a key actuated cylinder with a rotary driving bit, a second turn latch bolt lever to move the latch bolt by using the key, a second turn latch bolt driver as an intermediary between the driving bit and the second turn lever, a spring urging the second turn driver in the path of the driving bit, and a locking mechanism to lock the dead bolt. The second turn driver comprises a follower portion which, upon actuation by the driving bit, moves the second turn driver out of the path of the driving bit thereby preventing the driving bit from being blocked. The locking mechanism comprises a slot having two catches and a spring biased lever mounted on the dead bolt lever to lock the dead bolt lever.

A latch bolt with a bolt head that is removably mounted on a latch tail through the use of a bolt head adjustment mechanism. The bolt head adjustment mechanism may comprise one or more locking members (e.g., within the bolt head, the latch tail, and/or independent from the other components of the latch bolt) that allow the bolt head to be removed, rotated, and reassembled while the latch bolt is located within the case of the mortise lock. The bolt head may comprise an anti-friction latch that is configured to pivot within the flanges of the bolt head in a way that maintains contact between the anti-friction lock and the strike plate.

A latch includes a housing that has a first side and a second side. The latch includes a bolt assembly that is positioned at least partially within the housing. The bolt assembly includes a bolt movable between an extended position and a retracted position relative to at least one of the first and second sides of the housing. The bolt is biased toward at least one of the extended position and the retracted position, and the bolt is positionable so as to selectively extend from either the first side or the second of the housing in the extended position.

The present invention relates to the field of lockset and provides a lock body a latch bolt installation structure comprising a latch bolt body having a driving part and a latch part, wherein the latch part is detachably connected with the driving part. The latch part is configured with a male part inserting into a female part on the driving part; the female part comprises a first installation position and a second installation position for installing the latch part; when the latch part is installed at the first installation position, a flat surface of the latch part faces towards a first direction; when the latch part is installed at the second installation position, the flat surface of the latch part faces towards a second direction which is opposite to the first direction. The present invention is advantageous in fast reversal of the installation of the latch bolt as well as the construction progress control and user experiences.