Abstract: A vehicle door handle assembly includes a base member, a handle member and a seal member. The base member installs along an interior surface of a vehicle door. The handle member installs along an exterior surface of the vehicle door. The handle member is pivotally connected to the base member for movement between an at rest position and a door opening position. The seal member is attached to the base member with a first surface of the seal member overlaying a portion of the exterior surface of the vehicle door and a second surface opposite the first surface faces a section of the handle member, The first surface has at least one projection extending therefrom engaged with the base member. The second surface has at least one bumper extending therefrom toward the handle member. The at rest position the section of the handle member contacts the at least one bumper.

Abstract: A tamper-proof padlock box which locks a door to a door frame that ensures that only users with a specialized key can access and open an internal lock. The tamper-proof padlock box includes a guard lock box, a padlock, and a key-receiving track mechanism. The padlock includes a U-shaped shank and a locking body. The guard lock box includes a tubular body, a bottom, a removable top, and a staple-receiving hole. The removable top is slidably mounted to the tubular body and supports the padlock. The U-shaped shank is rotatably mounted to the removable top about a leg of the U-shaped shank. The leg is oriented normal to the removable top. The staple-receiving hole allows a padlock staple access to the padlock and normally traverses through a rear sidewall. The key-receiving track mechanism is mechanically integrated into the bottom.

Abstract: The invention relates to an anti-theft device that is both highly resistant to attack by hand-carried bolt cutters and saw blades while also exhibiting a weight suitable for use with bicycles. The device is made with a plurality of interlinked titanium alloy arm members, each of which exhibits a hardness of HRC 30 or more and a cross-sectional distance of 8 mm or more.

Abstract: A motor vehicle door is provided with a supporting door structure and with a door lock as well as with an actuating unit, which, spaced from the door lock, is arranged on the door structure and mechanically coupled to the door lock with at least one connecting link, and with a holding part supporting itself on the door structure, which is designed in order to limit a position change of the actuating unit caused due to external application of force.

Abstract: A locking mechanism involves a movable member and a fixed member. The fixed member has single-locking and double-locking features, as does the movable member. The single-locking features can be engaged and disengaged by movement of the movable member orthogonal to an axis. The double-locking features can be engaged by motion of the movable member along the axis orthogonal while the single-locking features are engaged.

Abstract: A method of protecting a lock on the latch of a shipping container or trailer door without modifying the door latch includes a ring having a bar that is connected at both ends to the inside of the ring. The bar has an aperture dimensioned similarly to the bore on the retainer and handle elements of the door latch. The ring has a rim on one side including a saddle at each end of the bar so that when the rim is placed over the latch the saddles straddle the handle and the bores on the bar, the handle and the retainer are aligned. A shackle of a lock is placed through the bores on the handle, bar and retainer. The ring prevents cutting tools from directly accessing the shackle thereby protecting the lock.

Abstract: A protective device, particularly for a lock of a door or leaf, comprising a covering element which is associated slidingly with a plate that can be fixed to the door or leaf and can be positioned selectively so as to close an opening for access to the lock which is provided in the plate. Two pins are associated transversely with the plate and are adapted to block temporarily the sliding of the covering element with respect to the plate. The device has at least one cam, freely mounted rotatably within a cavity provided in the plate. At least one first recess and at least one second recess are provided in the lateral surface of the at least one cam, which have, in plan view, a mutually different shape and are adapted respectively to allow and prevent the sliding of the covering element.

Abstract: An apparatus and method for enhancing the security of a cluster box unit which includes a protective enclosure, internal cabinetry, door, hinge and locking system. The cluster box unit may also include outgoing mail compartment doors that are heavily constructed and rigidly reinforced, with the locks carried thereon protectively shielded, and with the extensible bolts of these locks being engaged by brackets that not only lock the outgoing mail compartment doors but also the master loading doors of the cluster box units. The cluster box unit may also include master loading doors are provided with hinges that extend the full height of the doors—hinges that are defined by pivotally interfitting elements of extrusions that very sturdily mount the master loading doors, that prevent prying or bending the doors in the vicinities of their hinges.

Abstract: A door having a latch mechanism is provided. The door also includes a bracket, and a pawl having a first aperture. The pawl is rotatably attached to the bracket and is operatively connected to the latch. The door additionally includes a key-cylinder adapted to selectively lock and unlock the latch by rotating the pawl, and a shield having a second aperture. Furthermore, the door includes a component connected to the key-cylinder. The component is aligned with and extends through the first and second apertures without contact with the pawl or with the shield, and is configured to not impede the rotation of the pawl by the key-cylinder when the component is aligned with the first and second apertures. The component is also configured to detach the pawl from the bracket and limit the key-cylinder extraction, when the key-cylinder is forcibly manipulated thereby causing the component to contact the shield.

Abstract: A lock cylinder of a motor vehicle has a cylinder housing formed from plastic and the cylinder housing has an opening for receiving a cylinder core. The plastic of the cylindrical housing is reinforced at least in certain regions with aramid fibers. Thus, the cylinder housing is extremely robust and increases the forcing resistance of a door lock equipped therewith.

Abstract: A cabinet lock for protecting merchandise within a merchandise display cabinet having an inner door and an outer door. The cabinet lock includes a strike plate affixed to the inner door and a lock housing affixed to the outer door such that the cabinet is in a locked configuration that prevents access to the merchandise when the lock housing is operably engaged to the strike plate. A programmable electronic key communicates a security code with the cabinet lock and transfers electrical power to the cabinet lock to operate a lock mechanism between the locked configuration and an unlocked configuration. An indicator is provided for indicating whether the cabinet lock is in the locked configuration or the unlocked configuration. The indicator includes a first segment and a second segment that can be energized to visually indicate the status of the cabinet lock.

Abstract: A door edge protection device for a motor vehicle door, with a door edge protection profile (5) which is guided movably with respect to the door at at least two points lying one behind the other in the longitudinal direction of the door, the door edge protection profile (5) being driven via an eccentric lever (7) mounted rotatably in the door and the door edge protection profile (5) having a holding rod (6) which is guided by a linear guide (10) which is fixed in the door, the holding rod (6) being bent in the region of the linear guide (8, 9; 11).

Abstract: A padlock assembly includes two padlock halves fastened with at least one fastener, and a cylinder lock assembled with the padlock halves. A shackle has legs that are receivable in the padlock halves and lockable with the cylinder lock. The padlock halves are interlocked with the shackle such that even if the at least one fastener is removed, if the shackle is in a locked position with the cylinder lock, the two padlock halves cannot be separated from each other.

Abstract: A bar lock assembly including more than one protective hasp member, and a bar lock that locks together the protective hasp members, wherein the bar lock includes a code-operated locking device mounted in a housing that fits into an internal chamber defined by the protective hasp members, the housing including protrusions that are received in inner grooves of the protective hasp members so as to block movement of the protective hasp members away from each other when the housing of the bar lock is inserted into the internal chamber of the protective hasp members.

Abstract: A protective device comprising a covering element associated slidingly with a plate which can be fixed to the door or leaf and can be positioned selectively so as to close an opening for access to the lock which is provided in the plate. Two pins associated transversely with the plate block temporarily sliding of the covering element. The pins interact with the arms of a rotor, associated rotatably, within a cavity provided in the plate. Pivots protrude from the rotor and cooperate selectively with at least three cams, freely associated rotatably proximate to a surface of the cavity. The cams have an axis at the vertices of a polygon and interact with a magnet-based combination element adapted to modify the angular position of the cams to allow or prevent the rotation of the rotor and temporary mutual release of the pins and the covering element.

Abstract: A locking arrangement for the latching of a door to a counterpart has an upper part and a lower part. The upper part has at least one base section, a first side section which is angled with respect to the base section, a cover section which is angled with respect to the first side section, and a securing section which is angled with respect to the cover section and has a securing opening. The lower part has at least one base section and a securing section which is angled with respect to the base section of the lower part and has a securing opening. A holding means for the holding of a hoop lock is provided at the upper part or at the lower part. The upper part and the lower part can be positioned in a position of use relative to one another such that the securing opening of the upper part and the securing opening of the lower part are arranged in alignment to be able to secure the two securing sections to one another by means of a lock hoop.

Abstract: A cylinder guard for a deadbolt lock having a face portion and an inner portion. The inner portion includes a radial flange and an axial flange created by forming the wall of the guard into a doubled portion. Indentations are formed in the axial flange which enhances the resistance of the guard to an attack upon the deadbolt. The guard also includes a tapered blow-deflecting portion between the inner portion and face portion. A crush zone may be formed between the inner and face portions to attenuate the energy from an attack that is transferred to the axial and radial flanges. A method for making the guard includes stamping a body from steel strip using a multi-station press.

Abstract: The laundry coin anti-theft device protects a laundry coin box from damage by brute force attacks, such as by a sledgehammer, or prying, such as from a crowbar. The laundry coin anti-theft device is a pin that crosses the centerline of the laundry coin box lock, blocking access. The laundry coin anti-theft device protects itself by the use of a sleeve, the sleeve making it difficult to cause damage by twisting because the sleeve prevents gripping.

Abstract: A lock assembly for a container having an opening defined by a door jamb, a cargo door adapted to close the opening, a rod linearly moveable to engage the door jamb, and a latch mountable to the rod. The assembly includes a casing having an inclined opening and mounted to the cargo door parallel the rod. The casing includes a protrusion changeable between an extended and a retracted position. A latch receiving means has an inclined opening adapted to align with the inclined opening of the casing for accepting the latch therein. The latch receiving means is responsive to movement of the latch within the casing between a locked and an unlocked condition and engages the locking means when the latch receiving means is in the locked condition. The rod is moved by the latch to engage and disengage the door jamb.

Abstract: A system for preventing vandalism and unauthorized access to a lock. The system has a male lock member slidably engaged to a female lock member. The lock members are provided in an enclosure and engaged to the sidewalls thereof. A padlock is provided around a charging bar on the member male lock member to prevent the male lock member from sliding relative to the female lock member a sufficient distance to allow the male lock member and female lock member to disengage from the sidewalls of the enclosure. Engaging the male lock member and female lock member to the sidewalls in front of a lock prevents direct access to the lock, thereby reducing vandalism and unauthorized access.

Abstract: A slide bolt lock for locking a pivoting garage door to a garage door frame includes a backing plate has a door mount adapted to fix the backing plate to the door. The backing plate includes a pair of opposed risers, each of which has an aperture therein. The backing plate further includes a lock socket. A rigid slide bolt is slidably and pivotally captured within the apertures of each riser and further includes fixed thereto a lock cover. The slide bolt and the lock cover are slidable between an extended position and a retracted position. The lock cover includes a lock mechanism adapted to selectively and lockingly engage the lock socket of the backing plate when the slide bolt is in the extended position, wherein the lock cover substantially covers the backing plate.

Abstract: A safe or other secure containment having a body, a door for entry into the body, a moveable latch system effective for latching and unlatching the door to the body, a lock attached to the door for locking the safe is made more secure by an active hardplate and an independent lockout means effective for preventing the unlatching of the safe door upon the displacement of the active hardplate caused by an unauthorized and unlawful attempted entry into the safe. Existing safes also can be modified.

Abstract: Apparatus and methods for securing a door having one or more door mechanisms via a cover and base. The cover protects the door mechanisms and includes an enclosure fitting over the at least one of the door mechanisms, a first securing member comprising a slot through which a second securing member passes, and a first joint member. A base connects the cover to the door. The base includes one or more second holes extending through which are one or more fastening mechanisms of the door mechanisms protected by the cover, and a second joint member. A releasable joint aligning the cover with respect to the base, is formed by the first joint member of the cover and the second joint member of the base.

Abstract: A door edge protection device for a motor vehicle door, with a door edge protection profile (5) which is guided movably with respect to the door at least two points lying one behind the other in the longitudinal direction of the door, the door edge protection profile (5) being driven via an eccentric lever (7) mounted rotatably in the door and the door edge protection profile (5) having a holding rod (6) which is guided by a linear guide (10) which is fixed in the door, the holding rod (6) being bent in the region of the linear guide (8, 9; 11).

Abstract: A combination operated padlock has indicia carrying dials that are turned to set a combination for unlocking a shackle of the padlock. Operating components of the padlock are carried by or within a housing-enclosed frame of the padlock. A strong, corrosion resistant insert, preferably formed from brass of uniform thickness, is configured to fit cleverly around and among the movable operating components to strengthen the padlock and to prevent operating component manipulation if an unauthorized unlocking of the padlock is attempted. In a preferred embodiment, the insert has two substantially identical question-mark-shaped tines configured to extend toward and between different adjacent pairs of the dials that are turned to set a combination.

Abstract: There is provided a security cover for a cylinder lock. The security cover may comprise a top wall and a peripheral side wall and may be adapted to be secured over an end of the lock and may include a key slot extending through the top wall and positioned to align with the lock cylinder when the cover is secured over the lock. There is also provided a key for use with the cover and a method for securing a cylinder lock.

Abstract: A security assembly comprising a frame member 12 and a plurality of doors 14 is mountable inside the housing 4 of an ATM or safe etc. Each door 14 can be opened and closed independently of the other doors. Referring to FIGS. 4 and 5, each door 14 is attached to the frame member 12 by a hinge 16. A barrier member 18, which acts to lock the door 14, is mounted to the door 14 by two pivoting brackets 20. When in the locked condition, the barrier members 18 extend substantially along the whole length of the edge of the door to prevent access through the boundaries between the doors and the frame. A barrier member actuator in the form of a plurality of independently moveable locking blades 22 is slidably mounted to the frame 12.

Abstract: The combination of: a) an apparatus with a frame bounding an internal space and a first door that is movable between closed and open positions; b) cooperating components on the first door and at least one of: i) the frame; and ii) a second door that are alignable in a first relative position; and c) a lock assembly that cooperates with the components with the first door in the closed position and the cooperating components in the first relative position and has a locked state wherein the lock assembly prevents the first door from being moved from its closed position into its open position. The lock assembly has a casing with an outer surface and a first assembly that extends over at least a portion of the outer surface of the casing to block access to the casing in a manner that would allow a repositioning force to be applied to the outer surface of the casing so as to thereby defeat the lock assembly.

Abstract: A combination including an apparatus with a frame bounding an internal space and a first repositionable door that is movable between closed and open positions relative to the frame. Cooperating components on the first door and at least one of: a) the frame; and b) a second door are alignable in a first relative position with the first door closed. A lock assembly cooperates with the components with the first door in the closed position and the cooperating components in the first relative position and has a locked state wherein the lock assembly prevents the first door from being moved from its closed position into its open position. A shielding assembly conforms to at least a part of the exposed outer surface, overlies at least a part of the exposed outer surface, and is frictionally held against the lock assembly to be maintained in an operative state.

Abstract: A padlock is provided that may include a lock body and a hoop which is movable between an open position and a closed position with respect to the lock body. The lock body may include an inner housing, an outer housing and a latching mechanism for latching the hoop in the closed position. The inner housing may include a first insertion part and a second insertion part which may receive the latching mechanism to form a pre-installable module. The pre-installable module may be inserted between first and second shells of the outer housing in shape matched manner to place the padlock in a fully assembled condition.

Abstract: A lock includes a stationary key mass having a first key mass bore and a keyway, and a movable spring mass including a first spring mass bore. A first spring mass pin is mounted in the first spring mass bore, and a first key mass pin is mounted in the first key mass bore for reciprocation between a locked position immobilizing the spring mass and an unlocked position unconstraining motion in at least one direction. The unlocked position is a function of the presence of a matching key in the keyway. Multiple key mass and spring mass pins can be used, some or all of which can have stepped configurations, and corresponding single-bladed or multi-bladed keys, or multiple keys, can be used. The keys can be straight or curved in any of various planes, or they can be straight but flexible to match curved keyways. Curves can be unidirectional or compound. Relative motion between the key mass and spring mass can be in a plane or along straight line or circular.

Abstract: A rectangular partial door cover, specifically design to cover the doorknob, surface locks, deadbolt locks, and chain locks of an entrance door to an apartment or house. The base of the rectangular device is attached to the entrance door with a set of screws. The device has four sides, and a sliding door with a knob. The door slides open when the knob is pulled back, and it closes when the knob is pushed forward.

Abstract: A substantially burglary-proof lock, comprises a housing formed with a cylindrical bore defining an inner cylindrical surface, and a cylinder within said bore carrying locking elements movable to locking and unlocking positions with respect to said housing, said cylinder having an outer diameter equal to the diameter of said bore so as to be rotatable when the locking elements are in unlocking position with respect to said housing, said cylinder being formed with a keyway for receiving a proper key in order to move said locking elements to their locking and unlocking positions with respect to said housing, characterized in that said cylinder carries at least one insert of a hard material configured, dimensioned and located such as to prevent pull-out of the cylinder from the housing by a pull-out force applied to the cylinder, and/or by drilling through the locking elements.

Abstract: A locking assembly for securing a first item to a second item includes a staple plate configured for attachment to the first item and having a base plate with a staple projecting from the base plate. A hinge plate is configured for attachment to the second item and a flap is pivotably attached to the hinge plate and includes a channel defined by a pair of opposite sidewalls. The channel has a slot for engaging the staple when the flap is in a closed position.

Abstract: The invention relates to a lock, in particular a hoop lock, having a lock housing, in which a locking cylinder of the lock is arranged, including a cylinder housing, a barrel rotatably mounted in the cylinder housing and a driver unit associated in a drive effective manner with the barrel, and having at least one bolt coupled to the barrel via the driver unit, so that by rotating the barrel the at least one bolt is moveable from a locked position into a release position. The lock housing has a receiving space in an axial extension of the locking cylinder, with the locking cylinder or a part thereof being able to be displaced from an operational position into the receiving space on the application of a predefined force in the axial direction of the locking cylinder, to adopt a sabotage position, in which the coupling of the at least one bolt to the barrel is taken out of operation.

Abstract: A universal security device for preventing unlocking rotation of right and left door stanchions of cargo containers including a protective housing for a puck lock and channel shaped cross bar wings extending from its laterally opposite sides. A hook with claws for engaging a stanchion includes a palm with a locking tab having a locking bar receiving opening. The palm is insertable through one of the complimentary openings provided in each of the two side walls of the housing. At least one interior tab with a locking bar receiving opening is provided in the housing and when the locking rod of a puck lock engages the openings in the locking tabs, the cross bar structure prevents an unlocking rotation of the stanchion.

Abstract: A tamper inhibiting device is provided for adapting to a lock for a door. The lock has a housing configured to attach to the door. The lock also has a locking component being receivable in the housing. The housing has a lip extending from an edge of the housing. The tamper inhibiting device includes a first portion being substantially planar and having a first edge and a second opposing edge between two distal ends. The first portion has an elongate opening between the first and second distal ends. The tamper inhibiting device also includes a second portion being substantially planar and extending substantially perpendicular to the first portion from the first edge of the first portion. The opening is adjacent the first edge of the first portion such that the lip of the housing juxtaposes the second portion when the tamper inhibiting device attaches to the lock.

Abstract: A latch assembly for releasably securing a closure element with a striker element in a closed position. The latch assembly consists of first and second latch elements mounted to a housing for movement relative to each other and the housing, with the first latch element being movable relative to the housing between a latched position and a release position, and cooperating structure on the release lever for moving the second latch element relative to the housing and, in response thereto, causing the first latch element to move from its latched position to its release position. A guard plate is positioned between the housing and the first latch element to more securely retain the striker element and prevent tampering or theft.

Abstract: A lock guard protects a padlock with a shackle and the ends of a securing connector. The device comprises a five-sided housing with an open bottom. Two opposing sides of the housing have opposing openings therethrough for inserting the ends of the securing connector. Inside the housing is a retaining tab having an opening therethrough dimensioned to receive the end of the shackle. The housing can also contain an abutment providing a surface against which to drive the top of the shackle when locking the padlock within the lock guard. When the retainer tab is vertical, the top edge of the hole in the retainer tab can act as an abutment.

Abstract: An anti-theft shield that protects the latching apparatus on the large rear doors of cargo trucks and truck trailers is provided, the shield including an elongated sheath-like member for sliding over and enclosing the cargo door latch handle, and a connected panel member for extending over and protecting the cargo door latch mechanism and the associated padlock for locking the latch handle to the latch mechanism. At a first end of the sheath-like member on the rear side thereof is a planar guide member for insertion behind the latch handle and pivot pin locking hook. The shield is secured in position over the latch mechanism by means of the guide member in combination with a shield locking bracket having an opening for accepting the padlock bight during the locking procedure.

Abstract: A lock includes a body, a key-operated core in the body, two spring-biased plates slideable on a recessed portion of the body, and a locking crutch to be fastened to the body with the spring-biased plates. The body has crutch embedding holes on two sides of the core; the core has a plate part, and force is applied to the spring-biased plates through the plate part when the core is turned. The locking crutch has a groove on each of two ends to engage a corresponding plate. The plates are biased to engage the locking crutch when the core is in the locking position; and, the plates are forced to disengage from the locking crutch by turning the lock core to the unlocking position. Saw-resistant pins are inserted in receiving holes formed on a periphery of the lock body to protect the lock against a saw.

Abstract: An improved lock mechanism comprising an anti-pry shield having a hollow body with a first end and a second end, and a cylindrical shield at its first end; a knob-set cylinder having a plug with a key end and a driver end; a monolithic cylinder guard having a body with a beveled exterior side wall between a first end and a second end, the second end having a bore, a cylinder receiver having a cavity open to the first end, the cavity adapted to receive the knob-set cylinder from the first end, the cavity open to the bore in the second end, the bore adapted to receive the key end of the plug; and a cover having a beveled exterior side wall between an open first end and a covered second end, the decorative cover permanently secured to and covering the beveled exterior side wall and the second end of the monolithic cylinder guard, the covered second end of the cover having a bore coaxial with the bore in the second end of the monolithic cylinder guard and the plug of the knob-set cylinder.

Abstract: A tubular radial pin tumbler lock is described. The radial pin tumbler lock has an outer shell, an inner shell housed in the outer shell, and a spindle housed in the inner shell. The spindle has a spindle head with an uneven number of irregular sides. A plurality of radial locking pins are arranged radially from the spindle. A crown on the spindle encases the locking pins. An anti-drill feature is included on the spindle head. An annular space between the inner shell and the spindle head allows access to the radial locking pins for operating the radial pin tumbler lock.

Abstract: The preferred embodiments of the present invention provide an improved access control system that provides additional security for the connection between an existing locking system and an access control system, for example, to prevent tampering. The security system preferably includes a control line shield to protect a control line running from an access reader to an external lock incorporated in a door, for example. The control line shield seals the control line into the interior of the door to prevent easy access for interference and tampering Additionally, the control line shield may be removed as necessary to provide service to the access system.

Abstract: A break-in resistant cylinder for locks, comprising a stator provided with a substantially cylindrical longitudinal cavity for accommodating a rotor with a longitudinal recess for the insertion of a key. The rotor and the stator comprise a plurality of channels which are substantially aligned and face each other (when the cylinder is in the closed configuration); the channels accommodate respective coding pins, tumbler pins and any elastic elements designed to prevent the rotation of the rotor within the stator if the key is not present in the longitudinal recess. At least one of the tumbler pins comprises a bush and a spike; the stem of the spike has a smaller diameter than the inside diameter of the bush and is longer than the bush. The spike is arranged so that its head is directed toward the bottom of the channel of the stator and rests against the elastic elements and the free end of the stem rests against the lower surface of the coding pin.

Abstract: A guard structure for a vehicle seat lock includes a cable 54 operatively connecting between a seat locking mechanism (49) for a vehicle seat and a key device (51) adapted to be actuated by a key. The guard structure also includes a guard body (81) for blocking an access from outside of a vehicle body to the cable (54).

Abstract: A drill resistant lock cylinder is useful for resisting attempts to defeat the cylinder using locks or picks. The cylinder includes a cylinder housing (105) having a central axis. Two pinion cylinders (115, 125) are positioned inside the cylinder housing (105) along the central axis. A combination pin cylinder (120) is positioned along the central axis between the two pinion cylinders (115, 125), and the combination pin cylinder (120) and each pinion cylinder (115, 125) includes axial pinholes (220) there through. Pins (130) located inside the axial pinholes (220) in the combination pin cylinder (120) and the pinion cylinders (115, 125) establish two shear lines along axial ends of the pinion cylinders (115, 125).

Abstract: A locking mechanism for a theft resistant mailbox includes a door assembly. A door is affixed to a frame by at least one pivot point. A cam includes a lever rotatably engaged to a fixed surface at a mounting point and defines a cutout oriented to be removably engaged to a striker attached to a separate surface abutting the fixed surface to form a lock for the door upon urging of the cam along an angle of rotation defined about the mounting point. An anti-pry plate is attached to the fixed surface and juxtapositioned about the cam throughout the angle of rotation by which the lock is effected. The fixed surface includes one of the frame and the door. The separate surface includes an other one of the frame and the door. The fixed surface and the separate surface are provided independent of the at least one pivot point.

Abstract: A latch has a bushing which has at least one bushing projection or means for preventing insertion of an unauthorized tool to rotate a latch actuator of the latch. Only a key having an outer key recess which can mate with bushing projection on the bushing permits insertion of the key. The cap subassembly of the latch is provided with projections which are of a size and so positioned as to correspond with the internal recesses of the key so as to allow the cap subassembly to enter into the bore of the key and permit a mating engagement of internal recesses on the key and projections on the cap subassembly. Because cap portion rotates freely on top of the cap subassembly which is the part of the cap driven by the key, the arrangement makes it impossible, or at least very difficult, to rotate the shaft and in turn the pawl by means of a tool which rotates the cap portion.

Abstract: A door lock includes a support seat having a recess for mounting a driven member, a control knob including a drive member rotatably mounted in the support seat to rotate the driven member and a rotation member to rotate the drive member and having an outer wall formed with an annular groove and a locking groove, and a locking pin mounted in the support seat and having a locking end selectively extended into the annular groove or the locking groove of the rotation member of the control knob. Thus, the door lock has a dead locking function to lock the door from inside to prevent the door from being unlocked from outside by a key or other tool so as to protect the user's safety inside of the door.