Abstract: A removable plug is disclosed for concealing a bore in a piece of furniture, the plug includes a body configured to fit within the bore. A retaining portion of the body is configured to be of adjustable diameter such that a user can cause an increase in the diameter of the portion to create an interference fit between an outer wall of the body and an inner wall of the bore, thereby retaining the plug removably within the bore. Systems and methods that utilize the removable plug are also disclosed.

Abstract: The disclosure relates to an improved cylinder lock, key and their combination. More specifically, the disclosure relates to a locking pin assembly operable to provide added combination and increase security against burglary, such as by key bumping, a cylinder lock incorporating the locking pin assembly and key blade and key blade assemblies having the configuration to actuate the locking pin assembly.

Abstract: The present disclosure provides for a lock cylinder having a rotatable spindle with at least one disc and at least one wafer housing rotatingly engaged therewith. A slidable wafer is carried on the wafer housing. A locking bar is operable to prevent rotation of the lock cylinder in a locked position and permit rotation of the lock cylinder in an unlocked position.

Abstract: A lock and key combination providing extra code combinations. The lock has a housing and a cylindrical key plug with a keyway and at least side locking tumbler. The side locking tumbler has, at its rear side, a tongue which will fit into an associated recess in a side bar. The outer surface of the tongue is shaped as a groove between two vertical edge portions. One of these edge portions will make contact with the sidebar, adjacent to an entrance opening of the recess in the sidebar and thereby stop the tongue from entering into the rectangular recess if the side locking tumbler is rotationally misaligned. Because of this, it is possible to design the cylinder lock with a large number of predetermined code positions for each side locking tumbler. An associated key with a key blade having a wave-like side code pattern, will have, for each side locking tumbler, a selected one of a large number of predetermined different code positions.

Abstract: The invention relates to a key (1) for locking a lock, comprising at least one first surface (2) and at least one second surface (2?), with at least one sensing position (4) provided along the longitudinal extent of the key (1), at which sensing position on the first surface (2) at least one first code (3) is provided for reading in the lock and/or at least one second code (3?) is provided on the second surface (2?) for reading in the lock, wherein at least one code (3) of the first surface (2) differs at least at one sensing position (4) from the second code (3?) at the same sensing position (4). The invention furthermore relates to a lock for a key of this type, and a system made up of at least two locks or lock groups and at least one key according to the invention.

Abstract: Cylindrical locks and more specifically a set of profile members in combination with a rotatable cylindrical key plug have a longitudinal keyway with a profile corresponding to an associated key. Each profile member is accommodated in an associated cavity in the key plug at a lateral side of the keyway so as to form a lateral part thereof. The profile members have a non-circular cross-section and are non-rotatably mounted in the associated cavities at a location adjacent to the keyway. A portion of each profile member has a profiled surface portion facing inwards toward the opposite lateral side of the keyway, the profiled surface portion having, in a plane being transversal to a longitudinal axis of the key plug, a specific profile section defining a local, lateral part of the keyway. An associated key, and a method to manufacture a cylindrical key plug with such profile members are also disclosed.

Abstract: A cylinder lock and an associated key, the lock comprising a fixed body and a plug, which is accommodated within a respective cavity of the body and can rotate with respect to the body. The plug comprises a substantially longitudinal compartment for the functional accommodation of a key which comprises a grip portion from which an elongated body extends which is provided with coding grooves and protrusions on its outer surface; between the plug and the body there are respective accommodation channels for translating coding elements, which open onto the substantially longitudinal compartment; the plug comprises at least one auxiliary duct, which faces the substantially longitudinal compartment and extends at least partially in the body, for the sliding accommodation of at least one coding unit that is constituted by at least one pin and at least one conical portion.

Abstract: A key (1) for a rotary cylinder lock (2) comprises a key grip (3) and a key shank (4), which adjoins the key grip (3) and extends along a longitudinal axis (L), wherein the key shank (4) has, on its outside (5), control recesses (10), in particular control bores, for properly positioning tumblers on the rotary cylinder lock (2) and also has at least one control element (6) arranged in a movable manner in the key shank (4), which control element (6) has a control surface (8), which interacts with a tumbler (7) of the rotary cylinder lock (2). Furthermore, the key is characterized in that the key shank (4), in the region of the control element (6), has a tapered cross section (9), which is tapered in relation to the cross section (11) with the control recesses (10).

Abstract: A bridge tumbler lock has tumblers that both slide and pivot, with their motion controlled by pairs of key interfaces. A sidebar is released to permit lock opening movement when all tumblers are in their correct positions. This results in a lock that is resistant to release of information due to partially correct key combinations occurring in the course of a lock picking attempt and thus enables enhanced security in an economical, effective lock construction.

Abstract: A key device (10) includes a generally elongate shaft portion (12) including a key combination surface (16) that has a plurality of key cut stations (18) for forming telescoping key cuts at each key cut station (18). Each key cut station (18) has a telescoping maximum adjacent cut specification (MACS) that defines a maximum depth of adjacent. The key device (10) also has a non-MACS key cut (20), formed at one or more of the key cut stations (18), for interfacing with a first pin (24) of a given telescoping plug pin. The non-MACS key cut (20) is dimensioned to leave material in the elongate shaft portion (12) for forming another key cut (20A) for interfacing with a second pin (26) of the given telescoping plug pin.

Abstract: A locking system is provided whereby at least two locking devices can be actuated with one and the same key. The key has at least two control tracks, via which, in at least two scanning planes lying one behind the other respectively transverse to the insertion direction, the scanning of scanning points provided on the key is possible. Via the scanning points provided in at least one scanning plane, both types of platelet tumblers can be scanned via the mating scanning points thereof and separated, so that the arrangement of one type of the two platelet tumblers in at least one scanning plane can be chosen freely in order to form a multiplicity of locking devices having cylinders cores having an associated cylinder housing and matched to the free choice of the platelet tumblers, which can be actuated with one and the same key.

Abstract: A system includes a multisided key with three or more sides, where all the sides of the multisided key are identical. Further, the system includes a cylindrical lock with inner and outer cylinders and a locking vane residing radially outward in a void spanning the inner and outer cylinders. The locking vane includes an inner portion including a first protrusion and a second protrusion corresponding to two levels of the multisided key and an outer portion separated from the inner portion by a gap, wherein at least a part of the outer portion is disposed in the outer void. When the multisided key is inserted into the lock, the gap of the locking vane aligns with an interface between the inner and outer cylinders, allowing the inner cylinder to rotate within the outer cylinder.

Abstract: A lock and key combination includes a cylinder rotatably disposed within a shell and a sidebar within the cylinder and movable between a locked position preventing rotation of the cylinder and an unlocked position allowing rotation of the cylinder. A slider is mounted within the cylinder for movement between a first position blocking movement of sidebar from the locked position and a second position not blocking movement of said sidebar. A key has a blade configured to be inserted into a keyway of the cylinder and includes a slider-actuating element mounted within the blade for movement with respect to the blade. As the blade is inserted into the keyway, a cam element within the keyway moves the slider-actuating element to a position engaging the slider so that further movement of the key moves the slider from the first position to the second position.

Abstract: A lock cylinder includes a housing and first and second key plugs rotatably received in the housing about an axis. The first and second key plugs are axially spaced in the housing and each includes a keyway for insertion of a corresponding key. The keyways of the first and second key plugs are aligned with each other along the axis. The lock cylinder further includes a blocking core fixedly mounted in the housing and between the first and second key plugs along the axis. The blocking core includes a through-hole aligned with the keyways of the first and second key plugs along the axis. The lock cylinder can effectively prevent an illegal picking tool from inserting into the keyways of the first and second key plugs and from turning the key plugs, thereby providing an enhanced anti-theft effect.

Abstract: The present disclosure provides for a lock cylinder having a rotatable spindle with at least one disc and at least one wafer housing rotatingly engaged therewith. A slidable wafer is carried on the wafer housing. A locking bar is operable to prevent rotation of the lock cylinder in a locked position and permit rotation of the lock cylinder in an unlocked position.

Abstract: An exemplary lock assembly includes a plurality of discs, one or more wafer housings housing one or more wafers, a spindle, a locking bar, and a lock assembly housing. Each wafer housing is provided with one or more wafers that are spring biased in a first direction. The discs, wafer housing, and wafers may include recesses. When no key is inserted, the lock assembly is locked by both the wafers and the locking bar. When a proper key is utilized, the locking bar is free to move into the recesses to release the spindle.

Abstract: A lock assembly (10) including a plug (12) having a keyway (14) for inserting therein a key (16), and a movable element (18) movingly disposed in the plug (12), the movable element (18) being divided into at least two separate magnetic portions (20, 22) arranged to move relative to one another and having identical magnetic polarity, wherein the magnetic portions (20, 22) are sufficiently near one another such that one of the magnetic portions (20, 22) applies a magnetic repelling force on the other magnetic portion (20, 22).

Abstract: In a cylinder lock, a half tumbler biased to engage an engagement portion with a locking recess of a cylinder body is inserted into a tumbler insertion hole of a rotor so that the engagement portion is retraced from the locking recess in response to insertion of a legitimate mechanical key into a key insertion hole. An inner side surface of the tumbler insertion hole is formed to include: a guide portion facing a half tumbler and extending in a moving direction of the half tumbler; and a passage forming portion having larger clearance with the half tumbler than that of the guide portion to form a release passage between the passage forming portion and the half tumbler such that the release passage faces the key insertion hole, extends in the moving direction of the half tumbler, and has opposite ends opened to an outer surface of the rotor.

Abstract: The invention relates to a locking device of a motor vehicle, having a key (10) and a lock cylinder, wherein the lock cylinder comprises a cylinder core rotatably supported in a cylinder housing of the lock cylinder, a channel comprising the cylinder core and into which the key (10) can be inserted, spring-loaded tumbler elements displaceably supported radial to the cylinder axis of the lock cylinder when inserting the key (10) into the channel radial to the cylinder axis of the lock cylinder, the plurality of outer surfaces (11a, 11b, 12a, 12b) on the key (10) comprising at least two encoding strips (51a, 51b) acting on the tumbler elements when the key (10) is inserted.

Abstract: A locking system is set forth having a key and a lock cylinder. The lock cylinder has a cylinder core journalled in a housing and having a keyway for inserting the key. A plurality of tumblers actuable by the key and an additional blocking element movably arranged in a guide passage of the cylinder core project into the keyway, said additional blocking element being displaceable obliquely or transversely to the direction of insertion of the key. The additional blocking element is made for cooperation with a counter-element arranged at the key blade with a key introduced up to the maximum insertion depth. The counter-element is in this respect arranged in a groove or recess starting from the key tip and extending in the longitudinal direction of the key blade.

Abstract: A lock (100) is described, comprising: a body (1) suitable for defining a housing (2) having a main development direction (D) along a direction of insertion (I) of the key; a first rotor (30) suitable for being rotationally housed inside said housing (2) of such a body (1) around the main development direction (D) of such a body (1), said first rotor (30) being suitable for defining a further housing to receive a second rotor (40) that can rotate inside said first rotor (30) around the main development direction (D) of such a body (1). The lock (100) is characterized in that said second rotor (40) can be rotated by the key between a position of disengagement and a position of engagement with said first rotor (30), in said position of engagement said first rotor (30) and said second rotor (40) being suitable for translating as a unit along the main development direction (D) of the body (1) to reach a position in which the lock (100) is actuated.

Abstract: A lock cylinder includes a cylinder housing with a upper pin hole set and a replacing opening, a cylinder body with a lower pin hole set, a upper locking pin set, a second locking pin set and a clip member. The cylinder body is movably disposed inside the cylinder housing. The upper locking pin set is disposed inside the upper pin hole set for engaging the cylinder housing and the cylinder body. The second locking pin set is disposed inside the lower pin hole set for disengaging the cylinder housing from the cylinder body. The clip member constrains the cylinder body from sliding on the cylinder housing in a first position, and does not constrains the cylinder body from sliding on the cylinder housing in a second position. The cylinder body slides to a replacing position for replacing the second locking pin set via the replacing opening.

Abstract: A locking device comprises a key (10) and a locking cylinder (30). The locking cylinder (30) in turn is composed of a stationary cylinder housing (31) and a cylinder core (32) rotatably supported therein. In order to increase the break-in safety, it is proposed to use two types of plate closures (40, 50) in the cylinder core (32), the displacement of that closure pointing into two radial directions (41, 51) that differ from each other. The key (10) comprises planar outer surfaces (12, 13) disposed at an angle to each other, the two types of plate closures (40, 50) being parallel displaceable to said surfaces. Each of the two adjoining outer surfaces (12, 13) has a dedicated linear control path (21, 22), which varies in adjoining key sections transversely to the key longitudinal direction (29) for coding the key (10).

Abstract: A dual key bi-step lock having a shell and a cylindrical plug in the shell. The plug has a primary keyway and a secondary keyway and at least one set of primary pin stack and at least one set of secondary pin stack between the shell and the plug, respectively coupling with the primary and the secondary keys. a longitudinal stage is formed on a cylindrical surface of the plug. An involute side face extending from the stage to the cylindrical surface of the plug. The primary key is able to dive the plug to a position of first step open at which the stage is stopped by the key pin of the secondary pin stack. The secondary pin stack is unlocked by the secondary key and the plug is able to be further driven to a position of second step open by the primary and the secondary keys from the first step open.

Abstract: A plug assembly for use in a key-operated lock, having a cylindrical key plug that can rotatable between a key insertion position and a control position, the key plug having a keyway and tumbler bores, an axial groove into the periphery displaced tangentially from the tumbler bores, a curved trough extending radially inwardly from the carriage groove, a control tooling slot formed radially inwardly from the curved trough. A carriage is moveable axially within the carriage groove, and has an outer surface proximate with the cylindrical periphery of the key plug. The carriage has radially-formed retainer bores that align tangentially with the tumbler bores when the carriage is in a position to accept lock configuration change balls. A separate change tooling blade can be inserted into the control tooling slot to raise any change balls within the retainer bores out through an outer opening the retainer bore.

Abstract: The invention relates to a locking device, in particular for a motor vehicle, having a key (10) and a lock cylinder (30), having a cylinder core (32), which is mounted in a rotatable manner in a cylinder housing (31) and has a key channel (33) into which the key (10) can be introduced, having spring-loaded tumbler elements (41, 42), which are mounted such that, when the key (10) is inserted into the key channel (33), they can be displaced radially in relation to the axis (34) of the lock cylinder (30), and having a plurality of outer surfaces (13, 14, 15), which are provided on the key (10), have control tracks (11, 12) and act on the tumbler elements (41, 42) when the key (10) is introduced.

Abstract: A lock structure includes a lock cylinder, a plug and a pin assembly, the plug is within an accommodating space of the lock cylinder. The plug comprises an outer lateral wall, a plurality of first lower pin holes and at least one second lower pin hole, each of the first lower pin holes comprises a first blocking edge, the second lower pin hole comprises a second blocking edge, wherein a second depth defined between the second blocking edge and the outer lateral wall is smaller than a first depth defined between the first blocking edge and the outer lateral wall. By height difference between the position of the first blocking edge and the position of the second blocking edge, an unmatched key can not contact with the second lower pin under instantaneous bump to prevent an unlock situation. Therefore, the burglar proof function is achieved.

Abstract: The present invention concerns a pin tumbler lock system having a housing, a plug, and easy accessible driver pins, key pins and springs. The system is configured so that the lengths of the key pins are adjustable from the outside without taking the lock apart.

Abstract: A locking mechanism is provided for a lock body and a rotatable key plug. The locking mechanism comprises pins having recesses, each of the pins adapted to be disposed in pin bores in the key plug for reciprocal and rotational movement. An elongated spring member simultaneously engages and biases the pins toward a keyway in the key plug. A locking bar moves between a first position and a second position where at least a portion of the locking bar is received in the recesses in the pins. The locking bar is prevented from moving to the second position unless the pins are in a position where the recesses are aligned with the locking bar. Upon insertion of a key in the keyway the pins are moved axially or rotated for aligning the recesses in the pins with the locking bar so the key can rotate the key plug.

Abstract: An illustrative key includes first and second substantially vertical blades being connected by a substantially horizontal connecting member such that an axial channel is formed between the two blades. Members may be slidingly coupled to the connecting member such that the members are moveable into the channel.

Abstract: A locking mechanism is provided for a lock body and a rotatable key plug. The locking mechanism comprises pins having recesses, each of the pins adapted to be disposed in pin bores in the key plug for reciprocal and rotational movement. An elongated spring member simultaneously engages and biases the pins toward a keyway in the key plug. A locking bar moves between a first position and a second position where at least a portion of the locking bar is received in the recesses in the pins. The locking bar is prevented from moving to the second position unless the pins are in a position where the recesses are aligned with the locking bar. Upon insertion of a key in the keyway the pins are moved axially or rotated for aligning the recesses in the pins with the locking bar so the key can rotate the key plug.

Abstract: A locking device which has a lock cylinder and a matching key. The key has a key bit with at least one coding notch and a blocking rib with at least one indentation. The lock cylinder has a housing with a bearing bore and a cylinder core that is mounted in the bearing bore and a blocking member. The blocking member is engagable in a blocking recess of the bearing bore and prevents rotation of the cylinder core. A pivot lever is mounted in the cylinder core and has a bearing end about which the pivot lever pivots, and a sensing end which senses the blocking rib The pivot lever closes off a capturing opening for the housing pin when the blocking rib is the proper height and opens the capturing opening after a partial rotation of the cylinder core when the blocking rib is missing.

Abstract: A combination includes a disc tumbler cylinder lock and key. The disc tumbler cylinder lock of the combination comprises a rotation limiter of the key, and the key comprises guidance surfaces for the rotation limiter. The rotation limiter comprises a frame, which comprises a key profile opening, and a casing, which at least partially surrounds the frame. The frame comprises a limiting mechanism and a locking mechanism, which are disposed in a line such that the limiting mechanism is on the other side of the key profile opening and the locking mechanism is on the opposite side of the key profile opening.

Abstract: The invention relates to a locking device of a motor vehicle, having a key (10) and a lock cylinder, wherein the lock cylinder comprises a cylinder core rotatably supported in a cylinder housing of the lock cylinder, a channel comprising the cylinder core and into which the key (10) can be inserted, spring-loaded tumbler elements displaceably supported radial to the cylinder axis of the lock cylinder when inserting the key (10) into the channel radial to the cylinder axis of the lock cylinder, the plurality of outer surfaces (11a, 11b, 12a, 12b) on the key (10) comprising at least two encoding strips (51a, 51b) acting on the tumbler elements when the key (10) is inserted.

Abstract: The invention relates to a locking device, in particular for a motor vehicle, having a key (10) and a lock cylinder (30), having a cylinder core (32), which is mounted in a rotatable manner in a cylinder housing (31) and has a key channel (33) into which the key (10) can be introduced, having spring-loaded tumbler elements (41, 42), which are mounted such that, when the key (10) is inserted into the key channel (33), they can be displaced radially in relation to the axis (34) of the lock cylinder (30), and having a plurality of outer surfaces (13, 14, 15), which are provided on the key (10), have control tracks (11, 12) and act on the tumbler elements (41, 42) when the key (10) is introduced.

Abstract: A locking system is provided whereby at least two locking devices can be actuated with one and the same key. The key has at least two control tracks, via which, in at least two scanning planes lying one behind the other respectively transverse to the insertion direction, the scanning of scanning points provided on the key is possible. Via the scanning points provided in at least one scanning plane, both types of platelet tumblers can be scanned via the mating scanning points thereof and separated, so that the arrangement of one type of the two platelet tumblers in at least one scanning plane can be chosen freely in order to form a multiplicity of locking devices having cylinders cores having an associated cylinder housing and matched to the free choice of the platelet tumblers, which can be actuated with one and the same key.

Abstract: A profiled key for use in an associated cylinder lock provided with a rotatable key plug having a longitudinal keyway. The key has a substantially flat key blade with a longitudinally extending profile groove at a side surface thereof and at least one local recess adjacent to the profile groove. The local recess constitutes a locally expanded portion of the profile groove, and the locally expanded portion of the profile groove has a cross-section with two opposite, non-symmetrical side walls. The local recess will accommodate a blocking element in the lock, and permit full insertion of the key blade into the keyway.

Abstract: A master key lock includes a lock cylinder having a keyway for receiving a key, a sleeve about the cylinder, a plurality of wafer tumblers, a master key and a spring operable to axially move the sleeve relative to the cylinder when the master key is inserted into the keyway. A system that uses the master key lock includes a lock case wherein the sleeve is disposed between the cylinder and the lock case, the sleeve being axially movable within the case. The sleeve comprises a plurality of transversely disposed slots for engaging the plurality of wafer tumblers such that the lock is unlocked by insertion of a key or a master key. A method of using the master key lock is also disclosed.

Abstract: A cylinder lock and key combination is disclosed. The lock comprises a housing (30) having a cylindrical bore and a cylindrical key plug (33) being rotatably journalled in said cylindrical bore. The key plug has a longitudinal, profiled keyway (34) and means (1, 2) for locking the key plug against rotation in the cylindrical bore unless a correctly cut key is fully inserted into the keyway. The key blade (60) has a cross-sectional profile fitting into said keyway, and a profile groove (61) extending longitudinally along the key blade. The lock comprises a blocking mechanism with at least one blocking element (20), which is movable from a first blocking position, in which first projecting portion (21) of the cross-sectional profile of the blocking element extends outside the cross-sectional contour of said profile rib, into a second blocking position, in which a second projecting portion (22) extends outside the contour of the rib and is accommodated in a recess (70) in the key blade.

Abstract: A thin lock has a housing, a core assembly mounted in the housing, multiple pin assemblies arranged longitudinally in the core assembly, and a latch assembly mounted through the housing and selectively activates the core assembly and the pin assemblies. Thus, when the thin lock is mounted on a door panel, numbers of the pin assemblies does not relate to a thickness of the door panel. Therefore, the numbers of the pin assemblies are able to be added to increase the complexity and enhance the safety of the thin lock according to user's need.

Abstract: A key includes a body that is plate-shaped to be inserted into a locking device, and a groove that is formed in the body and engages with a plurality of tumblers of the locking device to allow locking and unlocking operations. The groove includes, at a location corresponding to one tumbler of the locking device, a non-engagement part that does not engage with the one tumbler. The groove may include an inside groove, and the non-engagement part may include a notch portion that the inside groove is cut to reach an edge portion of the body.

Abstract: A pin tumbler cylinder lock includes a shell, a plug, and at least first and second tumbler pins and first and second driver pins. At least the first driver pin extends into a corresponding plug channel when the plug is in a locked condition, such that rotation of the plug with respect to the shell is blocked. The lock is configured such that at least the first driver pin is separated from the first tumbler pin by a gap when the plug is in the locked condition. When the first and second tumbler pins are raised without the proper key and the gap between the first tumbler pin and the first driver pin is eliminated, the second tumbler pin extends across the shear line and into the corresponding shell channel.

Abstract: A lock cylinder is provided and includes an outer cylinder having a bore, an inner cylinder rotatably disposed within the bore, and a pin assembly disposed within the inner and outer cylinders. The pin assembly is operable to selectively lock the inner cylinder relative to the outer cylinder. The pin assembly includes an upper shear cylinder positionable relative to the outer cylinder and a lower shear cylinder positionable relative to the inner cylinder. The upper and lower shear cylinders are movable to define a first shear line therebetween. In addition, the pin assembly includes an upper pin slidable within the upper shear cylinder and a lower pin slidable within the lower shear cylinder, whereby the upper and lower pins define a second shear line therebetween. The lock cylinder is positionable from a locked position to an unlocked position when the first shear line is aligned with the second shear line.

Abstract: A removable core lock and key device comprises a cylinder housing (10) and a cylinder core (20), which is accommodated in a circular opening in the cylinder housing. A plurality of pin tumblers (22) are movable under influence from code surfaces of a key, wherein at least part of the pin tumblers are provided in a recess (20b) in the mantle surface of the cylinder core. A cam adapter (40) is rotatably provided in the opening in the cylinder housing. The cam adapter comprises an engagement portion (40c) which engages the recess (20b) in the mantle surface of the cylinder core when the cylinder core is in an operative position, wherein at least one of the pin tumblers is movable between a blocking position, in which the engagement portion of the cam adapter cooperates with the at least one pin tumbler to prevent mutual axial movement of the cam adapter and the cylinder core, and a release position, in which mutual axial movement between the cam adapter and the cylinder core is allowed.

Abstract: A pin tumbler lock having a housing with a series of holes running parallel to the longitudinal axis of the cylindrical bore in the housing. The holes are bored through the housing, and a first end of each hole opens to one of each of the chambers in the housing, between the first and second ends of the corresponding chamber, and a second end of each hole opens to the outside of said housing. A tool having a body comprising a tumbler-lock-housing receiving cavity, for receiving the housing therein, wherein the body comprises a first and second series of channels for creating the holes in a conventional pin tumbler lock housing.

Abstract: A profiled key for use in an associated cylinder lock provided with a rotatable key plug having a longitudinal keyway. The key has a substantially flat key blade with a longitudinally extending profile groove at a side surface thereof and at least one local recess adjacent to said profile groove. The local recess constitutes a locally expanded portion of said profile groove, and the locally expanded portion of the profile groove has a cross-section with two opposite, non-symmetrical side walls. The local reces will accommodate a blocking element in the lock, and permit full insertion of the key blade into the keyway.

Abstract: The present invention relates to a pin tumbler cylinder lock having a cylinder casing and a plug selectively rotatable in the casing, and a plurality of driver pins and associated tumbler pins rotatable about their longitudinal axes. The cylinder lock includes a plurality of parallel circumferential tracks formed in the cylinder casing. Each of the tumbler pins is adapted and configured to seat in the plug and includes a track engaging element arranged to selectively engage one of said tracks. The tumbler pins are arranged to align both vertically and horizontally with matching depressions in a symmetrical key, in order to permit the turning of the plug in the cylinder casing when the key is turned.

Abstract: A pin tumbler lock having a housing with a series of holes running parallel to the longitudinal axis of the cylindrical bore in the housing. The holes are bored through the housing, and a first end of each hole opens to one of each of the chambers in the housing, between the first and second ends of the corresponding chamber, and a second end of each hole opens to the outside of said housing. A tool having a body comprising a tumbler-lock-housing receiving cavity, for receiving the housing therein, wherein the body comprises a first and second series of channels for creating the holes in a conventional pin tumbler lock housing.

Abstract: An anti-theft lock includes a cylinder having multiple upper pin holes and a core is rotatably received in the cylindrical recess and has multiple lower pin holes which communicate with the upper pin holes. Each lower pin hole includes a shoulder located close to the wall of the core. A lower pin, an upper pin, a spring and a cap are installed into the aligned lower pin hole and upper pin hole in sequence. A special lower pin, a special upper pin, one of the springs and one of the caps are received in one of the aligned upper pin hole and lower pin hole. The special upper pin includes ridges rested on the shoulder of the lower pin hole and a gap is defined between the special upper pin and the special lower pin.

Abstract: A method of manufacturing a lock assembly for enabling use of a key-in-knob lock cylinder assembly in different types of lock assemblies. The method includes providing a key-in-knob lock assembly having a key-in-knob housing and a plug rotatably engaged within the key-in-knob housing, providing an interchangeable core lock assembly having an interchangeable core housing, and inserting the key-in-knob housing into the interchangeable core housing such that the key-in-knob housing is universally exchangeable between the key-in-knob lock assembly and the interchangeable core lock assembly.