Abstract: A locking system has a lock cylinder rotatable within a lock housing and a side bar movable relative to channels within the lock cylinder and lock housing between locked and released conditions of the lock cylinder. An idler block within the lock cylinder has a key channel receiving a key therein so that the key and idler block rotate together relative to the lock cylinder. Annular detainer discs are received between the idler block and the lock cylinder, each having an outer gate channel and an inner key bit such that keyed surfaces of the key engage the key bits when rotated to align the gate channels with the side bar and enable the release of the side bar to unlock the cylinder relative to the housing. A stationary shield may be fixed relative to the housing, about which the idler block rotates to restrict access to the detainer discs.

Abstract: An anti-vandal padlock has a base, a buckling unit, two anti-sawing sleeves, a ball, and a locking mechanism. The base has a mounting passage and an annular groove formed on an inner surface of the mounting passage. The buckling unit has two straight segments. The second anti-sawing sleeve is rotatably and axially-movably mounted in the mounting passage, and has a ball hole. The ball is mounted in the second anti-sawing sleeve and is capable of protruding out of the ball hole. In the locked state, the locking mechanism makes the ball engage in the annular groove to limit movement of the second anti-sawing sleeve, such that the buckling unit cannot be detached from the second anti-sawing sleeve. The two anti-sawing sleeves are rotatably mounted on the two straight segments such that the buckling unit cannot be sawn off and has a better anti-theft ability.

Abstract: A cylinder lock comprises a lock cylinder; a holder for receiving the lock cylinder; and a securing element, wherein the lock cylinder comprises a cylinder housing and a cylinder core that is rotatable about a cylinder axis in the cylinder housing and that has a keyway, wherein the securing element is axially fixedly held at the lock cylinder and has a blocking section, which contacts an abutment section of the holder in a blocking position, and a coupling section. The coupling section is accessible for a coupling actuation through the keyway and is rotationally fixedly couplable to the cylinder core by the coupling actuation. The blocking section is hereby then displaceable from the blocking position into a release position, in which the lock cylinder is released for a removal from the holder, by turning the cylinder core by means of an associated key.

Abstract: A locking system has a lock housing having first pin slots, a lock cylinder having second pin slots and being supported within the lock housing such that rotation of the lock cylinder is dependent upon a position of tumbler pins within the pin slots, and an idler block defining a keyway to receive a deviated key in which the idler block is rotatable relative to the lock cylinder between an entry position and a pin position aligning the key with the pin slots. One or more translating shields in the idler block are movable from an open position in which the keyway is unobstructed by the shield to allow for insertion or removal of the deviated key and a closed position in which the translating shield protrudes at least partway into a path of the keyway without interfering with rotation of the deviated key with the idler block.

Abstract: Provided is a key lock operable for locking and unlocking a latch control mechanism. The key lock includes a key collar with a front face, an outer cylindrical surface, and a longitudinally extending key slot. A center collar is concentrically disposed about the key collar such that an inner cylindrical surface of the center collar is fit to and rotatable on the outer cylindrical surface of the key collar. A series of cylindrical rotating pins are disposed in the center collar, each rotating pin having a notch with a key ID surface configured to engage one of a corresponding series of ID cut surfaces of a key when the key is inserted in the key slot and rotated to a key verification position, thereby rotationally orienting each pin at a respective ID position.

Abstract: A cylinder lock with a rotating tumbler pin, a sidebar, and a slider has a keyway with a ward projection into the center of the bitting area of a key blade received by the keyway. The tip of each rotating tumbler pin seats on the bitting surfaces remaining to the sides of this center ward of the key, and the tumbler pins that are engaged by the bitting on the side of the key blade do not seat on more than half of the width of the blade. Half the pin width is removed from each tumbler pin near the tip thereof. The key has a bitted section at which one or more bittings are formed and a non-bitted section bitting that is devoid of bitting. The bittings extend at a constant depth to an edge of the key blade.

Abstract: A lock assembly includes a lock housing with an annular wall separating an end wall and a face. A core is received in an opening disposed in the face. The core defines a keyway disposed in rotational engagement with an end portion for actuating the lock assembly between locked and unlocked positions. A drive member is rotationally interconnected with the end wall of the housing. The drive member is disposed in driven engagement with the end portion of the core. An adapter defines a generally X-shaped slot and is fixedly attached to the end portion. A tail piece is received by the slot. The tail piece defines an elongated substantially flat appendage including a proximal end retained in the adapter and a distal end extending outwardly from the adapter. The proximal end is twisted relative to the distal end between generally 40 and 50 degrees.

Abstract: A cylinder lock includes a side bar assembly comprising a binding bar and a testing bar and code pins, each comprising a key projection, a code hole, and binding features. Partial rotation of the cylinder causes the binding bar to engage the binding features of the code pins to prevent radial movement of the pins. If the code holes of the code pins are aligned with code points of the testing bar, the testing bar is able to move inwardly with the binding bar and out of the slot so as to permit the cylinder to rotate within the bore. If one or more code holes is not aligned with a code point of the testing bar, the code point will contact the body of the code pin and thereby be prevented from moving radially inwardly out of a locking slot, thus blocking rotation of the cylinder.

Abstract: A plug assembly including, a plug, a sidebar movably mounted on the plug, and a plurality of rack pins seated in the plug. The sidebar is biased to an outer position in which the sidebar extends beyond an outer surface of the plug. Each rack pin is a single-piece unitary structure including a key-following leg, and a sidebar-engaging leg. The sidebar-engaging leg includes at least one true gate and a plurality of false gates. When a true gate of each rack pin is aligned with the sidebar, the sidebar is free to move radially inward to an inner position.

Abstract: A torque augmentor operatively associated with the cylinder assembly and the plug assembly of a pin tumbler lock cylinder increases the threshold torque required to rotate the plug assembly in the cylinder assembly, thereby hampering an attacker's “feel” for the relationship of the cylinder pins to the shear line, and of the plug assembly to the cylinder. One embodiment of the pick-resistant lock cylinder includes a spring-biased ball normally disposed across the shear line. Another embodiment has a cam normally biased into engagement with a cam follower, the cam being disposed on one of the cylinder assembly and the plug assembly, and the cam follower being disposed on the other. Another embodiment includes an hourglass-shaped false shear line creator operatively associated with the cylinder assembly and plug assembly. The coaction of the torque augmentor and false shear line creator of the lock cylinder of the present invention also hampers an attack by bumping.

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: 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: The invention relates to a lock cylinder for a baggage lock having a cylinder housing, furthermore having a cylinder core which is rotatable in the cylinder housing and which has a keyway with a key introduction opening and having a plurality of tumblers which are arranged in two rows which are oppositely disposed along the key channel, with the lock cylinder being able to be actuated by means of an associated dimpled key which comprises, on two mutually oppositely disposed flat sides, a respective coding section provided with dimples and a respective end section adjoining said coding section and extending up to the tip of the key, with the associated key in particular being of the type TSA006 and with the tumbler of at least one of the rows furthest from the key introduction opening being arranged in a section of the key channel which receives the dimple-free end section of the associated key.

Abstract: The present invention relates to a locking device and to an actuating device for activating said locking device.

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 cylinder lock and key combination includes a cylinder lock with a housing accommodating a rotatable key plug having a keyway. A row of tumbler pins are arranged in corresponding cylindrical chambers for engagement with coded V-cut bittings of an associated key. A longitudinal side bar with a row of inner projecting lugs each selectively registering with one or more recesses in the tumbler pins is slidingly journalled for transversal movement in the key plug. The coded V-cut bittings are at a respective angle and are located at a respective vertical level. The row of inner projecting lugs of the side bar is located above the top bitting level of the key blade. The tumbler pins are positioned in pin recesses located in a cylindrical outer surface and covered by a cylindrical wall part of an associated one of said cylindrical chambers, without communicating downwardly with the keyway.

Abstract: New and improved electronic locks and electronic keys with enhanced anti-tamper capabilities integrated into the electronic locks, additional contact-based communications and recharging capabilities in the electronic keys, and capabilities for an electronic lock to change the authorizations and characteristics of an electronic key by provide an access profile to the electronic key when the key touches the lock.

Abstract: The invention relates to a cylinder lock of the type of a disk tumbler cylinder having a cylinder housing and a cylinder core rotatable therein, with a plurality of blockable disk tumblers being provided in the cylinder core which have at least one respective engagement section. The disk tumblers are movable between an unlatched position and a latched position and are biased along a respective direction of bias into the latched position. In the latched position, the respective engagement section engages into an associated cut-out in the cylinder housing to block the cylinder core against a rotary movement relative to the cylinder housing. The cylinder core is rotatable in a rotary opening direction relative to the cylinder housing when the disk tumblers are in the unlatched position.

Abstract: A lock cylinder including a cylinder core rotatably supported about a cylinder axis in a cylinder housing; locking pin which blocks the cylinder core against a rotational movement in a radially outer blocking position and which releases the cylinder core for a rotational movement in a radially inner release position; tumbler disks rotatably supported between a latch position and an unlatch position, wherein each tumbler disk has a central reception opening for receiving a key and at least one peripheral cut-out for receiving the locking pin in the release position, wherein the locking pin can only be displaced into the release position when all the tumbler disks are in their unlatch position; and intermediate disks arranged along a cylinder axis in the cylinder core. A respective intermediate disk is arranged between two mutually adjacent tumbler disks, the intermediate disks having a predefined rotational play relative to the cylinder core.

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: A key body and an associated lock core are disclosed. The disclosed lock core includes a core body, a core sleeve, a core plug, and a side pin assembly including a side pin, a region pin, and a spring.

Abstract: A key mechanism that makes it possible to fix the key inside the cylinder bolt lock outphased from the original combination, thereby preventing the cylinder of the bolt lock from turning. The security of the key mechanism is also enhanced as a cylinder tumbler engages within a slot of the key blade and the key cannot then be expelled from the cylinder bolt lock. Therefore, it is impossible to insert another key or picklock from the other side of the cylinder bolt lock.

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 tumbler pin lock includes an auxiliary locking mechanism including an auxiliary locking pin to provide enhance locking in addition to the locking provided by the tumbler pins so that the lock remains locked even if the tumblers are picked or bumped into their unlocked positions.

Abstract: An anti-theft lock with plate tumblers includes two axial grooves (18) which are disposed at diametrically opposite locations on an inner wall of the lock (1) and an annular groove (10) which has a rectangular cross section and is provided on the inner wall of the lock (1) adjacent an end proximal to a key slot (21). A round controlling plate (8), of which the diameter is same as that of the core (2), is disposed between the lock cover (9) and the lock core (2). A key slot (15), which is narrower than the key slot (21) in the lock core (2), is provided in the round controlling plate (8). Two V-shaped grooves (16) are provided on the inner sidewall of the round controlling plate (8) and correspond to two ends of the key slot (15). Two swallowtail grooves (20), in which a brake shaft (4) is mounted, are provided on the lock core (2), Multiple tooth grooves (17), which are engaged with the brake position teeth (14), are disposed on the outer walls of the two ends of the plate tumblers (5).

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 lock core and key blank are disclosed. The disclosed lock core includes a core body, a core sleeve, a core plug, and a side pin assembly including a side pin, a region pin, and a spring.

Abstract: The present invention provides a locking system that is more secure and theft resistant than traditional key and cylinder systems. A hidden locking system is provided where access to the locking mechanism is hidden from view and cannot be rotated or engaged by screwdrivers, pens or other common tools. In another aspect the present a primary and all related secondary locking systems on an object such as a bicycle. In a further aspect the present invention provides lockup in applications where large and bulky key and cylinder systems are not possible or practical.

Abstract: A disengageable cylinder for a motor vehicle lock mechanism includes a fixed stator, a sleeve, a rotor, a driver, and an indexer. The sleeve is mounted in rotation about its axis in the stator, and is fixed axially with respect to the stator. The rotor is mounted in rotation in the sleeve and is fixed axially in the sleeve. Further, the rotor includes tumblers which can move radially under the action of a key intended to be inserted axially into the rotor. The driver provides a coupling between the rotor and a cam actuator, when the key is appropriate. The indexer can move axially between rest and disengagement positions and is under the effect of a rotation of the sleeve with respect to the stator subsequent to the rotor being rotated by means of an inappropriate key.

Abstract: A disengageable lock for a motor vehicle locking system includes a fixed stator, a sleeve, a rotor, a driver, and an indexer. The sleeve is mounted rotatably in the stator and is fixed axially relative to the stator. The rotor is mounted rotatably in the sleeve and is fixed axially in the sleeve. The driver is connected in disengageable rotation on the rotor. The indexer, which is axially mobile between rest and disengagement positions, is connected in translation in the stator by ribs surrounding the sleeve. When an appropriate key is inserted in the rotor, the driver couples the rotor and a cam actuator in rotation, releasing the lock. When an inappropriate key is inserted, the rotor and the sleeve rotate, causing the indexer to move toward the cam actuator. Because the indexer is rotationally immovable as a result of its connection with the stator, the cam actuator cannot rotate.

Abstract: A disengageable cylinder for a motor vehicle lock mechanism includes a fixed stator, a sleeve, a rotor, a driver, and an indexer. The sleeve is mounted in rotation about its axis in the stator, and is fixed axially with respect to the stator. The rotor is mounted in rotation in the sleeve and is fixed axially in the sleeve. The driver is connected in translation on the rotor. The indexer, which can move axially between rest and disengagement positions, is connected in translation on the stator. When an appropriate key is inserted in the rotor, the driver couples the rotor and a cam actuator in rotation, releasing the lock. When an inappropriate key is inserted, the rotor and sleeve rotate, causing the indexer to move toward the cam actuator. Because the indexer is rotationally immovable as a result of its connection with the stator, the cam actuator cannot rotate.

Abstract: A cylinder lock, includes a sleeve, a key plug arranged in the sleeve and having a key insert hole opening on an edge face of a key insert side, a key matching member movably supported on the key plug, detachably arranged in the sleeve and withdrawn from the sleeve by an insertion of a matching key into the key insert hole, and a clutch arranged on an opposite side of the key insert side of the sleeve for transmitting an unlocking movement of an operating handle to a locking mechanism.

Abstract: A system for obstructing movement of a pin in a pin tumbler lock is disclosed. The system includes a pin movable in a bore in a plug of a pin tumbler lock, and the pin has a channel formed thereon for receiving a portion of a sidebar of the lock. The system further includes a blocking member mounted on the pin and configured to obstruct movement of the portion of the sidebar along the channel of the pin.

Abstract: There is disclosed a key required to have a reduced mechanical strength. When an authentic key is inserted into the keyway in a locking device, only a plunger member starts to move from a standby position toward an operative position. When the plunger member is pushed to the operative position, an operating lever located in the locked position swings to the unlocked position. The operating lever unlocks a locking mechanism that is in a locked state. When an inauthentic key is inserted in the keyway, the plunger member and sleeve member move together to the operative position. The operating lever in the locked position does not swing. Thus, the operating lever maintains the body portion of the locking mechanism locked.

Abstract: The primary object of the present invention is related to a cylinder lockset with a focusing apparatus which is comprised of a rotary disc, an upper pins seat, a bottom pins seat and a lock pad. The rotary disc of the invention is transfixed with a certain number focusing holes. The upper pins seat is transfixed with a certain number real and dummy corresponding holes & pins. The real corresponding holes of the upper pins seat are corresponded to the focusing holes of rotary disc and be provided with the corresponding pins. The dummy corresponding holes of the upper pins seat have dummy pins, springs and spring pads, which can be or can not be corresponded to the focusing holes of rotary disc. The bottom pins seat is transfixed with a certain number corresponding holes which be provided with corresponding pins, springs that can be corresponded to the real corresponding holes of the upper pins seat and the focusing holes of rotary disc.

Abstract: A lock cylinder that includes a housing and a plug. The housing defines a cylindrical cavity, and an outer pin chamber in communication with the cavity. The plug is rotatable within the cavity, and includes a key slot, a cylindrical outer surface, and an inner pin chamber aligned with the outer pin chamber when the plug is in a locked position. An outer pin is housed in the outer pin chamber, and an inner pin is housed in the inner pin chamber. The inner pin is engageable with a key inserted into the key slot, and further engageable with the outer pin. The lock cylinder also includes a lock member in communication with the housing and the plug that selectively disables the lock cylinder in response to partial rotation of the plug from the locked position without an appropriate key in the key slot.

Abstract: A system for obstructing movement of a pin in a pin tumbler lock is disclosed. The system includes a pin movable in a bore in a plug of a pin tumbler lock, and the pin has a channel formed thereon for receiving a portion of a sidebar of the lock. The system further includes a blocking member mounted on the pin and configured to obstruct movement of the portion of the sidebar along the channel of the pin.

Abstract: A lock device for use with a key is disclosed. The lock device includes a locking spindle including a plurality of locking spindle bores and a passage extending axially along an axial length of the locking spindle, and a driver structure including a plurality of driver structure bores. An interface between the driver structure and the locking spindle forms a shear line. The lock device also includes a plurality of combination pins in the plurality of locking spindle bores, and a plurality of driver pins in the driver structure bores in the driver structure, the plurality of driver pins being respectively associated with the plurality of combination pins.

Abstract: A lock includes a housing with a plug located in the housing. The plug is adapted to rotate in the housing about an axis. The lock also includes a moveable element comprising a first region with a first diameter, a second region with a second diameter that is less than the first diameter, and a third region with a third diameter that is less than the second diameter. The moveable element is located at least partly in the housing. The moveable element is adapted to move in an axis of motion substantially radial relative to the axis of the plug and to prevent rotation of the plug when the moveable element is in a first position along the axis of motion and to allow rotation of the plug when the moveable element is in a second position along the axis of motion.

Abstract: An axial spring balancing pin tumbler lock includes a cylindrical shell, a plug rotationally disposed within the shell and rotatable by a tubular key. The shell contains a plurality of first pin bores annularly and evenly defined to the axis of the shell for receiving first pins and first springs. The plug has a through aperture for engaging with a elongated spindle, a key bore coaxially defined on front end for receiving the tubular key, a plurality of third pin bores annularly and evenly defined on front end with same depth of the key bore for receiving third pins, and a plurality of second pin bores defined on rear end of the plug for receiving second pins and second springs. Each second pin may contacts the tubular key and one of third pins simultaneously.

Abstract: A lock core and key blank are disclosed. The disclosed lock core includes a core body, a core sleeve, a core plug, and a side pin assembly including a side pin, a region pin, and a spring.

Abstract: A key lock assembly includes a core, formed with a keyway to accept a key, mounted to a fixture for rotation along a break point formed between the core and the fixture. A block assembly and rows of pin assemblies are mounted to the fixture and the core and are each formed with a break point. In a locked position of the key lock assembly the block assembly and the pin assemblies interact between the core and the fixture preventing the core from rotating relative to the fixture. In an unlocked position of the key lock assembly the key is inserted into the keyway interacting with the block assembly and the pin assemblies registering the break points of the block and pin assemblies with the break point formed between the core and the fixture allowing the core to rotate relative to the fixture.

Abstract: A high security cylinder lock includes a housing comprising a plurality of driver pin bores for disposing spring loaded driver pins; a plug rotatable within the housing comprising a plurality of balancing pin bores for disposing spring loaded balancing pins and a plurality of combination pin bores for disposing combination pins. Each combination pin is sandwiched between a driver pin and a balancing pin. The extension force of the balancing spring at its pre-load length is greater than the extension force of the driver spring at its fully-load length. The compound force causes at least one combination pin partially extended into a corresponding driver pin bore in the housing when the plug is at its first rotational orientation in case of no key engaged. The key profile pushes the balancing pins to move to such position that all mating surfaces of the combination pins and the driver pins to lies onto the shear line of the lock.

Abstract: A lock assembly with a picking resistant shield has a main lock and a key. The main lock has a shield attached to a front end of the main lock. The shield has an inner recess and an outer recess smaller than the inner recess. The key has a neck corresponding to the outer recess of the shield and a driving tube corresponding to the inner recess of the shield and is selectively mounted into the shield to unlock the main lock. Thus, the shield prevents the main lock from being picked from the front end of the main lock by a picking tool. Personal goods or private matters being protected by the lock assembly with the picking resistant shield are safe.

Abstract: A pick-resistant lock system includes a locking means. The locking means includes a displacement sensor for sensing displacement so as to generate a displacement signal, the displacement sensor comprising a micro electromechanical gyroscope, a second counterpart, a second alarm, and a second control unit for receiving the displacement signal so as to start the alarm. A key includes a control switch, a second counterpart corresponding to the second counterpart, a second alarm, and a second control unit for receiving the displacement signal transmitted from the locking means so as to start the second alarm.

Abstract: A lock device for use with a key is disclosed. The lock device includes a locking spindle including a plurality of locking spindle bores and a passage extending axially along an axial length of the locking spindle, and a driver structure including a plurality of driver structure bores. An interface between the driver structure and the locking spindle forms a shear line. The lock device also includes a plurality of combination pins in the plurality of locking spindle bores, and a plurality of driver pins in the driver structure bores in the driver structure, the plurality of driver pins being respectively associated with the plurality of combination pins.

Abstract: My invention is to provide a new and useful apparatus for preventing the rotation of a key to open a deadbolt lock or the lock to be picked. By manufacturing the faceplate on the inside of the door out of solid metal. This would allow a slot to be machined in the face plate where I could put in a lever with a pivot screw, allowing the lever to be pulled out keeping the knob from turning and the dead bolt lock from unlocking. This may also be used on a side garage door or any entrance door to a home.

Abstract: A lock has a housing, a movable cylinder, a stationary cylinder, a limiting slide assembly and a latch bar. The housing has a cavity. The movable cylinder is mounted rotatably in the cavity and has a curved recess. The stationary cylinder is mounted securely in the cavity and adjacent to the movable cylinder and has a rail slot. The limiting slide assembly is mounted in the rail slot and has a limiting slide, a ball and a spring. The limiting slide is mounted slidably in the rail slot and has a ball recess for receiving the ball. The latch bar extends through the movable and stationary cylinders and has an annular groove for receiving the ball. The limiting slide assembly is compact and has a simple structure to improve the production rate and the lower the cost of the lock.

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 key for use in a cylinder lock with a rotatable key plug having a profiled keyway. The key comprises an elongated, substantially flay key blade (120; 120?) having a longitudinal profile groove (122; 122?) extending along at least a portion of the length of the key blade. The groove has an undercut portion (129) adjacent to a ridge portion (128, 128?), the outside of which forms part of a side surface (123; 123?) of the key blade. The undercut portion (129; 129?) of the groove is expanded, at its innermost part adjacent to and inside said ridge portion, into a longitudinally extending pocket (135; 135?).