Abstract: Determining a position of a deadbolt used to lock and unlock a door is disclosed. An electromechanical lock can include a deadbolt that can retract or extend along a linear path as the door is to be locked and unlocked. A sensor such as an accelerometer can rotate along a non-linear path as the deadbolt moves along a linear path. The accelerometer can determine a gravity vector that can be indicative of a position of the accelerometer along the non-linear path. A controller can then determine a position of the deadbolt based on the gravity vector.

Abstract: Tire theft prevention device and methods. At least some of example embodiments include a tire removal prevention device comprising: an elongate member having a first end and a second end, the first and second ends defining an elongate axis; a collar member coupled to the elongate member, the collar defining an interior cavity, a first aperture, and a second aperture opposite the first aperture, the second aperture having an area smaller than the first aperture; and a riser member coupled to the elongate member, the riser defining a third aperture having an area larger than the second aperture.

Abstract: A clamping device for a locking cylinder arrangement of a motor vehicle is disclosed which includes a clamping body, a receptacle arranged on the clamping body for fixing a locking cylinder. A first retaining element is arranged on the clamping body. A cap covers the clamping device and is fixed by a second retaining element. A dismounting element cooperates with a release in order to detach the covering cap. The dismounting element includes an edge element extending in the direction of the covering cap and forming a hollow space. The dismounting element arranged on the clamping body is accessible from outside through a dismounting opening in the covering cap.

Abstract: An electronic lockset with a radio frequency harvesting circuit. In one embodiment, the electronic lockset includes a mechanical locking portion movable between a locked position and an unlocked position. One or more energy consumption devices are provided that actuate the mechanical locking portion between the locked position and the unlocked position. A rechargeable battery provides electrical power to the energy consumption devices. A radio frequency (“RF”) transmitter and RF energy harvesting circuit are used to wirelessly recharge the battery. Typically, the RF transmitter is configured to transmit at a predetermined frequency. The RF energy harvesting circuit is tuned to the predetermined frequency and is electrically coupled with the rechargeable battery to recharge the battery.

Abstract: A system for the protection of an interior of a deadbolt lock and its associated door handle from intruders includes a deadbolt plate including an opening proportioned for enclosing and selectably engaging the door handle. The plate including a solid body element proportioned for engagement about an interior latch of the deadbolt lock and an enclosure proportioned to at least partially cover the solid body element and the latch when the solid element is positioned upon both the latch of the deadbolt lock and the plate is positioned on the door handle. An extension of the deadbolt plate is slidably positioned within an interior slot of the enclosure, and is proportioned to preclude movement of the deadbolt plate after it is positioned upon the latch of the deadbolt lock and door handle.

Abstract: A retaining device including a group of circular placed thorns and a mechanism functioned to push out, lock, unlock and restore the thorns. The retaining device is mounted at the end of the extendable sleeve member of a bar shaped steering wheel lock. The thorns are unlocked and restored automatically when the extendable sleeve member is restored.

Abstract: A strip passing through the object stored in the body, a retaining device for retaining the strip and an actuator with a locking area matching a locking area of one end of the strip. When the actuator is in a locking position, the end of the strip is coupled to the retaining device and when the actuator is in an unlocking position, the end of the strip can be decoupled from the retaining device. The locking area of the actuator has a protrusion and the locking area of the end of the elongated member has a recess for receiving the protrusion. Locking means or mechanisms may be provided for retaining the actuator at least in a locking position.

Abstract: A lock protection for a light vehicle is selectively engageable to a light vehicle docking stand for securing thereto. The lock protection comprises a body selectively covering a lock of the light vehicle. The body is movable with respect to the lock between a first position and a second position. When in the first position the body prevents access to the lock. When in the second position the body allows access to the lock. When the vehicle is disengaged from the docking stand, the body is movable to the second position. When the vehicle is engaged to the docking stand, the body is maintained in the first position by the docking stand. A lock and lock protection assembly is also presented.

Abstract: The present invention broadly provides a theft-resistant guard (20) for a roll-up door lock mechanism (21). The improvement broadly comprises: the guard (20) being non-removably mounted on the lock mechanism (21) for movement with the handle (29). The guard has a proximal marginal end portion (34) arranged to partially embrace the pivotal connection between the latch cam (24) and plate (23), has an intermediate portion (35) adapted to partially embrace the handle, and has a distal marginal end portion (36) adapted to partially embrace the hold-closed keeper (32) when the handle is in the closed position, such that the guard may not be readily removed from the lock mechanism.

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 alligning 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 safety shield for double-lock leg cuffs having a first lock for disengaging or releasing the leglets after the same have been applied to the legs of a prisoner, and a second lock for fixing the preset contracted position of the leglets on the prisoner's legs. The box-like shield comprises access slots in a wall thereof through which a portion of the associated leg cuff key may be inserted to actuate the second lock without opening the shield or revealing the first lock or removing the shield from the leg cuffs. This arrangement permits the shields to be secured over the leg cuffs prior to application to a prisoner and thereby enhances the officer's safety. The safety shield is also suitable for use with handcuffs including a pair of wristlets pivotally and rotatably connected by either an enlarged ring portion or a short link chain.

Abstract: A status detector and communication unit (20) for a padlock (10) having a body (11) and a shackle (12) at least one end (14) of which can be latched to and released from the body. The status detector and communication unit includes a casing (21) adapted to be securely retrofitted to the padlock so as to form a compact assembly without obscuring an operating mechanism (17) of the padlock, and a battery powered circuit (22) contained within the casing for co-operating with the shackle of the padlock for transmitting a signal indicative of a status of the shackle to a remote monitoring unit (93). The invention allows remote monitoring of a conventional padlock with little or no modification of the padlock.

Abstract: Deadbolt locking devices for preventing a deadbolt from being unlocked from the outside are provided. The deadbolt locking devices may include a connecting assembly, for engaging a door knob to provide leverage to resist turning of the handle of the deadbolt, and a housing member for engaging the handle of the deadbolt when in a locked position. The deadbolt locking devices can accommodate various configurations of door hardware without sacrificing convenience of use and without sacrificing confidence in its correct placement. Various configurations of door hardware can include the position of the deadbolt knob in relation to the door knob, the angular position of the handle of the deadbolt when it is in the locked position, whether the door is hinged on the left or right side and whether the deadbolt knob turns clockwise or counter-clockwise to lock the door.

Abstract: An electronic device that would remind the user to place his keys on a fixed place to avoid the inconvenience of forgetting where placing and searching after those keys. The device consists of a receiver that would be placed in a fixed place and of a fitted transmitter that would be attached to a key chain. When the keys with the attached transmitter would be in a proximity to the receiver there would be an alert or a reminder to place the keys, the transmitter, on the wall mounted key holder that the receiver is attached too.

Abstract: An improved clutch mechanism for electromechanical lock cylinders is disclosed. The aim of the invention is to improve the performance of the clutch mechanism and to increase the battery life of the motor which is included in the electromechanical lock cylinder. The improved clutch mechanism comprises an electromagnetic motor (2) with a threaded spindle (3) on its shaft; and a movable cart (4), which comprises a resilient device determined by two front springs (26) joined together at one of their ends by a common transverse portion (26?) engaged in a valley of the spindle (3) thread, which moves the movable cart (4) by means of the common transverse portion (26?) between a disengaged position and an engaged position, such that in both positions the common transverse portion (26?) carries out a continuous thrust on the spindle (3).

Abstract: A security device for hindering the unauthorized opening of safes includes first and second, retractably cooperable longitudinal members. First and second lateral members are provided at respective outer ends of the longitudinal members. A locking mechanism locks the first longitudinal member to the second longitudinal member. A tension spring retractably biases the second longitudinal member into the first longitudinal member. The locking mechanism can include a clamping member swivellably attached to the first longitudinal member and containing a pawl member, while the second longitudinal member includes a sawtoothed element. The clamping member can then be swiveled, so as to push the second longitudinal member further into the first longitudinal member. A vernier arrangement may be included to further tighten the lateral members against the walls of the safe. The device provides, firstly, a visible deterrent and, secondly, a physical barrier to would-be intruders.

Abstract: This invention has to do with security devices used to retain a deadbolt in a locked position on a door. The device is positioned on over a deadbolt actuating handle and positioned to straddle a doorknob located below the deadbolt handle. The deadbolt actuating handle is prevented from turning to an unlocked position by the device.

Abstract: A high security lock core structure includes a case, a core, multiple side bead units and multiple bead units. The case includes side holes for receiving the side bead units. The core includes bottom holes which communicate with the top holes. The bead units are located in the top holes and the bottom holes. Each side bead unit includes a side bead and a first resilient member. Each bead unit includes a bottom bead, a top bead, a second resilient member and a cover. The top bead of one of the bead units is replaced by a cone-shaped locking bead which has a cone-shaped base and located at the interfaces of the top and bottom holes to make the core be locked. When the core is in unlocked status by malicious ways, the bottom holes are moved to the side holes to lock the core again.

Abstract: A lock receptacle assembly having a body portion having a first end that includes a bore configured to receive a lock, an end cap removably securable to the first end of the body portion. The end cap having a through bore to allow passage of the lock, such that, when assembled, the lock can lock the end cap and the body portion together. The end cap interlocks with the first end of the body portion so that there is substantially no load on the lock when axial force is applied to the assembly.

Abstract: The present invention is in a first part is a door security system including an elongate J-frame to attach to a door-frame having a recessed groove defined within a first vertical piece. The J-frame snugly nestles within, and extends entirely along the groove. An elongate vertical member attaches to a door first vertical surface to entirely cover same and traverse at least the door thickness. The vertical member mates with the J-frame, to prevent unwanted force entry. In a second part, the invention includes an elongate U-frame to attach to a door having a recessed groove defined within a second vertical surface. The U-frame snugly nestles within and extends entirely along the recessed groove. An elongate T-frame attaches to, and extends axially entirely along, a second vertical door-frame piece. The T-frame mates with the U-frame to prevent the door from being removed from its frame.

Abstract: The invention relates to a monitoring system for monitoring a state of a door lock mechanism of a door or of a closure of a storage space of a means of transportation, comprising a generator and a sensor/actuator. The generator produces electrical energy from vibration energy, and the sensor detects the state of the door lock mechanism. The sensor uses the kinetic energy that is produced by the actuation of the door lock to generate an electrical signal, which is then transmitted to a microcontroller.

Abstract: Disclosed are embodiments of apparatus, methods, and systems for securing electronic articles, such as computers, for theft deterrence or prevention. In one embodiment, a body is provided, which is secured to an intermediary structure. The intermediary structure is, in turn, secured to the electronic article. The body may be configured as a mass such that it is of sufficient weight, shape, and/or size to allow for deterring theft. In some embodiments, the system is configured to render inaccessible, or at least impede access to, at least one piece of fastening hardware between the intermediary structure and the body and/or between the intermediary structure and the electronic article, thereby further deterring theft.

Abstract: A key-key holder combination includes a key shank and a key holder. The key shank includes a distal tip and a proximate end. The key holder is fixedly connected to the proximate end of the key shank. The key holder includes a key holding portion for retaining a plurality of other keys thereon. The other keys are releasable and reattachable to the key holder.

Abstract: A combination lock includes an outer case with an inner case received therein and the outer case has a chamber which communicates with a passage in which a latch is received. A spring is mounted to the latch and provides a force to move the latch in a direction away from the chamber. A front unit having two disks is located in the first chamber and a rear unit having two disks is located in the second chamber. The two disks of the front unit drive each other and the two disks of the rear unit drive each other. A first dial plate drives one of the disks of the front unit and a second dial plate drives one of the disks of the rear unit. When the notches are in alignment with each other, the end piece of the latch can pass through the notches and the lock is unlocked.

Abstract: A lock mechanism includes a cover plate positionable over a plurality of pin chambers in a cylinder housing wherein one or more of the pin chambers include an internal threaded portion. The lock mechanism includes one or more pin assembly caps that are operative to secure the cover plate to the cylinder housing of the lock by threadably engaging with threaded pin chambers. The pin assembly caps include an internal cavity sized to receive at least a portion of a pin assembly, such that threaded pin chambers and unthreaded pin chambers have substantially the same dimensions without substantially increasing the dimensions required for the lock mechanism. The pin assembly caps include a socket (e.g., a hex socket, a Phillips-type socket, or the like) that allow users to selectively remove and secure the cover plate to the cylinder housing common tools.

Abstract: A steering column locking device. More specifically, a steering column locking device for golf carts, and the like.

Abstract: Disclosed are internal lock mechanisms for doors of intermodal containers. The lock mechanisms include a lock member that moves between a locked position engaging a door to lock the door in the closed position and an unlocked position disengaged from the door to permit the door to move from the closed position to the open position. At least a portion of the lock mechanism is provided within or adjacent to the sill. In one instance, the lock member is biased toward the locked position, and a contact portion on a bottom of the container is contacted to unlock it. The lock mechanism may be accessed via connection openings in a corner fitting, for example. In another instance, hooks and hook receiving members are provided within an interior of the container, and rotated along a rotatable shaft between the two positions.

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: An anti-theft device for protecting a laptop computer or similar portable electronic product from theft or unauthorized removal includes at least one retaining assembly including a laterally extending retaining arm terminating in a retaining hook for engaging a lateral edge of the laptop computer or similar portable electronic product, a retaining leg depending from the retaining arm and a retaining base for receiving the retaining leg in a locked configuration. The retaining arm is adjustable to accommodate laptop computers or similar portable electronic products having various widths and a lock mechanism includes a shuttle fixed to a collar made of a magnetically attractive material and a biasing spring for biasing the shuttle into engagement with the retaining leg of the retaining arm.

Abstract: A lock assembly including a housing, a fastener that has a head, a lock member that is movable between a first position and a second position, and a barrier that is movably disposed within the housing. The barrier is displaceable between a first position at which the barrier at least partially covers the fastener head, and a second position at which the fastener head is generally accessible. The barrier is coupled with the lock member such that the barrier displaces from the barrier first and second positions when the lock member displaces between the lock member first and second positions.

Abstract: A locking arrangement includes a latch assembly, a locking mechanism, and a user operable opening member. The locking mechanism holds the latch assembly in a latching position when the locking mechanism is in a locked condition and allows the latch assembly to move to an unlatching position when the locking mechanism is in an unlocked condition. The opening member is movable from a normal position to an opening position. When the locking mechanism is in the unlocked condition, movement of the opening member to the opening position moves the latch assembly from the latching position to the unlatching position. The opening member is operatively connected to the latch assembly by a compressible member, such that when the locking mechanism is in the locked condition, movement of the opening member to the opening position compresses the compressible member without moving the latch assembly out of the latching position.

Abstract: A multistage lock apparatus has a base, a disk holder, two selecting devices, two disk sets and at least one interfering element. The base has a mounting panel and a central tube. The disk holder is connected to the base and has a mounting beam, two extending beams, a middle beam, a connecting beam and two mounting spaces. The selecting devices are rotatably connected to the base. The disk sets are respectively mounted on the selecting devices in the mounting specs of the disk holder and each disk set has a driving disk and at least one driven disk. The at least one interfering element is mounted securely on the disk holder and each of the at least one interfering element has a mounting tab and two elastic panels.

Abstract: A lock includes a housing, a cover, a lock cylinder holder, a lock cylinder, a cam, a resisting shaft, at least one latching block, and at least one first elastic member. The cover is secured to one end of the housing. A gap is formed between the cover and the housing. The lock cylinder holder is secured to the housing. The lock cylinder is rotatably mounted in the lock cylinder holder. The cam is received in the housing and secured to the lock cylinder. The resisting shaft is rotatably mounted in the housing and includes a frustum shaped end. The latching block is received in the gap. The latching block includes an inclined surface corresponding to the frustum shaped end. The first elastic member is configured to connect the latching block to the cover or the housing. An electronic device using the lock is also provided.

Abstract: The present invention provides a burglarproof lock using with a portable apparatus which has a slot. The burglarproof lock includes a lock apparatus and a protection portion. The lock apparatus has a housing, a first contact surface, and an engaging portion. The lock apparatus is disposed inside the housing. The first contact surface is formed on a side wall of the housing. The engaging portion connects with the lock apparatus and penetrates through the first contact surface. The protection portion has a second contact surface and a flange portion. The protection portion is disposed corresponding to the first contact surface, and an area projection of the flange portion is protruding from the first contact surface, wherein the engaging portion further penetrates through the second contact surface.

Abstract: A low-cost switch sensor remote dead bolt status indicator includes a switch sensor which starts a transmitter at a door lock location upon sensing of a dead bolt entering into a locked position. The transmitter is provided with a self shut-off feature operating after a fixed duration of minutes length has elapsed. The indicator also includes a receiver in a hand held unit, such as a key fob capable of receiving signals from the transmitter after the user presses an inquiry key on its surface. The hand held receiver having two indicators for alternately displaying the lock's dead bolt status as being locked or unlocked. In an alternate embodiment, the switch sensor is provided as an integral part bonded to the conventional manufactured metal strike plate dead bolt frame that is typically attached to the door jamb.

Abstract: A lock assembly includes a first lock unit and a second lock unit. The first lock unit includes a first housing and a first locking mechanism disposed in the first housing. The first housing has a receiving hole. The first locking mechanism is configured to be set either in a locking state or in an unlocking state. The second lock unit includes a second housing and a shackle disposed on the second housing. The second housing has a head and a body which is connected with the head and presented to be wedged into the receiving hole of the first housing. Additionally, the first locking mechanism is configured to lock or release the body of the second housing in or from the receiving hole of the first housing when the body is received in the receiving hole.

Abstract: A lock assembly including a housing, a fastener that has a head, a lock member that is movable between a first position and a second position, and a barrier that is movably disposed within the housing. The barrier is displaceable between a first position at which the barrier at least partially covers the fastener head, and a second position at which the fastener head is generally accessible. The barrier is coupled with the lock member such that the barrier displaces from the barrier first and second positions when the lock member displaces between the lock member first and second positions.

Abstract: A key having one end secured to a yoke mounted between in a casing to turn about a pivot axis between a position in which the key is retracted inside the casing and a position in which the key is extended, and a control pushbutton mounted in a housing of the yoke so as to be constrained to pivot therewith and so as to slide between a position for holding the yoke at least in the retracted position, and a position for releasing the yoke for pivoting, the control pushbutton having at least one stud received in a groove of the housing, the groove including an inlet segment that opens out via a first end in an outer face of the yoke and that opens out via a second end in a terminal segment, forming an angle therewith, the terminal segment extending along the pivot axis.

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 cylinder lock monitoring assembly for monitoring position of a lock cylinder. The monitoring assembly includes a housing having an inner cavity and an exterior diameter. The exterior diameter of the housing is not significantly greater than the corresponding cylinder diameter. The assembly further includes a switch received into the inner cavity of the housing. The switch is in electrical communication with an indicator. The switch is reactive to any change in position of the lock cylinder.

Abstract: The present invention relates to a device (1) for temporarily spacing an opening element away from a fixed element of a motor vehicle bodywork (15), comprising a mount (2) that bears means (3, 4) of attachment allowing the device to be anchored in the fixed element, and blocking means (6) designed to be able to deform elastically, characterized in that it comprises locking means (8, 10, 12, 13) capable of moving from an initial unlocked position in which the blocking means put up minimal resistance towards the opening element, to a locked final position in which the blocking means prevent the said opening element from moving back.

Abstract: A lock device comprises an interlocking means comprising two axially movable parts (61, 62) interconnecting a cylinder core (20) and an extension (40, 50) so that free-turning operation is provided in one mode of operation and the extension rotates with the cylinder core in another operational mode.

Abstract: A system is disclosed. It includes a portable electronic device comprising a lock interface member having a first aperture configured to engage with a first security apparatus and a second aperture configured to engage with a second security apparatus. At least one of the first security apparatus and the second security apparatus is engaged with the lock interface member.

Abstract: A door lock apparatus with safety switch capable of assuredly locking a door is provided. A coupling member is pivotally moved about a pivotal shaft by a closing operation by way of a rotary handle, thereby bringing an engaging portion thereof into engagement with a fixing member, so that a protective door is inhibited from moving in two directions of arrows X, Y including a moving direction of the protective door. Whether the protective door is of a slide type or a pivot type, the protective door is assuredly locked in a closed state because the protective door is inhibited from moving in the two directions including the moving direction thereof. Further, if an operation mistake or the like is made to forcibly open the protective door, the force for opening the protective door is not directly applied to the switch body or the actuator. Hence, a safety switch may achieve an increased in durability.

Abstract: A lock with a support structure includes a tubular element connected to a handle having a positioning hole and a center hole. The center hole contains a lock set having a rotatable lock core connected to a transmission element. The transmission element has separated first and second sides. A transversally slidable element is installed to the tubular element for receiving a bias pressure of an elastic element, and includes a protruding portion and a bearing portion. The protruding portion can be moved between engaged and non-engaged positions of the positioning hole of the handle. The support structure includes a support portion. If the first side of the transmission element approaches the support portion of the support structure, the bearing portion of the transversally slidable element will approach the second side of the transmission element for limiting the displacement of the transversally slidable element when an external force is applied.

Abstract: A locking device includes a shaft, a locking head joined to the shaft, and a lock body having a lock opening for receiving a locking end of the shaft. A latch member is disposed within the lock body and includes a shaft aperture for receiving the locking end of the shaft therethrough. The shaft aperture includes an edge portion spring biased radially inward of the lock opening to engage the recessed portion with the edge portion when the locking end of the shaft is disposed in the lock opening. A locking member is disposed within the lock body. Rotation of the locking member from a locked condition to an unlocked condition moves the edge portion of the shaft aperture out of engagement with the recessed portion of the shaft to permit withdrawal of the shaft from the lock opening.

Abstract: A method of bracing a security container relative to the structural features of a building in a substantially tamper-proof manner wherein the security container including at least one container (2) having an interior (3) for storing valuables therein, the container (2) having at least one opening (7) thereinto, a closure (8) covering the at least one opening (7) into the container (2), and locking (16) to secure the closure (8) over the opening (7), the security container being configured to be fitted into a recess within a surface and the security container further including retention, the retention including bracing (30a), the bracing (30a) characterized by effecting a brace relative to one or more permanent structural features associated with the surface to impede forced removal of the security container from the recess.

Abstract: A blocking apparatus is disclosed for selectively blocking movement of a deadbolt actuation lever on a door. The apparatus includes a base mounting plate for mounting on the door, the base mounting plate including an engaging portion for positioning against the inside surface of the door and a deadbolt receiving portion for positioning against the edge surface of the door. The apparatus also includes a mounting shaft mounted on and extending from the engaging portion and a blocking member mounted on the mounting shaft and movable between a block position and an unblocked position. The block position is characterized by the blocking member blocking movement of the deadbolt actuation lever from the locked orientation to the unlocked orientation. The unblocked position of the blocking member is characterized by the deadbolt actuation lever being free to move without interference by the blocking member.

Abstract: An external door for use in accessing a cargo area of an aircraft fuselage. The door includes a locking system, a latching system, a lock monitoring system, an uplock used to secure the door in an open position, and an actuating system that assists in at least one of opening and closing the door. The locking system works by interfering with the movement of the latching system components. The locking system includes a monitoring device that prevents the aircraft from being pressurized in case of a malfunction in the locking system. The latching system includes a handle locking system that prevents operation of the latch handle by accident or by ground loading or flight forces. The systems of the door are preferably manually operated, and utilize rigid members.

Abstract: Several embodiments are described which allow either the U-bar or the straight bar of a bicycle U-lock to act as the lever arm of a wrench which may be used to remove the wheel nuts of a bicycle. The invention allows bicyclists to carry a wheel nut wrench without adding any extra weight to the bicycle, since a U-lock is normally carried anyway. Having a wheel wrench facilitates emergency repairs such as changing tires.