Abstract: The present invention relates to a commercial motor vehicle and heavy equipment battery locking device, methods of producing the same, and methods of utilizing the same. In particular, the present invention relates to a lockable device that covers the hold-down nut(s), hold-down bolt(s), and/or hold-down bracket(s) that secure a battery to a commercial motor vehicle or heavy equipment so that the battery cannot be stolen as well as a system for production and use.

Abstract: A toolbox device for actuating locking and/or unlocking of a power battery of a drive motor of a motor vehicle, the device including a supporting structure supporting a plurality of separate modules, each including at least one system for gripping a mechanism for locking/unlocking the battery and at least one actuator, a number of actuators being relative to a number of movements to be performed to implement the locking/unlocking the battery.

Abstract: The present invention provides an OBD connector with an enhanced abuse prevention effect for the OBD connector and further provides a compact OBD connector protective cover also applicable to an OBD connector installed in a narrow space. An OBD connector protective cover 1 is provided with an opening 2, a body case 3 that can accommodate an entire OBD connector 100 from the opening 2, a slide cover 4 that is slidably attached to the body case 3 and opens/closes the opening 2 by sliding thereof, and a lock mechanism 6 that has a key cylinder 5 provided on a forefront of the slide cover 4 in a visually observable manner and locks the slide cover 4 by an operation of the key cylinder 5.

Abstract: An anti-theft device for use on a hook of a carting container, the device comprising: an engagement unit including a shaft dimensioned to occupy an engagement portion of the hook, a first plate coupled to one end of the shaft, and having a passageway associated therewith, and a second plate coupled to an other end of the shaft, a retaining bar including a stop plate, a locking arm having at least one hole therein dimensioned to accept a lock shackle, the locking arm being dimensioned such that a distal end of the locking arm can be inserted through the passageway, the locking arm further having a length such that, when the distal end has been inserted through the passageway, the stop plate will be on one side of the engagement unit and the at least one hole will be on the other side of the engagement unit.

Abstract: A storage compartment in a vehicle is covered by closing a vehicle door over the storage compartment. The storage compartment may be disposed in an end cap, the door, or part of the door frame. An electronic locking system with mechanical latches, a cinching door system, or an electronic latching system with fully electronic latches may be adapted to include a lock override control. The lock override control may be actuated by a graphic view interface, a portable radio frequency switch, or a telematics controller.

Abstract: A lock includes a lock body, a lock bar, and a locking mechanism. The lock body extends in a longitudinal direction between a first end defining a longitudinal passage and a second end. The lock bar is disposed within the passage and movable in a longitudinal direction between a securing position proximal to the second end and a release position distal to the second end, with a proximal end portion of the lock bar and the second end defining a first gap when the lock bar is in the release position. The locking mechanism is assembled within one of the lock body and the lock bar and is operable between a locking condition securing the lock bar against movement from the securing position to the release position, and an unlocked condition permitting movement of the lock bar from the securing position to the release position.

Abstract: An apparatus and system for securing an item to a vehicle is disclosed. The apparatus includes an elongated cable, a retraction member, a coupling member, and a locking mechanism. The elongated cable is retractably received within the retraction member. The coupling member is secured to the retraction member. The coupling member is engageable with a vehicle receiver to secure the coupling member to the vehicle receiver. The vehicle receiver shaped to receive a separate hitch mounted accessory. The engagement between the coupling member and the vehicle receiver, in certain embodiments, is designed such that the vehicle receiver is accessible for receiving the separate hitch mounted accessory with the coupling member engaged with the vehicle receiver.

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 lock device includes a helical gear driven and rotated by a motor. The helical gear is connected to a hook stopper control member, which is moved to a projected position when the helical gear is rotated in a clockwise direction, and a lid latch, which is moved to a retracted position when the helical gear rotated in a clockwise direction. A coil spring constantly urges the lid latch to a projected position.

Abstract: A system for protecting vehicle wheels featuring a lug nut component for threading into a wheel; a keyhole disposed in the first end of the lug nut and a threaded second hole disposed in the second end; a sliding component disposed in the first hole biased in an up position and movable to a down position when a key is inserted; a sensor configured to detect the sliding component moving to the down position; a microprocessor operatively connected to the sensor; a transmitter operatively connected to the microprocessor; a receiver operatively connected to a car alarm system, wherein when the sensor detects the sliding component moving to the down position the transmitter sends an alarm signal to the receiver to activate the alarm system.

Abstract: An easy to use trailer anti-theft device that forms an integral part of said trailer comprising a front exterior wall mounted locking mechanism having a rotatable lock bar extending therefrom with the lock bar having an upper arm pivotally and swivelably connected to a lower swing bar that can be unlocked and moved from a stored position to a downwardly depending blocking position. The lock bar has a partially rotative lower swing arm that under force extends under the trailer substantially in the direction of the trailer king pin.

Abstract: A hitch lock device for preventing theft of a trailer featuring a hitch ball with a threaded bolt and a nut adapted to be threaded onto the bolt. Locking pin slots are disposed in the threaded bolt. A lock can be inserted into a slot in the threaded bolt. Locking pins are slidably disposed in each locking pin slot. The locking pins are connected by a spring and can move between an in position in the threaded bolt and an out position protruding from the bolt. The pins are biased in the out position by the spring. When the locking pins are squeezed to the in position the nut can be threaded past the locking pins to sandwich a trailer hitch with the hitch ball. When the lock is inserted into the slot the lock blocks movement of the locking pins and locking the lock prevents removal of the lock.

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: This disclosure relates to a novel concept regarding the specific latching mechanism to provide a secure and easily releasable device. The latching mechanism is used to attach an accessory such as a luggage rack or the sissy bar to a motorcycle or equivalent. The improvements provided herein are significant and novel in light of the prior art. The improvements add increased functionality, as well as protection to the internal moving components, protection of the user from the moving components, and in at least one embodiment, a locking mechanism for additional safety and security.

Abstract: A device is disclosed for locking to a gooseneck-type trailer tongue of the type having a lockable tongue mechanism and a lower surface. A ball member has a semi-spherical upper portion and a lower surface. The lower surface is traversed by a threaded aperture. A peripheral side of the upper portion has at least one set screw aperture traversing through to the threaded aperture. A tang is threaded at a top end thereof for threaded rotational engagement with the threaded aperture of the ball member and includes a lower end that has at least one bolt aperture therethrough. A collar member includes a tang slot traversing the top and bottom surfaces thereof. A puck lock has a selectively positionable bolt adapted to traverse the bolt aperture of the tang to lock the collar member onto the tang and ball member.

Abstract: An object of this invention is to provide a way for a person to lock and secure the hitch of an unhitched utility trailer. Another object of this invention is to allow a person to keep an unhitched utility trailer from being stolen when the utility trailer is not hooked to a truck hitch.

Abstract: A gooseneck trailer lock is provided including a body having a coupler engaging portion and a trailer frame engaging portion. A lock secures the body to the trailer.

Abstract: The present invention provides a trailer coupler having an integrated locking device attached to the handle or the coupler body. The handle of the trailer coupler moves from a first position where the hitch ball is insertable to a second position where the hitch ball is prevented from insertion. The locking device having a locking pin that is insertable into the aperture of the handle to prevent movement of the handle from the second position to the first position.

Abstract: An assembly for restricting access to a coupler includes a body having a coupler engagement portion for engagement with a first surface of a coupler, a coupler engagement member laterally movable within a laterally extending slot in the body, with the coupler engagement member extending perpendicularly from the slot for engagement with a second surface of the coupler opposite the first surface. The assembly further includes a securing mechanism for selectively securing the coupler engagement member relative to the body against lateral movement away from the coupler engagement portion. When at least a portion of the coupler is received between the coupler engagement portion and the coupler engagement member and the coupler engagement member is secured in a coupler lockout position, at least one of the coupler engagement portion and the coupler engagement member prevents withdrawal of the coupler from the assembly.

Abstract: An improved locking handle and power module assembly provides continued ability to open and close a truck cap or tonneau cover from within or without, and presents an enclosed mechanism to prevent obstruction or jamming. A release handle is provided to permit unlatching of a latch mechanism operated by the locking handle without regard to whether the locking handle is locked or not.

Abstract: A monitorable locking system for a truck cargo compartment closing cable including a cable engagement assembly arranged to selectably retain cable ends in mutually locked engagement, a monitorable locking element assembly and a mechanical lock for locking engagement with the monitorable locking element assembly via the cable engagement assembly, thus locking the cable ends in mutually locked engagement.

Abstract: A locking device according to the present invention, for use with a trailer gooseneck, the trailer gooseneck having a post with upper and lower ends, the upper end being attached to a trailer and the lower end. The lower end forms a recess and a pair of bore holes at a right angle to the centerline of the recess for accepting a coupler for receiving a hitch. The coupler is removed to allow insertion of the locking device. The locking device includes a body adapted to fit into the recess of the lower end, a pair of locking pins within the body of the locking device, a cam within the body of the locking device and a lock to prevent the cam from being turned when the lock is engaged. The locking pins face opposite directions and are adapted to be inserted into the bore hole on the two sides of the recess.

Abstract: A security device attaches to and secures a wheel of vehicle. The security device has a pair of arms for releasably engaging with a wheel and a locking assembly attached to or disposed between the arms. The locking assembly may include a static portion disposed on one of the arms and an actuatable portion disposed on the other arm. The actuatable portion is receivable within the static portion. The static portion may include one or more rack plates each having a plurality of tabs, with the rack plates being disposed in an opposite and spaced relationship, such that the actuatable portion is receivable therebetween. The actuatable portion may include a rotatable cam having a pair of oppositely disposed arms. The actuatable portion is positionable in a secured position in which the arms are respectively engaged with tabs of the rack plates, and an opened position in which the arms are disengaged from the rack plates.

Abstract: A seat back locking device for an automobile for a seat back 5 configured so as to be capable of being changed from an upright position to a folded-down position and vice versa, including a locking mechanism 10 for locking the seat back 5 in the upright position, a locking knob 20 for unlocking the locking mechanism 10, and a key cylinder 30 capable of locking and unlocking the locking knob 20. In the locking device, a contact part 33 that comes into contact with a contacted part 26 provided on the locking knob 20 is connectingly provided integrally with a cylinder body 31 of the key cylinder 30 so that the key cylinder 30 can be changed over between a locked state in which the contact part 33 comes into contact with the contacted part 26 to inhibit the rotation of the locking knob 20 and an unlocked state in which the contact part 33 does not come into contact with the contacted part 26 to allow the rotation of the locking knob 20.

Abstract: An antitheft system and method for construction equipment is disclosed. The antitheft system and method can prevent the construction equipment from driving if a driver gets out of a cabin in the state in which an ignition is turned on so as to preheat a heater or engine or in a case where a driving unit is not manipulated during a predetermined period.

Abstract: A freely pivoting lock ball fits within a trailer hitch ball receiver. A top lock shaft on the ball extends up through a hole in the top of the ball receiver into a lock collar welded to the top of the ball receiver. A cylinder lock fits into a top opening in the lock collar over the lock shaft to lock the lock ball within the ball receiver to prevent theft by towing the trailer with a conventional towing hitch ball. The cylinder lock and lock ball spin freely within the ball receiver and collar to prevent drilling or sawing the lock. There is no room between the cylinder lock and collar or between the ball lock and ball receiver to pry them loose. The lock collar is too thick for cutting with a bolt cutter.

Abstract: A key holding device includes a key cylinder capable of retaining an auxiliary key which is a vehicle key that is not a master key. A rotor is rotatably arranged in the key cylinder. The auxiliary key is insertable into the rotor. A tumbler is rotatable with the rotor in the key cylinder. The tumbler holds the auxiliary key in a manner irremovable from the key cylinder in accordance with the rotational position of the rotor. A key lock mechanism is capable of locking the rotor in a state in which the tumbler holds the auxiliary key in a manner irremovable from the key cylinder. A control unit selectively switches the rotor between a locked state and an unlocked state by controlling the key lock mechanism so as to permit removal of the auxiliary key when the rotor is in the unlocked state.

Abstract: A theft resistant strap and buckle assembly for securing cargo on a vehicle rack includes a strap and a buckle. The strap is reinforced to resist cutting. The buckle has a lock and pawl device that operates to prevent loosening of the strap when the buckle is locked.

Abstract: A grill guard apparatus for a vehicle with a bumper includes a grill guard pivotally attached at a bottom portion thereof to the bumper about a horizontal pivot axis located vertically between top and bottom edges of the bumper such that the grill guard can pivot about the pivot axis from an upright raised position in front of the vehicle grill to a lowered position extending horizontally forward from the bumper. Portions of the grill guard above the pivot axis bear against the bumper above the pivot axis when the grill guard is in the raised position, and portions of the grill guard below the pivot axis bear against the bumper below the pivot axis when the grill guard is in the lowered position and thereby support the grill guard in the lowered position. A lock mechanism is operative to maintain the grill guard in the raised position.

Abstract: A portable safe for assembly with an apertured member includes a safe housing and a safe door. The safe housing has an internal cavity extending to an access port, and at least one opening configured to align with at least one aperture of the apertured member. The safe door is securable to the housing to substantially block the access port. The safe door includes a locking mechanism having at least one locking member secured in a housing engaging position when the locking mechanism is in a locked condition. The at least one locking member is movable to a housing disengaging position when the locking mechanism is in an unlocked condition. The safe door further includes a lock interface that is selectively operable to move the locking mechanism from the locked condition to the unlocked condition.

Abstract: An assembly for restricting access to a coupler includes a body having a coupler engagement portion for engagement with a first surface of a coupler, a coupler engagement member laterally movable within a laterally extending slot in the body, with the coupler engagement member extending perpendicularly from the slot for engagement with a second surface of the coupler opposite the first surface. The assembly further includes a securing mechanism for selectively securing the coupler engagement member relative to the body against lateral movement away from the coupler engagement portion. When at least a portion of the coupler is received between the coupler engagement portion and the coupler engagement member and the coupler engagement member is secured in a coupler lockout position, at least one of the coupler engagement portion and the coupler engagement member prevents withdrawal of the coupler from the assembly.

Abstract: An assembly for restricting access to a coupler includes a body, a ball cavity engagement member; and a securing mechanism. The body is configured for engagement with at least one surface of the coupler. The body includes a coupler engagement portion. The ball cavity engagement member is movably coupled to the body and configured for engagement with a ball cavity of the coupler. The securing mechanism can fix the position of the ball cavity engagement member relative to the body such that the assembly is secured to the coupler.

Abstract: An apparatus for opening and closing a door of a glovebox mounted in an instrument panel. The apparatus includes a latch mounted to either the door or the instrument panel, a push button mounted to the other one of the door or the instrument panel, a rack bar connected to the push button and extending inward, a pinion engaged with the rack bar, and a link having a rack gear engaged with the pinion. The link is movable to lock and unlock the latch.

Abstract: An adjustable coupler lock for locking a trailer hitch such that a trailer cannot be removed from a vehicle. The coupler lock comprises a lock body with a locking mechanism and a locking plate, and also comprises a shaft having a narrow and a flange end, and also having multiple recesses along the length of the shaft for engagement with the locking plate of the lock body. The recesses along the length of the shaft have a vertical edge which engages the locking plate such that the lock body cannot be removed from the shaft without unlocking the locking mechanism. The recesses also have a tapered edge that allows for slidable movement of the lock body along the shaft, without unlocking the locking mechanism, for the purpose of adjusting the lock to the size of the latch.

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

Abstract: An apparatus includes a cylindrical housing for fitting about a spigot. The housing has a first bore extending along a partial length thereof and a first end. The housing further has a second bore, abutting against the first end of the first bore, which has a lesser diameter than the first bore diameter. A cylindrical sleeve includes a bore extending along a partial length thereof, a rough outer surface, has opposed ends, and has a length less than that of the housing. One end is engageable with the spigot. The sleeve is engageable within the first bore such that another end thereof abuts against the first end of the first bore. Another sleeve end includes a lip portion extending inwardly therefrom. A mechanism is included for securing the sleeve and housing to the spigot such that the spigot is rendered inoperable while the sleeve and housing are connected thereto.

Abstract: A dashboard with a glove compartment cover is created according to the invention, in which the dashboard and the glove compartment cover have a surface skin and a foam layer underneath it, and one of the foam layers comprises a first recess. The dashboard furthermore comprises a locking mechanism for locking and unlocking the glove compartment cover and comprises a switch for actuating the locking mechanism. The dashboard is characterized in that the switch is arranged in the first recess of the foam layer under the surface skin.

Abstract: A semi-locking license plate holder for an automobile including a rear frame, a frame cover and optionally a transparent plate. The rear frame has at least one fastener attach point for insertion of at least one fastener such that the fastener head abuts the rear frame securing it to the automobile. The frame further includes an assembly mechanism having at least one pin arm. The pin arm has at least one pin for attachment to the frame cover. The frame cover has at least one pin hole designed to align with at least one pin on the pin arm such that the pins may be inserted into the pin hole or holes. The frame cover has at least one fastener head cover for covering at least one and preferably all of the fastener heads such that the fastener heads cannot be used to remove the license plate without first removing the frame cover.

Abstract: An apparatus for locking roof racks and cross bars of a roof carrier realizes easy production and reduction in production costs through structural simplification. The apparatus comprises a pair of roof racks, in an inner surface of each of which a plurality of fixing holes is formed at regular intervals; at least two cross bars, each of which is coupled with the roof racks at opposite ends thereof in the widthwise direction of the vehicle; a pair of fixing members, which are located at opposite ends of the cross bar and are detachably coupled to the fixing holes in the roof racks; operating means, which are coupled to the opposite ends of the cross bar so as to couple and uncouple each fixing member to and from each fixing hole; and a connecting means, which connects the fixing members so as to interact with the fixing members in the cross bar.

Abstract: An adjustable coupler lock for locking a trailer hitch such that a trailer cannot be removed from a vehicle. The coupler lock comprises a lock body with a locking mechanism and a locking plate, and also comprises a shaft having a narrow and a flange end, and also having multiple recesses along the length of the shaft for engagement with the locking plate of the lock body. The recesses along the length of the shaft have a vertical edge which engages the locking plate such that the lock body cannot be removed from the shaft without unlocking the locking mechanism. The recesses also have a tapered edge that allows for slidable movement of the lock body along the shaft, without unlocking the locking mechanism, for the purpose of adjusting the lock to the size of the latch. The components of the coupler lock are made of stainless steel.

Abstract: An integral keyed lock (10) for a trailer trigger-lock coupler for use as an aftermarket kit or to be incorporated by an original equipment manufacturer. The coupler integral keyed lock (10) utilizes an actuating lever (20) that is configured to interface with and enclose a lock (52). The lock (52) is preferably keyed and includes an outward-extending plunger (54). The lock is disposed within the actuating lever, inside an enlarged portion (26) of one end. The plunger of the lock extends when actuated with a key and prevents rotational travel of the coupler trigger latch, thereby locking the trailer coupler until the plunger is retracted with the key.

Abstract: A locking device includes a shackle member that includes an elongated shank portion, a stop portion on a first end and a latch portion on a second end. A locking head includes a locking mechanism that has an entryway to receive the latch portion and is movable between a locked state to retain the latch portion and a unlock state to release the latch portion. A head cover includes a cover portion that engages the locking head and a flange portion that extends inwardly to define an opening to receive the latch portion therethrough. A seal structure is associated with the inner edge of the flange and sealably engages the outer surface margin of the latch portion. The seal structure may be a margin of the flange portion or a separate O-ring. The lock may be constructed as a lockable hitch pin.

Abstract: A multifunctional vehicle lock including a cylinder lock comprising a rotatable tumbler, a coupling member rotationally linked to the tumbler, wherein rotation of the tumbler rotates the coupling member, a first vehicle locking element connected to the coupling member, and a second vehicle locking element connected to the coupling member, wherein rotation of the coupling member moves the first vehicle locking element in a translatory movement along a first axis and simultaneously moves the second vehicle locking element in a translatory movement along a second axis angled at a non-zero angle with respect to the first axis.

Abstract: A trailer lock and particularly a trailer lock for locking a trailer ball cap includes a lock housing, a lock, a latch bolt, a holding seat and a detent member. The lock housing has an opening to hold the lock, a U-shaped trough to hold the latch bolt, a through trough to hold the holding seat and allow the detent member to slide on the holding seat. The lock has a housing chamber on one side to couple with the trailer ball cap. The latch bolt can control movement of the detent member by turning of the lock so that the detent member is wedged in a latch trough on one end of the latch bolt, and a latch end of the latch bolt is extended and anchored in the housing chamber of the lock housing and locked on the trailer ball cap. When the trailer is separated from a vehicle, the trailer ball cannot be coupled thereby to provide theft-proof function.

Abstract: The present invention is a method of using a durable, cylinder-like device that is inserted within the main cylinder part of a kingpin lock. One preferred embodiment, of several, has an outside diameter in close tolerance to the inside diameter of a kingpin lock device. In addition, the holder is easily insertable into the kingpin lock device. A round hole is located within the wall of the holder such that the hole in a cylinder wall of each kingpin lock device aligns with the hole in the holder. The diameter of the hole in the holder is sufficient to allow a metal tongue to be inserted from the kingpin lock device through the hole in the holder. Then a key in the lockpin device is removed leaving the lock device secured to the holder. In addition, the holder has a metal plate perpendicularly welded to the cylinder part. The surface could be the underside of a trailer or box or in a storage compartment behind the cab of a tractor.

Abstract: A method utilizes a locking device that includes a shackle member having a shank with a latch portion and a stop at opposite ends. A locking head mounts in a locked state on the latch portion but is removable when unlocked. A sleeve is carried on the shank but is removable. The sleeve and the shank together define a size conversion structure for the shackle. When the sleeve is on the shank, the shackle has one operative thickness to closely fit one size aperture, but when the sleeve is removed, the shackle has another, smaller operative thickness to fit a smaller aperture. A retaining member may be employed to resist removal of the sleeve. Two or more sleeves may be used to fit more than two apertures. These can be separately mountable onto the shank or may be nested on the shank, one inside of the other.

Abstract: A method and apparatus to secure the coupler section of a trailer provides a locking device that includes a lock housing having a hitch ball element to engage the recess in the coupler, a shackle member lockable to the housing and having a bridge section that spans the hitch ball element, and a latch assembly to latch and unlatch the shackle member. The shackle member is shown to be U-shaped with legs that extend through and secure to the lock housing. The latch assembly provides a ratchet-type engagement to allow adjustable locking. A rotatable lock mechanism drives a cam based latch mechanism between a latch state and an unlatch state.

Abstract: A locking assembly which comprises at least a first housing member which is designed to be secured to a second member, the housing member having a channel extending therethrough and an elongated inner component with an axially extending cavity therein, an actuator which is axially movable within the cavity and moves the locking protrusion into locking engagement with a recess associated with the second member, and a stop to limit the axial movement of the actuator. A lock is mounted internally of the actuator and engages the actuator and the inner component when in a locked position to prevent axial movement of the actuator while engaging only the actuator when in the opened position to permit axial movement. The locking assembly is particular suitable for use with various types of trailer hitches.

Abstract: A seat attachment structure for a vehicle having a seat hinge attached at one end of a seat, a first seat hook attached at the other end of the seat, a second seat hook attached substantially at the center of the seat, and a main locking mechanism and a sub-locking mechanism connected by a second cable. When locking the main locking mechanism, the sub-locking mechanism may also be brought into the locked state in conjunction therewith, and thus the seat can be locked easily and reliably. In addition, by providing a seat hook for the main locking mechanism at the other end of the seat, the seat hook for the main locking mechanism may be positioned at the farthest point form the hinge attached at one end of the seat. Therefore, when locking the main locking mechanism by pressing the end of the seat above the main locking mechanism downward by hand, a downward pressing force required to be exerted on the seat for generating a moment about the hinge may be reduced.

Abstract: An embodiment of the present invention is a king pin lock device that prevents theft of trailers and other objects equipped with a king pin trailer hitch. The lock device has a lock body with a first end and a second end. The second end has a moveable lock bar to engage and disengage the king pin sitting in the first end, and an internal aperture to receive a conventional round puck lock or other suitable lock or locking mechanism. The puck lock is locked onto an immobile retaining bar on the lock body and secures the lock body onto the king pin, preventing any attempt to access the king pin trailer hitch. The puck lock is protected by a perimeter wall surrounding it in the second end of the lock body. The perimeter wall has a key insert window for user access to the keyhole of the puck lock.