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A door locking system is provided including a pair of doors of a vehicle adapted to pivot outward for allowing access to a cab. Each door has a slot for receiving a sliding window therein. A pair of hollow rigid tubes of a common length include a first tube and a second tube. In use, a first end of

A door locking system is provided including a pair of doors of a vehicle adapted to pivot outward for allowing access to a cab. Each door has a slot for receiving a sliding window therein. A pair of hollow rigid tubes of a common length include a first tube and a second tube. In use, a first end of the first tube is slidably situated within a first end of the second tube. A locking mechanism is connected between the tubes for selectively fixing a combined length thereof. As such, the tubes are extended such that second ends of the tubes are connected to the doors and further the locking mechanism is used to secure the same therebetween to preclude the doors from being opened.

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[ I claim:] [2.] A door locking system for use with a pair of doors of a vehicle adapted to pivot outward for allowing access to a cab, wherein each door has a slot for receiving a sliding window therein, the door locking system comprising:a pair of rigid tubes of a common length at least one of whi

[ I claim:] [2.] A door locking system for use with a pair of doors of a vehicle adapted to pivot outward for allowing access to a cab, wherein each door has a slot for receiving a sliding window therein, the door locking system comprising:a pair of rigid tubes of a common length at least one of which is hollow, the tubes including a first tube with a first diameter and a second tube of a second diameter greater than the first diameter, a first end of the first tube being slidably situated within a first end of the second tube;a pair of caps each including a hollow portion with an open face and a plate mounted to a closed face of the hollow portion and extending in generally perpendicular relationship with an axis of the hollow portion, whereby the hollow portions of the caps are each mounted to a second of the corresponding tube such that the plates extend downwardly and reside in generally vertical planes;a teeth assembly including a mounting block secured to a top of the first tube adjacent the first end thereof, an elongated strip having a first end coupled to a side face of the mounting block adjacent to a top face thereof with the strip extending in generally spaced parallel relationship with the first tube and extending past the first end thereof, a top face of the strip having a plurality of cut outs formed therein along an entire length thereof; anda locking mechanism including a sleeve mounted on the first end of the second tube, a pair of parallel arms integrally coupled to sides of the sleeve and extending upwardly therefrom above the strip of the teeth assembly, and a lever lock including an elongated handle pivotally coupled at an end thereof between upper ends of the arms about an axis generally perpendicular with respect to that of the tubes, the lever lock having a tab fixedly coupled to the end of the handle above the strip of the teeth assembly, the handle having a raised orientation for allowing the free sliding of the first tube within the second tube and a lowered orientation for bringing the tubes together and further locking their respective position;wherein the tubes may be extended such that the plates each may extend within the associated slot and further the handle may be lowered to secure the same therebetween to preclude the doors from being opened.