초록 ▼

This invention relates to a security system aimed at closing and locking a cover of an opening of a tank trailer to avoid any tampering of its content and to prove that the content of the tank has not been tampered. The security system comprises a locking member movable between a lock position to pr

This invention relates to a security system aimed at closing and locking a cover of an opening of a tank trailer to avoid any tampering of its content and to prove that the content of the tank has not been tampered. The security system comprises a locking member movable between a lock position to prevent the opening of the cover, and an unlock position to allow the opening of the cover. The invention also comprises an actuating device mounted to the tank trailer operatively connected to the locking member for moving it between the lock and the unlock positions. A sealing mechanism engages the actuating device when the locking member is in the lock position to prevent any movement of the locking member. The sealing mechanism comprises a breakable indicator which is broken upon disengagement from the actuating device, thereby indicating that the openable cover has been tampered with.

대표청구항 ▼

The invention claimed is: 1. A security system for detecting if an openable cover covering at least one hole in a wall of a tank trailer has been tampered with, said security system comprising: a locking member mountable to the tank trailer and movable between a locked position wherein said locking

The invention claimed is: 1. A security system for detecting if an openable cover covering at least one hole in a wall of a tank trailer has been tampered with, said security system comprising: a locking member mountable to the tank trailer and movable between a locked position wherein said locking member blocks said cover from being opened, and an unlocked position wherein said locking member extends unobstructively away from said cover, said locking member comprising: a cantilever arm having an anchor end mountable to the tank trailer adjacent to the cover and a rotatable end rotatable around the anchor end, said cantilever arm being rotatable between the locked position where it extends over the cover and the unlocked position where it extends unobstructively away from the cover, said cantilever arm having a rotation path extendable in a plane generally in parallel with the wall of the tank trailer; a shaft adapted to project transversally from the tank trailer; and a tubular sleeve rotatably mounted around said shaft, the cantilever arm projecting radially from said sleeve; an actuating device mountable to the tank trailer and being operatively connected to the locking member in order to move said locking member between the locked position and the unlocked position; and a sealing mechanism capable of engaging the actuating device when the locking member is in the locked position in order to prevent movement thereof, said sealing mechanism comprising a breakable indicator which is broken upon disengaging the sealing mechanism from the actuating device, thereby indicating that the openable cover has been tampered with. 2. A security system according to claim 1, wherein the locking member further comprises a locking bolt affixed to said shaft to prevent removal of the tubular sleeve therefrom. 3. A security system according to claim 1, wherein the locking member further comprises a pair of stops located in the rotational path of said cantilever arm and blocking the rotation thereof beyond said locked and unlocked positions, respectively. 4. A security system according to claim 1, wherein the locking member further comprises a hook projecting from the tubular sleeve opposite the cantilever arm, said hook cooperating with the actuating device for moving the locking member between the locked and unlocked positions. 5. A security system for detecting if an openable cover covering at least one hole in a wall of a tank trailer has been tampered with, said security system comprising: a locking member mountable to the tank trailer and movable between a locked position wherein said locking member blocks said cover from being opened, and an unlocked position wherein said locking member extends unobstructively away from said cover; an actuating device mountable to the tank trailer and being operatively connected to the locking member in order to move said locking member between the locked position and the unlocked position, said actuating device comprising; a lever pivotally attachable to the tank trailer; and a metal wire having a first end connected to the locking member and a second end operatively connected to the lever; whereby pivoting said lever pulls on the metal wire to move the locking member from the unlocked to the locked position; and a sealing mechanism capable of engaging the actuating device when the locking member is in the locked position in order to prevent movement thereof, said sealing mechanism comprising a breakable indicator which is broken upon disengaging the sealing mechanism from the actuating device, thereby indicating that the openable cover has been tampered with. 6. A security system according to claim 5, wherein the lever is attachable to the tank trailer at a position reachable by an operator standing on the ground besides said tank trailer. 7. A security system according to claim 5, wherein the actuating device further comprises a rigid sleeve capable of intimately following an exterior surface of the tank trailer, the metal wire being slideably mounted therein. 8. A security system according to claim 5, wherein the actuating device further comprises a mounting structure for mounting the lever to the tank trailer, said mounting structure comprising a pair of mounting walls projecting from the tank trailer and defining a vertical channel therebetween for receiving said lever. 9. A security system according to claim 8, wherein the mounting structure further comprises a pivot shaft mounted transversally between said mounting walls, the lever being mounted thereto. 10. A security system according to claim 8, wherein the sealing mechanism comprises: a pair of aligned holes provided in said mounting walls; and a rigid pin receivable between said aligned holes to prevent the pivoting of the lever, said rigid pin cooperating with the breakable indicator. 11. A security system according to claim 10, wherein the breakable indicator comprises a cable securely attached to opposite extremities of the rigid pin when said pin is received between said aligned holes. 12. A tank trailer comprising: a tank having a manhole and a vent proximate to said manhole in a wall of said tank; an openable cover comprising a first disk for covering said manhole, a second disk for covering said vent and a linking member linking the two; and a security system for detecting if the openable cover has been tampered with, said security system comprising: a locking member mounted to the tank trailer and movable between a locked position wherein said locking member blocks said cover from being opened, and an unlocked position wherein said locking member extends unobstructively away from said cover; an actuating device mountable to the tank trailer and being operatively connected to the locking member in order to move said locking member between the locked position and the unlocked position; and a sealing mechanism capable of engaging the actuating device when the locking member is in the locked position in order to prevent movement thereof, said sealing mechanism comprising a breakable indicator which is broken upon disengaging the sealing mechanism from the actuating device, thereby indicating that the openable cover may have been tampered with. 13. A tank trailer according to claim 12, wherein the locking member comprises a cantilever arm having an anchor end mountable to the tank trailer adjacent to the cover and a rotatable end rotatable about the anchor end between the locked position where it extends over the cover, and the unlocked position where it extends unobstructively away from the cover. 14. A tank trailer according to claim 12, wherein the locking member comprises a cantilever arm having an anchor end mounted to the tank trailer adjacent to the cover and a rotatable end rotatable around the anchor end between the locked position where it extends over the linking member of the cover, and the unlocked position where it extends unobstructively away from the cover.