Patent ID: 8716609

Claim:
A weighing apparatus that is structured to be mounted to a platform apparatus of a roll-off truck, the platform apparatus having a vehicle frame and a movable platform, the weighing apparatus further being structured to determine a weight of a quantity of material that is situated in a container which is structured to be disposed on the roll-off truck, the weighing apparatus comprising: a number of weighing devices that comprise a number of weight measurement elements and a number of support elements; the number of weight measurement elements being changeable between a first condition and a second condition and being structured to be situated on at least one of the vehicle frame and the movable platform in the first and second conditions; the number of weight measurement elements in the first condition being structured to be engaged by the container with the quantity of material and to generate a number of outputs representative of a combined weight of the container and the quantity of material; the number of support elements being movable between a first position in which the number of weight measurement elements are in the first condition and a second position in which the number of weight measurement elements are in the second condition; the number of support elements in the first position being engaged with the number of weight measurement elements; the number of support elements in at least the first position being structured to be further engaged with at least one of the container, the vehicle frame, and the movable platform; the number of support elements being structured to be movable from the first position toward the second position when the container is removed from engagement with the number of weight measurement elements; the number of weight measurement elements in the second condition being structured to be disengaged from the container when the container is engaged with the platform apparatus; the number of support elements being structured to be returnable from the second position to the first position when at least a portion of the movable platform is spaced from the vehicle frame; and the number of weight measurement elements returned to the first condition being structured to be engaged by the container without the quantity of material and to generate another number of outputs representative of a weight of the container without the quantity of material; the number of support elements each comprising a removable plate element that is structured to be interposed between at least a first weight measurement element of the number of weight measurement elements in the first condition and at least one of the container, the vehicle frame, and the movable platform, the removable plate element being structured to be removable from between the at least first weight measurement element and the at least one of the container, the vehicle frame, and the movable platform to change the at least first weight measurement element to the second condition.