MX2008000085A - Viscous product transportation trailer - Google Patents

Abstract

Described herein is a transport tank trailer having a tank that can be used to more completely and effectively transport, store, load and unload a viscous product, such as a viscous liquid product, or liquid with solid(s) in suspension. Materials for transport, storing, loading and unloading include both food-grade and non-food grade products. Exemplary products include chocolate, paint, wastes, and asphalt. The tank system involves:a) agitation means (e.g., vibration devices) to force viscous product to flow during unloading;b) a heat-traced closed loop venting and unloading system resulting in the elimination of opening of the manhole on the tanker, which results in the release of heat;c) use of enhanced insulating materials to reduce product solidification during product discharge;and d) reduction of thermal bridges to increase product heat retention. The invention also involves an inventive cargo tank shape that promotes viscous product discharge during unloading of the tank. The viscous product trailer can further comprise a heated make-up air system operably associated with the tank housing. The system can provide heat vented air and heated air into the tank interior containing viscous product so as to maintain tank, and consequently product, temperature.

Description

TRAILER TRANSPORTATION OF VISCOSE PRODUCTS CROSS REFERENCE TO THE RELATED APPLICATION This application claims the benefit under 35 USC §119 (e) of the Provisional Application of E.U.A. Nos. 60 / 695,148, filed on June 29, 2005 and 60 / 758,438, filed on January 12, 2006.

FIELD AND BACKGROUND The present invention relates to a trailer or trailers for transport that have cargo tanks, and more specifically to trailer loading tanks for the transport of viscous products. '- •. / v r; . i Transport trailers are used to transport a variety of products, including viscous products, both food grade and non-food grade. However, these products are often difficult to store and transport, and are often even more difficult to discharge. Due to the nature and properties of the product itself, the discharge often results in an unwanted amount (often up to 1% of the total cargo transported, or even more, of waste product (ie waste) ) that remains in the tank after discharge.

The interior of the trailers must be thoroughly cleaned between the loads of the excess residue (product that remains after the discharge of the tank). Current solutions require drivers or other service personnel to manually clean residue from the trailer tank. This cleaning takes time, and is therefore expensive, and even more, it can be I I dangerous since such cleaning requires service personnel to climb to the top of the trailer and enter the tank through a service record. This is a process that can cause injuries. Moreover, if the material being transported is a non-food grade material, and is in particular a hazardous material, the product itself can be very dangerous (eg, gases, flammability, etc.) for cleaning people.

Accordingly, it would be desirable to provide discharge of viscous materials from the cargo tank trailers in a manner that minimizes or minimizes product waste, in a safe manner (eg, with the service personnel carrying out the discharge at the floor) and in an economical way. 1 IH 'J M: BRIEF DESCRIPTION OF THE DRGS The embodiments of the invention are described with reference to the accompanying drgs and are for illustrative purposes only. The invention is not limited in its application to the details of construction or arrangement of the components illustrated in the drgs. The invention is capable of other modalities or of being performed or carried out in various other ways. Similar numerical references are used to indicate similar components. In the drgs: Figure 1 is a schematic side view of a motor vehicle having a trailer for transporting a viscous product to discharge a viscous product, according to one aspect of the present invention; Figure 2 is an enlarged view of an embodiment of a cargo tank of an inventive viscous product, for the storage, transport and discharge of a viscous product; Figure 3 is an enlarged view of the top of the cargo tank for a viscous product taken < along line 3-3 of Figure 1; Figure 4 is an amplified view of a thermal line assembly for use with the cargo tank of a trailer for transporting a product; Figure 5 is an enlarged cross-sectional view of a portion of the cargo tank for a viscous product, taken along line 5-5 of Figure 2; Figure 6 is a schematic side view of a motor vehicle having a trailer loading tank for the transport of a viscous product, for the discharge of a viscous product, according to an aspect of the present invention and illustrating the introduction of heat to the trailer from the vehicle's engine; Y Figure 7 is an enlarged cross-sectional view of a portion of the cargo tank of a trailer for transporting a viscous product, taken along line 7-7 of Figure 6.

Figure 8 is an enlarged view of another embodiment of a trailer loading tank for the transport of an inventive viscous product, for the storage, transport and discharge of a viscous product, i1 '< ) ' according to an aspect of the present invention, which shows the cargo tank including the assembly of a heated cabin and the assembly of an agitator; Figure 9 is a top view taken along line 9-9 of Figure 8, showing a portion of the cargo tank having a heated fill air assembly; ' Figure 10 is a rear view taken along line 10-10 of Figure 8, showing the assembly of the heated cabinet, in accordance with an aspect of the present invention; Y Figure 11 is an enlarged, partially schematic view of the assembly of the heated cabinet. . I 1, 'DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Figure 1 is a schematic side view of a motor vehicle with a loading tank 10 having a transport trailer with a loading tank 12 for a viscous product for the discharge of a viscous product, or a trailer for the transport of a viscous product, according to an aspect of the present invention. The vehicle 10 includes a tractor 14 having a cab 16 for pulling the trailer, and the trailer includes a loading tank for a viscous product 18. In one embodiment, the tank includes a single compartment or section and is therefore capable of transport a single product. In another embodiment, the tank includes a plurality of compartments, and therefore, is capable of transporting a plurality of types of material, some or all of which may be viscous products. As used herein, "viscous products" includes liquid viscous products, both of food grade and non-food grade type. The examples of food-grade viscous products include, but are not limited to, chocolate, and examples of non-food grade materials include, but are not limited to, hazardous materials, such as paint. Moreover, the "viscous products" are intended to include liquids with suspended solids, and possibly wastes.

The MC 300 series of cargo tanks, the DOT 400 series of cargo tanks and the cargo tanks with non-DOT specification are contemplated for use with the present invention. These tanks may be constructed of mild steel or stainless steel or aluminum (for example, which is desirable, a relatively lightweight material) and typically have a load capacity of between 13,248.94 to 45,424.94 liters (3,500 to 12,000 gallons). . Figure 2 is an enlarged view of an embodiment of an inventive cargo tank for viscous products for the storage, transport and discharge of a viscous product. The tank 20 includes a cover or housing 22 having a cylindrical section 24 and a conical section 26, which are attached to a cylindrical-conical interface 23 and are joined by torispherical heads 25 and 27, respectively. In one embodiment, the conical section may be a cone or straight circular conical section substantially truncated. As shown, the cylindrical section 24 includes service records 28, located on the upper part of the cover, to allow individuals to enter the cover for tank cleaning and maintenance purposes. The tank 20 further includes reinforcement rings 30 which serve to support, and thus improve, the structural integrity of the cover.

Figure 3 is an enlarged view of a section of the upper portion 32 of the cargo tank of a trailer for the transport of a viscous product 20, taken along line 3-3 of Figure 1. Referring to FIGS.

Figures 2-3, the portion of the housing 24, located between the rings 30 and near the service register 28 are the ventilation for the thermal line 34, the ventilation valve for the thermal line 36, and the vacuum-regulating valve for the line thermal 38. In one embodiment, the vent valve 36 may be hydraulically operated. The positions of the ventilation, the ventilation valve and the vacuum-regulating valve can be modified according to the needs, depending on the particular dimensions and shape of the tank and of the viscous materials contained, transported, stored, loaded and unloaded.

Figure 4 is an enlarged view of the assembly of the thermal line, generally referred to as number 40, also for use with the cargo tank for a viscous product of the present invention. The assembly 40 is connected to the cover or housing 24 and includes a vacuum, valve or vacuum-regulating valve, collectively referred to as the number 42 and a nozzle 44. The heat enters the assembly 40, as indicated by the arrow 46, by means of of the heat input 48 and leaves the assembly, as indicated by the arrow 50, through the heat outlet 52.

Figure 5 is an enlarged cross-sectional view of the cargo tank for a viscous product 20, and more specifically the cylindrical section 24, taken along line 5-5 of Figure 2. Referring to Figures 2 and 5, the tank section 24 includes the insulating material 60 which, in one embodiment, can be a rigid insulating material suitable for use with the viscous products contained within the interior 62 of the tank 20, and limited by the cover or housing 22, which is referred to below.

Referring still to Figures 2 and 5, the agitating devices 70 are positioned along the cover 22 to drive the viscous product towards outside the tank 20 during the discharge, thus reducing the product residue. In one embodiment, the agitating devices 70 comprise a plurality of vibrators. In another embodiment, the agitation can be carried out using ultrasound, magnetic and other means of excitation / agitation. As shown, the devices 70 are positioned along the sections of the tank cover 24, 26 in a longitudinal manner, opposite one from the other. In other words, a first device plurality 70a is positioned opposite to a second plurality of devices 70b. As specifically shown in Figure 5, devices 70a and 70b can be placed at an alpha arc angle, and in one embodiment, alpha is substantially equal to 120 degrees. As indicated in Figure 2, the placement and number of devices 70 may vary according to convenience, with alternative or additional devices shown in dotted line. One device 70 contemplated for use in the present invention is the DC-500, available from Vibco, located in Wyoming, Rhode Island.

Referring to Figures 2-5 ', the heat can be introduced into and circulated around the cargo tank 20 by means of the entry of the thermal line 40. The arrows 80, 82 indicate the heat circulation around the the conical and cylindrical sections 24, 26, respectively. The heating of the viscous product inside the tank and the reduction of the thermal variations can facilitate the maintenance of the material in a liquid state, thus reducing the product residue. As described with reference to Figure 4, heat can enter and exit the cylindrical section 24 by means of the heat inputs and outputs 48, 52, respectively. Also, as shown in Figure 2, the tank 20 includes an outlet valve for the thermal line 84 (connected to the cylindrical section 24), which can be hydraulically operated. The circulation, ventilation and similar heat, inside the tank for viscous products of the kind described herein, can be referred to as "closed-cycle ventilation of the thermal line". A valve contemplated for use in the present invention is a 92.4 cm (3"), 180 degree" Cleanflow "hydraulic foot valve, available from Fort Vale, located in La Porte, Texas. The insulating material 60, shown in FIG. Figure 5 can also be incorporated to isolate any part or section of exposed metallic material, thereby reducing heat loss (in less than desirable locations) of the tank A type of insulating material contemplated for use in the present invention is the polyisocyanurate foam, available from Dow Chemical Corporation, located in Midland, Michigan.

Advantageously, the use of closed cycle ventilation of the thermal line and the discharge system obviates the need to open the service register, particularly during discharge (which results in the release of heat). Moreover, the use of improved insulation materials reduces the solidification of the product during discharge. The thermal variations are also reduced, which increases the heat retention of the product.

Figure 6 is another side schematic view of a motor vehicle 90 having a trailer for transporting a viscous product 92 for unloading a viscous product, and connected to a motor vehicle 94, according to another aspect of the present invention . The trailer 92 again includes a tank having a cylindrical section 96 and a conical section 98 connected to the cylindrical section. The thermal lines 100 are schematically illustrated and run to the outlet vent and the vent valves, 102, 104, respectively. If the valves are hydraulic valves, the hydraulic lines 106 are shown on their way to the valves. The heat can be obtained from the motor vehicle or tractor 90.

And Figure 7 is an enlarged cross-sectional view of a trailer loading tank for transporting a viscous product 91, taken along line 7-7 of Figure 6. Here again, the tank includes a cover 108 and insulation 110. The structure of the tank and the insulation material provide several benefits, including those previously listed.

In the present invention, it has been found that the shape of the cover can contribute to the handling, and in particular to the discharge of the viscous product to reduce the product residue (i.e., product that remains behind or remains inside the product). the cover) that typically constitutes a waste. The conical section promotes the flow of the viscous product, and more specifically a liquid viscous product during its discharge, due to the gravitational forces. In addition, other forms of cargo tanks are contemplated and considered within the scope of the present invention.

For example, in one mode (although not shown), the tank includes a pair of conical sections, and can be referred to as a "double conical" tank. And in another embodiment (again not shown), the tank may comprise a straight cylindrical portion, and may be referred to as a "round" tank.

Figure 8 is an enlarged view of another embodiment of a trailer cargo tank for transporting a viscous product 120, similar to that previously described (e.g., Figures 1, 2 and 6), according to one aspect of the invention. present invention. Again, tank 120 is used for the storage, transport and discharge of viscous varieties of both food grade (eg, chocolate) and non-food grade (eg, paint); In the present embodiment, the cargo tank 120 is shown to include a heated cabin assembly 122 and a plurality of agitator assemblies 12. The agitator devices (in this vibratory cases) are placed along the tank cover to drive the output of the viscous product during discharge, thereby reducing the product residue. Because only one side of the trailer is shown, in the illustrated embodiment, the pairs of agitators are placed on the trailer, opposite each other. Stated another way, the pairs of agitator devices are placed along the tank cover, and more specifically along their base, longitudinally, opposite one another (another example of this type of arrangements are shown in Figure 5).

In a preferred embodiment, the agitator devices 124 vibrate for discrete and predetermined periods of time, and in a staggered manner (for example, a group or a pair of opposed agitators vibrate)., and then the next, and so on). Where several groups or pairs of agitators are used and placed inside the tank, the agitators may vibrate in a similar manner, for example from front to back, or from back to front. In general, it has been found that this discrete and stepped vibration encourages the flow of product and serves to improve or increase energy savings (when compared to the use of energy associated with continuous vibration). In one embodiment (not shown), three groups of agitators placed along the trailer in opposite manner can be used, with the agitation that takes place as follows: the more frontal agitators (for example, the agitators closest to the cabin) they vibrate first, later the central agitators vibrate, and finally the more posterior agitators vibrate, and with repeated staggered vibratory cycles until the discharge has been completed (or substantially completed). It has been contemplated that the predetermined "agitation" time period (e.g., vibration, momentum, etc.) can and should vary, at least in part, with the viscous product being transported, and in one embodiment, the The predetermined time period is approximately five (5) seconds. In addition, it is contemplated that they can be used additional agitators, and that the specific arrangement may vary based on predetermined criteria (for example, the type of viscous material being transported).

Figure 9 is a view of the upper part taken along the line 9-9 of Figure 8, which shows a portion of the cargo tank 120 having an example of heated fill air assembly, generally referred to by the numeral 130, according to an embodiment of the present invention. Often, the viscous product is a product (e.g., chocolate) that is transported and discharged at elevated temperatures to prevent solidification of the product and, in one embodiment, the internal walls of the tank are maintained at elevated temperatures (e.g. 48.88 degrees Celsius (120 degrees Fahrenheit)) in the manner described above. However, during the discharge, the replacement of air is allowed to ventilate the interior of the tank to prevent damage or collapse of the tank due to vacuum. It is desirable that such replacement air (or "fill air") be heated to maintain the temperature of the tank, which in turn serves to maintain the temperature of the viscous product contained within the tank.

Still referring to Figure 9, the heated fill air system 130 as shown, includes a hot cover 132, and this cover is connected to the tank 120, and in particular to the floor of the pouring dam 134 of the trailer. The system 130 further includes a heater device 136 (eg, a space heater or heater of a similar type), which is used to heat and pump the heated air inside the trailer to maintain a compatible and relatively constant temperature. A ventilation hole is located under the cover (and therefore is hidden from view) and can be limited to extract the heated air. In at least one embodiment, the heating device 136 can be connected to a power source external to the truck. The system may also include a thermometer (not shown) that can be used primarily for direct temperature verification. And in a preferred embodiment, the heated fill air system includes a heated stem valve (not shown) to allow the inflow of heated fill air into the tank.

In general, the heated fill air assembly 130 can be used to heat the exhausted air and provide or return the heated air to the tank containing the viscous product, to maintain the temperature of the tank, and consequently, of the product. In at least one embodiment, all or substantially all of the air entering the heated cabin assembly 122 can be heated.

Referring to Figures 8-9, tank 120 advantageously includes a gangway 138 connected to tank 120, and the structure of the gangway is capable of supporting one or more individuals / operators. The gangway 138 improves the overall safety for operators during, for example, loading and unloading the viscous product from the trailers and facilitates the observation of the flow of viscous product during loading and unloading, for example, as shown, by means of a service register 141 (Figure 9) located at the top of the tank 120. In addition, a control board (not shown) can be provided! What is in operative association with the trailer. The control board can be used to control various aspects of the trailer that are automated, for example, heating the viscous product.

Figure 10 is a rear view of the tank 120 taken along the line 10-10 of Figure 8, showing the assembly of the heated cabinet 140 according to one aspect of the present invention (with the door of the closed cover). Figure 11 is an enlarged, partially schematic view of the heated cabin assembly (with the cover door open), thus illustrating various system components during loading and unloading. Referring to Figures 10-11, in one embodiment, the heated cabinet assembly 140 includes a hydraulically actuated pump of the viscous product 142 that is used to drive a plunger (not shown), which in turn controls a throttle valve (It is not shown either). The valve is used to open or close a vent hole to allow air to enter (or prevent air from escaping) from tank 120 during loading / unloading of the product. The viscous product can be discharged, as shown, by means of a discharge hose 144. Several other devices and components can be placed inside the assembly of the booth 140. For example, a storage medium for the discharge hose 146 is also shown. It should be understood that the assembly of the heated cabinet 140 and its various components are illustrated by way of example and that alternative components and arrangements are possible and are considered within the scope of the present invention.

Several advantages may result from one or more of the modalities described and / or contemplated in the present. Using a trailer of the kind described above, and with the trailer used to transport a viscous chocolate material, the advantages and information listed below have been noted.

Residue of the product The product residue is substantially reduced. In an example, the. , '' '. • 'product residue was reduced by up to 50%, or even more. In a application, the product residue was reduced by approximately 136.07 Kilos (300 pounds) on a per load basis. Using 150 loads as an annual load figure, and with a cost per kilogram (pound) of transported chocolate of approximately $ 1.00 per kilogram (pound), the annualized savings can be projected up to approximately $ 45,000.

Furthermore, the reduced waste of the product results in loads with a reduced residue or excess waste for customers, as well as reduced administrative and processing time by the vendor associated with these loads. Costs for the carrier and / or customer can accrue, particularly when the waste constitutes more than 1% of a typical load (a frequent incident using the above solutions), as well as the associated loads (for example, loads to be used on a pallet of external washing).

Download time Loads with stopping times of a typical carrier are substantially reduced, for example, in the order of approximately 30%. This can also result in the extra benefit of the driver who spends less time in the trailer (for example, walking along the catwalk) Cleaning / Waste The cleaning time is reduced because there is less residue of the product. More specifically, the reduced product results in a waste material of the total reduced product. This in turn results in the driver or other personnel responsible for cleaning the tank (for example, scratching the inside the tank walls) after the discharge, spend less time cleaning the tank. As an example, with a product waste reduction of approximately 136.07 kilograms (300 pounds) of chocolate material, with an annualized figure of 150 loads, and with a waste disposal cost of $ 0.04 per kilogram (pound) of material, additional annualized cost savings of approximately $ 1, 800 can be expected due to the reduction of the material that must be available.

Moreover, it is typical that the "descaling" (cleaning) of the solidified chocolate tank from one charge to the next is required. Using the present invention, this "de-scaling" can be eliminated in about 10% of the overall loads (15 times a year), and thus, the costs associated with said work. (for example, cost of labor time and hot water or other cleaning solution) are eliminated. Additionally, improved product quality is associated with a reduction in cleanliness, as well as the overall design of the system (eg, tank design, heating system design, closed cycle system, etc.).

Driver's Stay It is expected that the driver's permanence will increase due to a variety of factors, including an improvement in job satisfaction due to the improvement in the characteristics of the tasks (for example, cleanliness) associated with the job. The costs associated with the driver's stay may be substantial. In one example, it has been found that it can cost as much as up to $ 7,000 to train a.u? new driver Energy saving It has been found that the present invention can result in a reduction of the fuel used during discharge. In one example, fuel savings of approximately 1.89 liters (0.5 gallons) per discharge were noted.

Productivity r? Using the present invention, additional loading opportunities can be carried out, resulting in increased productivity. It is anticipated that an increase of at least two additional loads may be made for a typical combination of tractor and trailer as a result of the present invention. This can result in increases in overall revenues. In one example, it was found that the increase was approximately $ 800 of revenue per load. Additionally, an increase in cost savings of approximately $ 200 per load has been determined. This serves to maximize the productive hours of service.

Efficiency I. Additionally, it has been determined that the overall efficiency associated with each load, and in particular with the loading / unloading of the trailer, increases when the present invention is practiced. Factors that affect efficiency include recruitment time, training time, rotation and errors during loading / unloading procedures.

The benefits mentioned above, which are thought to be substantial, should not be considered as limiting in any way. Instead, the above information is meant to be indicative of the potential benefits associated with the implementation and use of the present invention in the transportation, loading and unloading of the materials of a viscous product.

While the present invention has been described in terms of a preferred embodiment, it is recognized that equivalents, alternatives, and modifications, in addition to those expressly stated, are possible within the scope of the appended claims. For example, cargo tanks for viscous products can be newly installed or old cargo tanks readapted with the assemblies and apparatuses described herein.

Claims (25)

1. A trailer for viscous products comprising: a tank having a cover, the cover defines an interior for the transport and storage of a viscous product; and a first plurality of vibratory devices positioned along the deck to agitate the viscous product and propel the product from the interior of the cover during the unloading of the trailer, thereby reducing the amount of product remaining inside after the discharge.

2. The trailer for viscous products according to claim 1, characterized in that the viscous product is a liquid viscous product.

3. The trailer for viscous products according to claim 2, characterized in that the liquid viscous product is a food product.

4. The trailer for viscous products according to claim 2, characterized in that the liquid viscous product is a hazardous material.

5. The trailer for viscous products according to claim 1, characterized in that it also comprises a second variety of vibratory devices placed along the cover and opposite the first plurality of vibrating devices.

6. The trailer for viscous products according to claim 5, characterized in that the first and second pluralities of vibrating devices are staggered longitudinally with respect to each other.

7. The trailer for viscous products according to claim 1, characterized in that the heat is obtained from a motorized towing vehicle and circulated through the tank to heat the viscous product.

8. The trailer for viscous products according to claim 1, characterized in that it also comprises an apparatus intended for closed-cycle ventilation of the thermal line.

9. The trailer for viscous products according to claim 1, characterized in that it also comprises an insulation.

10. The trailer for viscous products according to claim 1, characterized in that the tank cover includes a substantially cylindrical portion and a substantially truncated straight circular cone portion, positioned substantially adjacent to the substantially cylindrical portion.

11. The trailer for viscous products according to claim 1, characterized in that the viscous product is chocolate.

12. The trailer for viscous products according to claim 1, characterized in that the viscous product is paint.

13. A trailer with tank for viscous products comprising: a tank that has a cover, the cover defines an interior for the transport, storage, loading and unloading of a viscous product; a first plurality of agitators placed along the cover to agitate the viscous product and propel the product from the interior of the cover during the unloading of the trailer, thereby reducing the amount of product residue; and a heated fill air system, operably associated with the tank cover, the system is used to heat the exhausted air and provide the heated air to the interior of the tank containing a viscous product, in order to maintain the temperature of the tank. viscous product.

14. The trailer according to claim 13, characterized in that during the discharge of the tank, the viscous product is agitated and in this way the product is driven from the inside of the cover, thereby reducing the amount of product remaining in the interior afterwards. of the download.

15. The trailer according to claim 13, characterized in that the viscous product is a food grade material.

16. The trailer according to claim 13, characterized in that the viscous product is a non-food grade material.

17. A method for unloading a viscous product from a tank trailer having an interior for storing the viscous product, the method comprises: stirring the viscous product to propel the product from the inside of the trailer, such that an amount of product remaining in the trailer. the interior after the discharge is reduced.

18. The method according to claim 17, further comprising heating the viscous product and wherein heating the viscous product is achieved using at least one cycle of a thermal line and a heated fill air system.

19. The method according to claim 18, characterized in that the heating is achieved using a heated infill air system that is operably associated with the tank cover, and the system is used to heat the exhausted air and provide the heated air inside the tank that contains a viscous product to maintain the temperature of the product.

20. A trailer system for viscous products for transporting, storing, loading and unloading a viscous product, the trailer comprises: a tank having a cover, the cover defines an interior for transport and storage of a viscous product, the tank cover includes a substantially cylindrical portion and a substantially truncated straight circular conical portion, positioned substantially adjacent to the substantially cylindrical portion; a first plurality of vibratory devices and a second plurality of vibratory devices, the first and second pluralities are positioned along the cover in opposite manner to vibrate the viscous product to thereby propel the product from the inside of the cover during discharge of the trailer, thus reducing the amount of product remaining in the interior after discharge; and a heated fill air system operably associated with the tank cover, the system is used to heat the exhausted air and to provide the heated exhausted air to the interior of the tank containing the viscous product, in order to maintain the temperature of the tank. product.

21. The system according to claim 20, characterized in that it also comprises a closed cycle ventilation system of the thermal line, to heat the viscous product.

22. The system according to claim 20, characterized in that the viscous product is a food grade material and a non-food grade material.

23. The system according to claim 20, characterized in that the viscous product is a liquid viscous product.

24. The trailer according to claim 1, characterized in that the cover includes a cylindrical portion.

25. The trailer according to claim 1, characterized in that the cover includes a pair of conical portions.