ES2227706T3 - PROCEDURE AND APPLICATOR OF A HOT BASED MIXTURE WITH HOSE AND DISPENSING UNIT HEATED. - Google Patents

Abstract

A heating system for a hot melt mix applicator hose (22) and dispenser wand (24) comprises a three phase heating element (30) powered by a generator (166) that is a vehicle alternator (194) driven by an internal combustion engine (52) to heat the hose (22), wand (24), and hot mix material within. A controller (46) communicates with a temperature sensor (122) carried by the hose (22) to selectively energize the generator (166) to provide current to the heating element (30) to maintain the desired hot mix material temperature. The heating element comprises three phase heating element wiring (98, 100, 102) wrapped around the hose (22) and wand (24).

Description

Procedure and applicator of a molten mixture hot with heated hose and dispensing unit.

The present invention relates to an applicator of a hot molten mixture to dispense material that can flow heated, of the type described in the preamble of the claim 1.

An applicator of this type is described in the US-A-4,096,973. He known applicator includes a flexible hose for delivery of a material that can flow from a source to the location of application. The flexible hose includes a heating element formed as a heating coil surrounding the length of the hose. As can be seen in the figures, the winding heater is arranged on the outer surface of the hose. This arrangement of the heating coil can prevent that the heating elements are curved at an angle of curvature too small during the movement of the hose; but nevertheless, on the other hand, the heating element is subject to wear, for example, when the hose is lying on the floor.

The applicators of a hot molten mixture are use to apply hot molten mixture in the form of asphalt or a hot molten bituminous material on surfaces, such as for example paved roads and the like to seal, fix patches or repair roads. These types of applicators are also used to apply molten material hot to hold pavement markers in position lowered or raised and to seal and protect traffic ties inductive.

Therefore, in one of said applicators of hot melt mixes with commercial success to date, marketed by the assignee of this application and disclosed in U.S. Pat. number 4. 692.028, the applicator has a tank to heat and store the hot molten mixture that it is pumped by a pump through a hose and over the pavement. During periods of operation in which the operator does not you want to apply the mixture, but you want the mixture to remain as hot enough to be applied when needed, it Insert the dispensing unit into a sleeve connected to the tank. With the dispensing unit in the sheath, the pump circulates continuously mixing through hose, unit dispenser, cover and back inside the tank, so that will not harden in the dispensing unit or hose to obstruct the flow.

When you have finished using the applicator, the pump is operated in reverse briefly to clean the hose and The hot melt mixing material dispensing unit before the hot molten mixture can cool. Unfortunately, on the assumption that the hot melt mix hardens inside the hose or dispensing unit, you can partially block or completely block the flow through the hose, implying that the operator has to clean the hose and dispensing unit before the applicator can be used again to apply the hot melt mixture.

To improve this procedure and avoid clogging of the hose and dispensing unit, it has used a single phase electric heating system to prevent that the molten mixture material solidify in the hose and in the dispensing unit. In operation, a temperature sensor in the dispensing unit or hose communicates the temperature to a controller that regulates the application of heat of an element system heater that is in contact with the hose and the dispensing unit, regulating the electric current applied to the element.

In the construction of the heating element, a single heating element conductor and a neutral conductor not heater produce a cord of the heating element of two conductors that is wrapped around the hose and the unit dispenser in the form of a spiral or propeller. Unfortunately, a quite dangerous electrical potential of at least 110 volts ac approximately applied to the heating element during operation to heat the hose and the dispensing unit. How result, there is a high risk of electric shock in case drivers are exposed or insufficiently insulated by any other way during the operation.

Additionally, since only one driver of the pair of coiled heating element cord conductors around the hose can generate and transmit heat, the cord must be wrapped relatively tightly around of the hose and the dispensing unit with a minimum of space between windings to provide proper heat flow and prevent the hot molten mixture from solidifying. Unfortunately, since only one driver of the two heating element cord conductors can generate heat and since both cord conductors lean against the hose and the dispensing unit, the amount of driver heating element per unit length of the cord is not maximized, leading to an inefficient operation of the element heater.

In addition, for particularly long lengths of the hose, such as hoses that have approximately 3.6 meters in length or more, more than one temperature sensor is must be used in a single-phase heating system to provide adequate temperature regulation, so that the hose and the dispensing unit are properly heated during operation This additional sensor increased in shape inconvenient cost and potential system maintenance heater, while also increasing complexity and difficulty of properly heating both the dispensing unit like the hose to keep them at a temperature that can ensure a good flow of the hot molten mixture through the hose and dispensing unit.

During the control of the heating element, the temperature controller simply regulates the flow of current from a single phase alternator to the heating element connecting and disconnecting the current. To determine when the current flow must be supplied, the controller has a selectively adjustable thermostat that will communicate with the sensor temperature. If the temperature detected is too high, the thermostat causes the controller to cut off the flow of the current to the heating element. If the temperature detected is too low, the thermostat will induce the controller to connect the current flow of the heating element.

To control the single phase current flow, the controller is connected in series with the heating element and it works simply as an on / off switch on response to a temperature sensor input in communication with the hose or dispensing unit. The controller does not control alternator or engine operation. It just works as a switch to connect and disconnect power to the heating element.

The alternator is a conventional alternator and is connected by pulleys and belts to a drive shaft of a motor internal combustion to supply the electric current, the alternator has an integral power regulation circuit to convert your initial three-phase lower voltage input into a single phase ac alternating current that has voltages regulated at least 110 volts, approximately. Unfortunately, this power regulation circuit adds costs to the system without adding any advantage in its use or operation.

What is needed is a heating system of the most efficient and economical hose and dispensing unit that operates more safely at low voltages while providing a adequate heat to keep the molten mixture warm inside the hose and dispensing unit in a state that can flow. An applicator of the hot melt mixture of a relatively compact and mobile construction that has a heated hose and dispensing unit to maximize the convenience and applicator performance. These needs are solved by the applicator of claim 1.

The applicator hose of the present invention comprises a conduit having a flexible tube Compression resistant received in telescoped form and sliding inside the duct that limits the amount of curvature which can support the duct to prevent the formation of cocas while also resisting duct crushing. A heating element is wrapped around the duct to heat the material that can flow heated inside the tube. He duct is enclosed by an outer protective shell telescoped on the duct. Between the ends of the tube and the duct, a little tight and sliding fit allows the tube move relative to the duct during curvature to facilitate the curvature of the tube and conduit substantially at Same time.

A heating system is supplied for a hose and dispensing unit of an applicator of a mixture hot melted for use with an electric heating element three phase energized by a selectively energized generator to heat the hose and the dispensing unit and maintain the hot molten mixed material inside the hose and unit dispenser in a state that can flow. To energize selectively the generator to control the heat input to the hose and dispensing unit, the heating system has (1) a temperature controller in communication with a sensor of the temperature carried by the hose or dispensing unit, and (2) a control output in communication with a generator input. The generator control input allows operation control of the generator by the temperature controller to control the current flow to the heating element, controlling said It forms the heating of the hose and the dispensing unit.

The hot melt mix applicator has a source of hot molten mixing material that preferably it is contained in a boiler. The boiler preferably it is in a vertical position, of a construction generically cylindrical and preferably of a construction of double heater with an envelope between the inner walls and external to receive hot oil inside and heat the Hot molten mixture inside the inner wall of the boiler. To allow hot melt mix material to be pumped from the boiler when heated to a state that can flow, the applicator has a pump with an outlet received in the boiler and an outlet connected to the hose.

In a preferred embodiment of the applicator, the boiler has a pump for the mixing material hot melt located between a pair of stirrers inside the boiler to rotate the hot molten mix material inside of the boiler during operation. Preferably, the pump of the hot melt mixing material is a driven pump hydraulically coupled to a hydraulic fluid pump that is connected to a drive shaft of an element to move an actuator main which is preferably a combustion engine internal

An output shaft of the motor is also coupled to an electric power generator that preferably generates three phase electric power. Preferably, the generator is a conventional vehicle alternator modified so that no require no rectifier, voltage regulator, voltage regulator current or any other power regulation circuit electric on board the alternator and that you can supply directly three-phase electrical power to the heating element three phase electric.

The generator has a stator with three outputs that connect to the hose and the dispensing unit of the element heater and a rotor that has a control input so that the generator can be selectively energized to control the heating of the hose and the dispensing unit. The entrance of control is connected to a controller control output that emits a control current to activate the rotor when the hose temperature with the dispensing unit drops by below a preselected temperature.

In a preferred embodiment, the controller has its own power source that preferably it is a direct current power source that preferably It is a battery. To detect the temperature of the hose or the dispensing unit, the controller has a pair of inputs connected to the temperature sensor conductors that are attached to the hose or dispensing unit. Preferably The temperature sensor is an RTD thermocouple to detect the temperature of the hose or the dispensing unit. Preferably, the temperature sensor is fixed to the hose next to the end of the hose boiler. Preferably, the sensor is fixed to the hose at approximately 15.24 centimeters from the end of the hose boiler.

To prevent molten mixing material hot solidify inside the hose and unit dispenser, the three-phase heating element is in communication with the hose and the dispensing unit. Heating element It comprises three conductors of the heating element, carrying each conductor a phase of three-phase electric current from the generator. The heating element conductors are received in an insulating material that separates each conductor from each other forming A cord. The cord of the heating element is wound in a spiral or helical configuration around the wall of the hose and dispensing unit. At one end of the cord heating element each of the conductors of the cord of the heating element is connected to an output terminal of the generator at the other end of the heating element cord, The ends of each conductor are connected to each other. Every conductor generates heat when current is applied, having the heating element cord non-heating conductors or neutral conductors in contact with the hose and the unit dispenser where the heating element is wrapped around of the hose and the dispensing unit.

Preferably, each spiral or curl of the heating element cord is separated approximately 1,905 cm of spirals or adjacent curls to produce a heating flow of at least about 0.3875 W per cm2 and preferably produces an optimal heating flow of approximately 0.5425 W per cm2 when a combination Three-phase current and voltage preference is passed through of each conductor of the heating element. Alternatively, adjacent cord curls may be separated between about 1.27 and about 2.54 cm while producing still a sufficient heat flux density to achieve proper heating of the hose and unit dispenser

Preferably, the cord is wound relatively tight shape around the hose and unit dispenser, so that it leans against the hose and the unit dispenser to maximize heat transfer from each of the conductors of the heating element towards the material of hot molten mixture inside the hose and unit dispenser Preferably, the cord is fixed directly to the hose and the dispensing unit, such as by means of a glue tape that may be a silicone tape similar to a insulating tape.

The cord of the hose heating element is connected in series with the cord of the heating element of the dispensing unit To accommodate the hose being connected to the dispensing unit, the cord of the heating element of the hose has a non-heating part that is connected by an electrical connector to the non-heating part of the cord of the heating element of the dispensing unit, connecting said form both cords in series. The connector allows the hose with the dispensing unit they can be exchanged quickly with another hose or dispensing unit if necessary. Preferably, the cord also has a non-heating part connected by said connector to a power cord of the applicator next to the boiler.

The heating element conductor is constructed of a resistance type heating conductor, as per example copper conductor, conductor of a copper alloy, Nichrome, an alloy of iron-nicromo-aluminum, or other type cord capable of generating heat relatively efficiently after the passage of current through the conductor. Each of the non-heating parts of the cord is preferably constructed copper conductor having a thickness of preferably at minus a fourteen caliber.

In a preferred construction, the hose it comprises an internal wall formed of a resistant material and resilient, such as a steel braided hose stainless, duct-shaped through which the material passes hot melt mixture during operation. Inner wall it has a silicone layer that is preferably a tape of silicone. Coating this silicone layer there is a cord 3-phase heating element that is rolled in the form of helical spiral around the silicone layer and the wall of internal hose Wrapped around the cord is another layer of silicone which is preferably silicone tape. On his part outside, the hose has an outer rubber cover resilient and flexible, durable and resistant lining the layer of insulation which preferably may be an insulating foam of closed or open cell. The temperature sensor is preferably received in a hollow in the insulator and pressed against the wall of the inner hose using a rolled tape around the hose. On each end of the hose is a threaded connection element to allow the hose to tightly connect to fluids at one end to boiler and at the other end to the dispensing unit. Unit dispenser has a gun type dispenser adjacent to its hose connection. Spread out from the gun dispenser is a generically cylindrical hollow body generically rigid forming a flow tube of the mixture hot melt through which molten mix material Hot flows during operation. The cord of the element heater is rolled in a spiral configuration or helical preferably around the surface radially External hot melt mix flow tube for maximize heat transfer from the cord, through the tube and hot molten mixture in the dispensing unit. Preferably, the cord is secured against the tube by a tape wrapped around the cord and tube or by any another way.

To prevent a user from burning during operation, the dispensing unit has a support tube and external diameter of a larger diameter generally telescoped axial on the flow tube of the hot molten mixture. For prevent heat loss and burn the user, the insulator may be received in an envelope between the surface radially external flow tube of hot molten mixture and the radially internal surface of the support tube. For separating the tubes from each other there is preferably a hood in the end of the hot melt mixture flow tube. For prevent the dispensing unit from leaking during operation, the nozzle at the free end of the dispensing unit preferably it has a duckbill type valve.

The temperature controller has a circuit type programmable thermostat that is in control with an input of external control temperature that can be selected by the user of the hot melt mix applicator. Preferably, the external control temperature input is a knob fixed to an axis of a variable control mechanism, such as for example a variable resistor, a variable capacitor, a potentiometer, or any other variable control mechanism appropriate, which may be analog or digital.

During operation, the material temperature Hot mix in the hose is detected by the controller and compared to the control temperature to determine if it energizes the generator to supply current to the heating element to heat the hose and the dispensing unit. If the temperature of the hot melt mixture detected is above a threshold appropriate above the control temperature, the controller does not energizes the generator and no heat will be applied to the hose and the dispensing unit Yes, however, the temperature of the mixture hot melt is lower than the control temperature or by below a threshold below the control temperature, the controller energizes the generator, originating said form that the heating element hot hose and dispensing unit. To energize the generator, the controller sends a current of control from its exit to the generator rotor inlet.

In a preceding embodiment of the hose heating system and dispensing unit, the controller has a lower set point of the indexed control temperature for temperature control preselected by the user which may be, for example, 5 degrees, 10 degrees, 15 degrees or any other default increment below the set control temperature. In variant, the lower set point of the control temperature It may be the same as the control temperature set by the user to determine when the generator should be energized, the controller has a higher establishments point of the control temperature that is indexed to the control temperature and that can be a default value, for example 5 degrees, 10 degrees, 15 degrees or other quantity greater than the temperature of control.

In another preferred embodiment of the controller, the controller may be built and arranged to control engine operation and selectively regulate the output generator power to control the heating of the hose and dispensing unit by heating element. He controller has an output in communication with a controller of the motor that preferably can vary controllable the motor speed to control the power output of the generator preferably, the motor controller is a solenoid coupled to the engine choke.

In a preferred engine control regime, the controller detects voltage, current or power supplied by the generator to the heating element and adjusts the motor speed appropriately. In another control regime preferably, the controller adjusts the motor speed according to the temperature of the hot molten mixing material inside the hose or dispensing unit.

In another additional control regime, the controller energizes the generator based on the temperature of the hot molten mixture detected by the temperature sensor and controls the engine speed while the generator is energized The generator is selectively energized preferred based on the temperature detected and / or the load electric heating element.

In a heated hose construction preceding and novel, the hose comprises a duct lined with tetrafluoroethylene (TEFLON) fabric or mesh that has a tube flexible resistant to understanding received telescoped inside the duct The conduit is fixed at each end to a connection element, which is preferably a connection element  transitional, and that is enclosed by a protective cover external telescoped on the duct that preferably comprises a rubber hose that has an internal wire, relatively rigid embedded in its side that serves to resist the curvature, crushing and twisting. The wire preferably comprises a helical wire inside the wall side of the cover that forms a reinforcement of the side wall similar to bellows, crush resistant.

The tube is composed of a thin strip elongated and continuous of a metal that is preferably aluminum and It is helically wound with its edges hooked to form a generically cylindrical tube that can be curved and that it is compressed axially while also supplying the duct with increased resistance to crushing. For put the tube in the duct, the tube is inserted so telescoping slide inside the duct, so that it is at less slightly compressed axially inside the duct to allow curvature while limiting the amount that the duct can bend, thereby preventing the formation of cocas When received in the duct, the tube is removable from sliding shape relative to the duct to help accommodate the duct curvature.

The cover extends over the entire length of the hose and is fixed to the connection assembly at each end of the hose by a collar that clings to the cover tightly around the connection assembly. Through this construction, the cover transmits voltage to the hose, originated during the traction of it, from a end of the hose to the other end of the hose at move it away from the duct, minimizing tension transmitted to it through the most fragile duct.

Each connection set comprises preferably an oscillating connection element and an element of transition connection Each collar preferably crimps the cover tightly around a housing of one of the oscillating connection elements. Each connection element swing is at least partially received inside the cover to isolate it. Each transition connection element is completely received inside the cover, isolating it from said shape. Preferably, there is a space inside the hose air between the cover and the duct that insulates the duct.

In oscillating connection element has a part threaded female which is threaded to the male threaded part of the transition connection element. The other end of the element oscillating has a male threaded part can oscillate relative to the housing to allow the hose to rotate relative to the same and is set to prevent the twisting of the hose.

The collar is elongated and cylindrical and covers a hole in the cover through which the element's laces heater enter the hose to prevent bending of the cover break the cover in the hole. The necklace also has a generically coaxial hole with the cover hole that allows the cords of the heating element to pass to its through.

Other advantages are supplied by the system heater of the dispensing unit and the applicator hose of the hot molten mixture and a heat control procedure applied to the hose and dispensing unit of an applicator of the hot molten mixture that more efficiently heat the hose and dispensing unit using an electric current three phase; simplifies and decreases costs and increases reliability when using a three-phase generator that comes from a alternator of a commercial vehicle that advantageously does not require a rectifier or regulator; maximizes heat transfer and get a more uniform heat flow when using an element 3-phase heater that does not require a neutral return conductor no heater; minimize engine load and better control the heating of the hose and the dispensing unit when energizing selectively the generator when only current is needed electric; operates safely at a lower voltage; and it is a system hose heater and dispensing unit that has a number minimum of components, it is consistent, simple, flexible, reliable and durable and economical to manufacture and that is easy to assemble and simple to use, and a hose to transport heated material that can flow that is flexible but offers resistance Improved coconut formation, it is highly resistant to crushing and twisting resistant and is a hose that minimize the tension applied to your flexible internal conduit to avoid failures in the duct and let the duct loose by traction by one or both of its connecting elements, and is a hose that is durable, tough, simple and quick to assemble, Reliable, easy to use and economical to manufacture.

The aforementioned objects, as well as other objects, features and advantages of the present invention will become more patents after the following detailed description of the best embodiment, attached claims and drawings Attachments, in which:

Figure 1 is a perspective view of a hot melt mix applicator that has a system of heating control of the hose and dispensing unit The present invention.

Figure 2 is a side view of the applicator

Figure 3 is a top view of the applicator

Figure 4 is a partially side view fragmentary of an applicator hose cut to show the 3-phase heating element and temperature sensor.

Figure 4A is a cross-sectional view. of the hose taken along line 4A-4A of figure 4.

Figure 4B is a cross-sectional view. of the three-phase heating element cord taken along line 4B-4B of figure 4.

Figure 5 is a side view of a unit applicator dispenser partially cut to show the 3-phase heating element.

Figure 6 is a schematic view of the element heater and control circuit to control the application from the current to the heating element of the hose and unit dispenser

Figure 7 is a perspective view partially fragmentary of an internal combustion engine of the applicator coupled to the generator to supply electrical power to the heating element.

Figure 8 is an enlarged front view of size of a control housing to accommodate a controller temperature of the heating element and the control circuit.

Figure 9 is a block diagram that represents a second control system of the present invention to regulate the heat input to the hose and unit dispenser to regulate engine speed, regulating said It forms the generator output.

Figure 10 is a fragmentary side view of a prior art hose construction cut to show the novel heating element internally wound around an internal duct through which the liquid flows heated.

Figure 11 is a cross-sectional view. of the hose taken along line 10-10 of figure 10.

Figure 12 is a longitudinal sectional view. of the hose shown in figure 10.

Figure 13 is a distal view of the hose shown in figure 10.

Figure 14 is a perspective view of a threaded distal hose connection element shown in the figure 10.

Figure 15 is a sectional side view of a Novel heated hose construction.

Figure 16 in a sectional view of the hose taken along line 16-16 of the figure 15.

Figure 17 is a perspective view of the hose connection element shown in figure 15.

Figure 18 is a perspective view of a tilting hose connection element shown in the figure 15.

introduction

Figure 1 illustrates an applicator 20 of the mixture heated cast using a heated hose 22 and a heated dispensing unit 24 of the present invention for controllable material 26 that can flow heated (in dashed lines) which is preferably a hot molten material or a mixture, such as bitumen, Pitch, asphalt, a mixture of asphalt, a resin, a thermoplastic or any other material capable of flowing after heating to a desired temperature. To heat more effectively the hose 22 and the dispensing unit 24 while minimizes the risk and danger of electric shock to a user 28 (in dashed lines) of the applicator 20, a three-phase current of a relatively low voltage is applied to a heating element 30 (figures 4 and 5) in contact with hose 22 and unit dispenser 24.

II. Hot Melt Mix Applicator

In the form shown in the figures 1-3, the applicator 20 of the hot molten mixture it has a support frame 32 with a cradle assembly 34 of vehicle at one end and is supported on a pair of wheels 36 adjacent to its other end. Supported in frame 32 is a source of material that can flow heated which is preferably a mixture of a hot molten material contained in a boiler 38 heated.

Boiler 38 has a bottom wall, a side wall 40 generically cylindrical, a top wall 42 and it is preferably located vertically in the manner shown in figures 1-3. Fixed by hinge to upper wall 42 is a hatch cover 44 that can be open to lay one or more solid bricks (not shown) of the hot molten mixture inside the boiler 38. Preferably, the boiler 38 is of a double construction heater that has an inner wall separated from the side wall exterior that creates a cover between them in which oil circulates heat during operation to heat the molten mixture heat inside boiler 38 to, or above, a temperature at which it becomes fluid. Preferably, the boiler may be constructed and arranged substantially according to the container for generally cylindrical sealant molten material disclosed in U.S. Pat. No. 4,159,877, whose content is expressly incorporates herein.

To heat oil and mixing material hot melt, one or more heating coils are preferably immersed in oil. To heat directly hot melt mixing material, heating coils may be located inside the inner wall of the boiler 38 in direct contact with the hot molten mixture inside the boiler 38. Alternatively, a gas burner (not shown) at the bottom of the boiler 38 and which is coupled to a Gaseous fuel supply may be used to heat the oil and, in turn, heat the molten mixture material hot.

To selectively control the temperature of the oil heated regularly, the material temperature of hot molten mixture inside the boiler 38, the applicator 20 has a temperature controller 46 in communication with (1) a oil immersed temperature sensor to detect directly the oil temperature and (2) a sensor temperature in contact with the hot molten mixture inside the boiler 38. As shown in Figure 1, the controller temperature 46 of the hot molten mixture is preferably built and arranged so that it has a screen to display oil temperature, a button below the screen to select the desired hot oil temperature, another display to display the temperature of molten mix material heat inside boiler 38 and a button below to select the desired hot melt mixture temperature.

During the initial operation, the material of the hot molten mixture inside boiler 38 is heated to a temperature between approximately 176.67 and approximately 204.4 ° C, so that it can be in a state that It can flow or even liquid. However, depending on the type and nature of the material inside the boiler 38 to be heated and apply, the temperature of the hot melt mix material It may be greater or less than the mentioned interval.

When the hot molten mixture is heated to a temperature at, or above, which becomes fluid, and can be pumped, or even liquefied, the molten mixture hot inside the boiler 38 is preferably stirred by a set 48 of agitator and pump. Preferably, the set 48 of agitator and pump has at least one agitator inside the boiler 38 to stir the hot molten mixture and help keep it at a more uniform temperature throughout the boiler 38. Additionally, each agitator also helps to maintain solid products, such as fibers, granules or others particles suspended in the mixture while it is heated and the state that can flow.

The agitator and pump assembly 48 includes also a pump (not shown) that has an outlet in communication with the hot molten mixture inside the boiler 38 and an outlet in communication with the hose 22 to pump the hot molten mixing material inside the boiler 38 up to hose 22 and dispensing unit 24 to be dispensed from the dispensing unit 24. The pump for the molten mixture hot is preferably a hydraulically operated pump that preferably it is of a rotor construction or gear-rotor to supply mixing material hot melt from inside boiler 38 to hose 22 and dispensing unit 24. To control the operation of the stirrers and the pump for the hot molten mixture, there is preferably a control panel 49 supported by the boiler 38.

In a preferred embodiment of the 20 hot melt mix applicator, the pump for mixing hot melt is placed inside boiler 38 between a pair of separate stirrers in the boiler 38 to allow the solid products, such as fibers and the like, remain suspended in heated hot melt mix material inside the boiler 38. Preferably, the agitator assembly 48 and pump for hot melt mixture is built and arranged substantially according to the agitator and pump assembly disclosed in U.S. Patent No. 4,859,073, whose content is incorporated expressly herein.

To supply power to operate the pump for the hot melt mixture, the applicator 20 has a main actuator 50, which is preferably a motor 52 of internal combustion, such as a diesel engine. Alternatively, the main actuator 50 may be a motor of gasoline, an electric motor, a hydraulic actuator, a pneumatic actuator or any other type of power source. In the form shown in Figure 1, operatively connected to the motor 52 is a hydraulic fluid pump 54 that has a line of socket 56 and a return line 58 in communication with a tank  60 hydraulic fluid. To supply fuel for the motor operation 52, the applicator 20 has a reservoir of fuel 62 disposed in the support frame 32.

During operation, motor 52 supplies power to the hydraulic fluid pump 54 that supplies fluid hydraulic under pressure to the pump for hot melt mixture and make the hot molten mix material that can flow can be pumped from boiler 38 to hose 22 and unit dispenser 24. To cool the engine 52 during operation, the engine 52 has a radiator 64 to cool the hydraulic fluid during pump operation, motor 52 has preferably also a hydraulic fluid radiator 66.

To control the application of the molten mixture hot pumped from the boiler 38 to the dispensing unit 24 and dispensed from the dispensing unit 24, the unit dispenser has a gun type 68 dispenser element in a extreme. To selectively dispense hot melt mixture from the dispensing unit 24, the dispensing gun 68 has a  trigger 70.

In a preferred embodiment of the hot melt mix applicator 20, trigger 70 communicates directly with the pump for hot melt mixture to control pump operation and regulate relatively requires the flow of hot molten mixing material from the dispensing unit 24. Preferably, when the trigger 70 is pressed, turn on the hot melt mixture pump causing the hot melt mixture material to be dispensed from the dispensing unit 24. When released, the trigger 70 disconnects the pump, stopping the flow to the unit dispenser 24, thereby regulating the flow of the mixture hot melt through dispensing unit 24 and the hose 22. Preferably, the control apparatus for dispensing selectively the material of the hot molten mixture may be constructed and arranged substantially in this way according to the flow control apparatus of the molten mixture disclosed in the U.S. patent No. 4,692,028, whose content is incorporated expressly herein.

To minimize and substantially prevent from preferably the hot molten mixture drips from the end of the dispensing unit 24, the end of the unit dispenser 24 preferably has a spike type 72 valve of flexible and resilient duck (figures 1 and 5), which may be of one disposable construction In a variant embodiment, during operation, the pump for hot molten mixture can operate continuously to supply the molten mixture heat under pressure to a dispensing unit 24 that has a dispensing element with a conventional valve that can be selectively open to dispense molten mix material heat from the dispensing unit 24 and closed to stop the dispensing of hot molten mixing material.

III. Hose and unit construction dispenser A. Hose construction

In the form shown in Figures 1 to 3, the hose 22 is received in a cradle 74 supported by an arm 76 tilting and pivoting which is attached to the boiler 38 to allow that a user 28 of the applicator 20 of the hot molten mixture Quickly and easily maneuver hose 22 and unit 24 dispenser during operation. The hose 22 is of flexible and resilient construction and is connected to an element connection extended out from boiler 38 in a end and to the dispensing gun 68 of the dispensing unit 24 at its other end.

In the form shown in Figures 4 and 4A, the hose 22 is elongated, generically cylindrical and flexible for allow the dispensing unit 24 to move easily and positioned to allow a user 28 to accurately dispense the material 26 of the hot molten mixture in one location desired on the floor or pavement. At one end 104 of the hose 22 shown in Figure 4, the hose 22 has an element of threaded connection 80 to be sealed together to an element of complementary threaded connection (not shown) of the boiler 38. At its other end 106, the hose 22 has another element of threaded connection 81 to be jointly sealed to a complementary threaded connection element 110 (figure 5) of the dispensing unit 24.

The hose 22 has a hollow conduit 82 defined by an internal wall 84 of cross section generically circular which is preferably constructed of braided stainless steel wire through which the material of the hot molten mixture can flow once it has been heated to, or above, its temperature at which it can flow. Wrapped around the outside of the wall 84 inside the hose is a layer of silicone 86 that is preferably formed of a silicone tape. To maximize the heat transfer from heating element 30 to material of the hot molten mixture inside the hose duct 82, the heating element 30 is spirally wound or in a generically helical arrangement around winding 86 silicone and inner wall 84 of hose 22. To serve of help to the electrical isolation or of any other form, the heating element 30 has another winding 88 of a insulating material which is preferably also a tape of silicone. To permanently and electrically insulate the wall 84 internal hose and heating element 30, the second silicone curl 88 is preferably covered by a thick layer of an insulating material 90 which is preferably example, an open or closed cell insulating foam. For Supply a resilient and durable exterior, the foam layer insulator 90 is covered by an outer layer of a material 92 flexible, resilient and durable which is preferably a rubber which is capable of providing thermal insulating properties and electric. Advantageously, the construction and arrangement of the various layers that form the hose 22 allow the hose 22 transport the hot melt mixture material to a temperature in excess of 148.9 ° C without burning or suffering a electric shock the user 28.

The hose 22 is shown in more detail in the Figures 10 to 14. Flow pressure resistance is supplied of the fluid inside the conduit 82 by a cylindrical layer 240 of braided stainless steel or fabric that makes contact and surrounds the duct wall 84. The wall of the conduit 84 is constructed of, or conformed with, tetrafluoroethylene (TEFLON) that is put into direct contact with the hot molten mixture flowing during The operation of the applicator. A layer of silicone 86 surrounds and makes contact with layer 240 of braided stainless steel. An element Novel heater 30 is spirally wound around the silicone layer 86 and extends substantially throughout the hose length 22. A layer of silicone tape 86 is wrapped around heating element 30 to retain it in position. If desired, the rubber foam layer 90 may retain the heating element 30 against silicone layer 86 without the use of tape.

Although only one end of the hose 22 in figures 10 and 12, both ends of the hose 22 are locked in a 242 metal necklace generically cylindrical that fits around the outer rubber cover 92 protective Necklace 242 is approximately 7.9375 cm axial length and has a clamp 244 that projects partially outward from collar 242 that hugs around connection element 80 at the other end of the hose 22. Collar 242 is continuous, cylindrical and preferably made of steel and has no holes or holes in the same.

Although deck 92 is constructed of rubber, It has no internal reinforcement that can tend to resist the twisting or crushing of the roof 92. Also, no there is voltage during operation since it is not fixed immobile form to any other part of hose 22 and is not fixed immovably to conduit 82 as well as to any connection element. Simply cover and enclose the foam of rubber 90 surrounding the conduit 82.

The wiring 30 of the heating element, as well as the wiring leading to the temperature sensor 122 (figure 4), enters hose 22 between collar 242 and cover 92 of external rubber Although not shown in the figures, the cover of rubber 92 has a groove or opening adjacent to the element of connection 80, covered by collar 242, allowing wiring 30 be inserted beyond radially inside inside the hose 22 and wrapped around silicone 86 that encloses the duct 82. Although not shown in the figures, a tape flexible high temperature is preferably rolled around the outside of the rubber cover 92 below the necklace 242.

With reference to figure 14, the element of connection 80 is a transition connection element 80 for pipes which has a male threaded connection element 246 at one end extending outwardly from hose 22 for connection to a female connection element (not shown) of the unit dispenser 24 or boiler 38. At its other end, the element of transition connection 80 has a connection element 248 of insert built and arranged to be inserted into a duct end 82. Normally, the connecting element female (not shown) of the dispensing unit 24 or boiler 38 it is part of an oscillating element that is located outside the hose 22, between the connecting element 80 and the unit dispenser 24 and connection element 81 and boiler 38, allowing hose 22 to rotate relative to the unit dispenser 24 and / or boiler 38 during operation. Between threaded connection element 246 and the connection element of insert 248 is a square or hexagonal nut 250 which can be grabbed by a spanner or other tool to serve as helps to thread the threaded end 246 into an element of female connection (not shown) or vice versa. The element of connection 80 is normally made of steel, bronze, copper or aluminum.

With further reference to Figure 12, the insert connection element 248 preferably is a stud 252 which has 254 flanges or nails extended out radially and generically coaxial, which each engages in the inner wall 84 of conduit 82 when inserted into the conduit 82 to resist and preferably prevent the removal of the connection element 248 of conduit 82. When inserted inside of conduit 82, insert connection element 254 is sized to provide a relatively friction fit airtight between it and the duct 82 to prevent its removal. To further prevent its withdrawal, a band, strip or splint of  metal (not shown) is tight or tightly embedded around the outside of the wall 86 of the conduit 84 to press the wall 86 and put it in tight connection with the element of connection 248 and its nails 254.

With reference to figure 13, clamp 244 of collar 242 is held around hexagonal nut 250 of the connecting element 80, still ensuring the connecting element 80. The nut 250 of the connecting element 80 is caught between a pair of curved grip plates 256 and 258 which grip the connection element relatively rigidly 80 to collar 242. Although not clearly shown in Figure 13, a 256 grip plate is completely detachable from collar 242 and, as shown more clearly in Figure 10, it has a pair of through holes 243 separated. The 243 drills are coaxial with the threaded holes 245 on the other grip plate 258. The plate of grip 258 is welded to collar 242 to fix it rigidly to the necklace 242.

With the connection element 80 received between the grab plates 256 and 258, so that the threaded ends 246 extend outward from the end of collar 242, a 260 round head screw or bolt inserted through each hole 243 on the inseparable grip plate 256 is threaded inside the coaxial threaded hole 245 with the grip plate of the collar 258. With 260 bolts inserted and tightened, the plates 256 and 258 are held tightly against the corners of the hexagonal nut 250 of connection element 80, ensuring rigidly the collar 242 to the connecting element 80.

With reference to figure 12, although the necklace 242 fits around the hard 92 non-fitted rubber cover by friction tightly around cover 92 and is assembled to connection element 80, so that when 260 bolts are removed, collar 242 can be slipped off the deck 92 with relative ease and with relatively little effort. Collar 242 works only to minimize the hose flexion 22 near connection element 80 during operation As a result, necklace 242 does not fit immobile form cover 92 to any connecting element of the hose 22 and of course not to connection element 80.

To avoid additional bending and curvature of the hose 22 next to the connecting element 80, approximately a 0.30 meter section of the hose cylindrical marine evacuation 262 of a diameter of 5.08 cm fits  relatively tight form by friction on collar 242 or is fixed to collar 242, in the form shown in figures 10 to 12. Marine evacuation hose section 262 is constructed of a thermoforming material, usually rubber, which it has a 264 helical metal reinforcement wire (figure 11) inside its side wall 266. The hose section 262 of marine evacuation does not extend for the total length of the hose 22.

Although the construction of hose 22 represented in figures 10 to 14 has enjoyed success Substantial commercial, certain improvements are desirable. For example, when the hose 22 is pulled, the tension is transmitted by the  total length of hose 22 from a connection element 80 or 81 through conduit 82 and mesh wall 240 surrounding the conduit 82 of the other connecting element 81 or 80. Since the collar 242 does not press hard on the outer rubber cover 92 and the rubber foam layer 90 against the connecting element 80, Low voltage is transmitted, in case of any transmission, through of layer 90 of foam rubber and cover 92. As a result, a tensile tension is transmitted only through the layer  mesh 240 and duct 82, since repeated traction of hose 22, as normally happens during operation, may cause duct 82 to detach completely of connection element 80 or 81, resulting in breakage of the hose 22.

Even assuming that necklace 242 can be gripped or tightly fitted around deck 92, will not allow cover 92 and / or rubber foam layer 90 transmit a lot of tension along the length of hose 22, since Layer 90 of foam rubber is porous, highly compressible, It has low tensile strength and extends throughout the cover length 92. As a result of its construction porous, the layer 90 of foam rubber is compressed under the force of necklace 242, making it difficult, if not virtually impossible, that collar 242 tightly engages cover 92 and lace stationary cover 92 to any connection element 80 u 81.

Another problem with this construction of the hose 22 is that the curvature of hose 22 in any point between the marine evacuation hose sections 262 of both connecting elements 80 and 81 may cause the conduit 82 form cocas undesirably, reducing or stopping even completely the flow of the hot molten mixture through the duct 82. Even worse, repeated formation of cocas in the same area of conduit 82 may weaken conduit 82, making it even more susceptible to repeated coconut formation until it cracks and breaks.

An additional problem is that hose 22 may be twisted during use, which may also twist, weaken and form cocas in the duct 82. Repeated twisting of the duct 82 may ultimately tear duct 82, doing Let it break.

Another additional problem is that cover 92 External is constructed of a homogeneous rubber side wall of approximately 3,175 millimeters thick and lacks any reinforcement structure inside the side wall of the roof, thereby making it relatively susceptible to the hose is crushed, in case a heavy load is applied to the hose 22, as can happen when a compactor or steamroller of the pavement pass over hose 22. If it is sufficiently heavy, the load can not only crush the outer cover 92, but can also crush the conduit 82, so that the flow of the hot molten mixture through conduit 82 is seen prevented or completely constructed, resulting in its break.

Unfortunately, hose breakage 22 normally requires replacement, since it is not appropriate for the hot melt mixture transport. When the hose damaged 22 is relatively new, its replacement is done under guarantee, significantly increasing undesirably the warranty costs, even when the damaged hose 22 can to be repaired, it is still an expensive operation since the hose repair requires large amount of hand from work.

Figures 15 to 18 illustrate a new 22 'hose construction of the present invention for the transport of materials that can flow heated, as per example a hot melt mixing material consisting of at least in part, of a material, such as petroleum-based materials, including without limitation pitch that can flow heated, bitumen, asphalt or other material that can flow properly that is heated to make it flow and apply while it is hot on an object as part of a process or repair operation. Although the hose construction of the present invention may be used to apply a conventional hot melt mixture, It can also be used to apply hot adhesive, a polymer hot, an elastomeric material hot, a material hot thermoplastic and a hot thermoformable material that return fluid when heated and should be heated until a fluid-like state before being applied to an object such as part of a repair process or operation. Although the hose 22 'of the present invention is suitable for transporting mixtures which can influence heated, it is also suitable for transport heated flowing material that is composed of only a single component, a single material, a single chemical, a only chemical compound or other material that can flow heated other than a mixture of materials.

As depicted in Figures 15 to 18, the Novel 22 'hose has a flexible reinforcement tube 270 internal and elongated through which the material that can flow flow heated and that is built and arranged to be flexible, so that the hose 22 'can be placed during use, while limiting the curvature of the airtight duct 82 to fluids up to a radius of curvature not less than approximately 25.4 mm to prevent the formation of cocas in the duct 82 and in tube 270. Preferably, flexible tube 270 is built so that it cannot bend over itself, so that a portion of the tube 270 is folded over another portion of the tube 270 at a point where tube 270 is curved to prevent the formation of cocas.

As Figure 15 is shown, tube 270 of flexible reinforcement is preferably an aluminum conduit flexible and helically interlocked of a construction conventional that may also be steel, copper or other material impervious to heated material that can flow flowing to your through during operation. Preferably, tube 270 is constructed of aluminum so that it is resistant, resistant to crushing, corrosion resistant, formation resistant of cocas, but of little weight.

The tube 270 is preferably formed of a strip 272 continuous elongation of a relatively thin material but generically rigid having a flange 274 extended outward in one direction along one edge of strip 272 and another measure 276 that extends outward in a direction opposite to what length of the other edge that is interlocked when strip 276 is helically wound and flange 274 hooked with a flange adjacent 276 of an adjacent part of the strip 272 to form a Generically cylindrical tube 270 that is flexible and compressible partially while providing excellent resistance to flattening. To limit axial compression of tube 270 while further increasing its resistance to crushing, strip 272 has a flange 278 extended toward outside radially with a generic U shape between flanges 274 and 276 and a flat part 280 along flange 278. The width of the flat part 280, together with the flange construction interlocking tube 270, helps to control the shape  in which the tube 270 can bend while also limiting the amount that can be compressed and expanded axially.

Preferably, the flexible aluminum tube 270 It has an external diameter between approximately 12,573 and approximately 12,446 millimeters, to allow the flow of the hot molten mixture without relative impediment through the same. Preferably, the tube 270 has a flange height between 1.5875 and approximately 0.79375 millimeters and a wall thickness of about 1 millimeter. Tube 270 is received inside conduit 82 and may move partially with relation to conduit 82 during operation. Although each end of tube 270 may be fixed next to each end of the duct 82 by friction fitting, captured between conduit 82 and the connecting element 80, or fixed in any other way, of so that each end of the tube does not move relative to the duct 82 at or near its end is preferably not fixed at each end.

During assembly, since tube 270 is axially compressible, a length of the tube longer than the axial length of conduit 82 is telescopically inserted from sliding form inside the duct 82, so that it floats before inside conduit 82. For example, when a length of the hose 22 '(and the duct 82) is 4,2672 or 4,572 meters, 6.7956 of tube 270 is inserted into conduit 82. When the duct 82 is 3,048 meters long, approximately 4.1148 meters of tube 270 is inserted into conduit 82. Al axially compressing the tube 270 prevents the formation of cocas by limit the radius of curvature of any tube curvature 270.

The conduit 82 is preferably constructed of, or lined with, tetrafluoroethylene (TEFLON) or other material appropriate polymeric, but may be constructed of any resilient and flexible synthetic plastic or polymeric material, such as nylon, polyurethane, polyethylene, a plastic or other material that is relatively impervious to the material that it can flow heated which flows through flexible tube 270. Preferably, the conduit 82 is impermeable to the products of the oil, tar, asphalt, and bitumen. TEFLON is the material preferred construction of the duct 82, since it is flexible, relatively impermeable to hot molten mixtures commercially available, offers relatively high resistance Low fluid flow and temperature resistant above 176.6 degrees Celsius, making it particularly suitable for conduct the hot molten mixture that can flow that has a similarly high temperature. In one embodiment Preferably exemplary, the conduit 82 has an internal diameter of approximately 19.05 millimeters to receive tube 270, so that there is a slippery or little tight fit between the themselves and have a wall thickness slightly greater than approximately 0.799375 mm. Between the ends of tube 270 and the duct 82, in sliding fit or little tight allows the tube 270 moves relative to the conduit 82 during the curvature to facilitate curvature of tube 270 and conduit 82 substantially at the same time.

Preferably, the conduit 82 has a sheath or sleeve 282 comprising a woven or mesh material constructed and arranged to improve the pressure resistance of the duct 82 to the fluid or material that can flow through tube 270 and / or duct 82. Although sleeve 282 may be constructed of steel or an alloy thereof, such as steel woven or mesh stainless, it is preferably constructed of woven or mesh nylon, or any other synthetic material appropriate high temperature resistant while it is also resistant to blowouts. Through this construction, the sleeve 282 imparts increased resistance against blowouts by duct 82.

Although the hose 22 'is designed to be heated during operation, the element conductors heater 30 are preferably directly wound around sleeve 282. To retain conductors 30 against the sleeve 282, there is a retention layer 284 on the conductors 30 preferably comprising silicone tape 284. If desired, however, the conductors 30 of the element heater may be wrapped around a layer of silicone or a similar material that encloses the sleeve 282. While the hose 22 'of the present invention is very appropriate for use with the three-phase heating element system novel disclosed herein, may also be used with a single phase heating element or other type of heater hoses

With reference now to the ends of the hose 22 ', one end 286 representative of hose 22' is shown in figure 15. The end of the hose 286 shown in Figure 15 is substantially the same as its opposite end (not represented) except that the opposite hose end may be constructed without the conductor 30 of the heating element entering or exiting the hose 22 '. In addition, as represented Figure 15, recessed within each end of the hose 22 'is finds a connection element assembly 287 comprising a transition connection element 80 and a connection element tilting 288.

In the form showing figure 17, the element of connection 80 'is substantially the same as the element of connection 80 depicted in figure 14. Preferably, it is virtually identical and therefore not described with more detail in the present report. The connection element 80 'is more  axially recessed inside the hose 22 'than in the hose 22 to accommodate the tilting connection element 288 within the hose 22 '. When placing the connection element in a recess swingarm 288, helps to isolate the connection element tilting 288, thereby reducing heat losses of the hot mixing material flowing through the element of tilting connection 288. By decreasing heat loss, it requires less energy to keep the molten mixture warm than flows through the hose 22 ', also serving as an aid to maximize the flow rate of the hot melt mix material to through hose 22 '.

With reference again to Figure 15, the connection element 80 'has an end with 248' nails received fluid tight reform at the end of duct 82, with the partially external end of the end with 248 'nails preferably near or pressing on one end of the tube flexible 270. To help keep duct 82 on the connecting element 80 ', there is a metal splint 290 hugged to, or crimped around, duct 82, pressing the conduit 82 and putting it in intimate contact with a part of the 248 'end of the connection element.

With additional reference to Figure 18, the tilting connection element 288 is constructed to allow that the hose 22 'rotate at each end in relation to the unit dispenser 24 or boiler 38 or a connecting element of the dispensing unit 24 or boiler 38. By allowing the hose 22 'can rotate, the twisting of hose 22' is minimizes, serving as additional help to prevent the conduit 82, as well as tube 270, form cocas and tear.

The tilting connection element 288 has a external housing 292 with a female threaded connection element 294 at one end that curls into the male threaded end 246 'of the connection element 80 '. Extended down from the inside of the housing 292 there is a male connection element 296 externally threaded, constructed and arranged to rotate with in relation to the housing 292, which is preferably screwed into a female connection element in the dispensing unit 24 or the boiler 38. The connecting element 296 male swingarm has a 298 square or exagonal nut located next to housing 292 which is located outside the hose 22 ', so that you can lock with a wrench or other tool to thread it inside or unscrew the female connection element of the dispensing unit 24 or boiler 38.

To supply a seal to the fluids between a part 300 of the tilting connection element 296 threaded received inside the tilting housing 292 and the housing 292, the connection element 296 has a grease seal or anti-dust 302 between it and housing 292 which preferably it comprises an o-ring 302 constructed of a type material BUNA-N or similar joint material appropriate. To facilitate the rotation of the connecting element 296 in relation to housing 292, there is a plurality of bearings of balls 304 circumferentially separated between the element of connection 296 and housing 292 which are preferably constructed of chrome or any other suitable bearing material. For additionally supply a joint, the connecting element rocker 288 has a pair of o-rings 306 separated at axially preferably constructed of HYTREL or similar that wall another 308 O-ring constructed of a seal material appropriate which is preferably AFLAS or VITON.

To prevent connection element 296 from separate from housing 292 although it may rotate relative to the housing 292, housing 292 may be, and preferably is, Built with an extended fixing bolt or bolt radially inward (not shown) that is sitting on a complementary groove (not shown) on the outer surface of the internal part 300 of the connecting element that extends around the circumference of part 300 of the element of Connection. Preferably, both the housing 292 and the element of threaded connection 296 of the tilting connection element 286 are constructed of zinc-coated steel, so that it is appropriate for hydraulic oil applications, allowing you handle hot melt mix materials.

To transfer tension during traction of the hose 22 ', away from internal duct 82, hose 22' has a generally cylindrical outer protective cover 310 and hollow extending from one end of the hose 22 'to the opposite end of the hose 22 'which is fixed so motionless at each end of the hose 22 'to assembly 287 of the connecting element and secured to the tilting housing 292 or the nut 250 'of connection element 80', or both.

Preferably, cover 310 is constructed of a somewhat flexible, resilient and durable material that preferably it is resistant to relatively high temperatures in excess of approximately 148.9 ° C. Preferably, cover 310 comprises a lateral wall 312 generally cylindrical continuous composed of a durable thermosetting material, so that can resist its displacement when creeping along the pavement, as well as resistant to abrasions, cuts and bumps that can produce during use. Preferably, cover 310 It is constructed and arranged so as to limit the curvature of the duct 82 and that cannot be bent with a radius of curvature not less than about 38.1 mm.

Preferably, the side wall 312 of the Cover is made of rubber, such as PVC rubber (a mixture of acrylonitrile-butadiene rubber and polyvinyl chloride) or the like and that can be laminated with a relatively thin sheet of a helically woven fabric around its outer surface. If a resistance to the higher temperature, the side wall of the roof may be Constructed of neoprene rubber. A cover 310 of this construction is relatively rigid but flexible to allow that the hose 22 'bends in a limited way while avoiding the bend radius of the bent hose is too much small to prevent the formation of cocas in the duct 82.

To lend resistance to curvatures and extreme crushing of deck 310, deck 310 is preferably reinforced with a wire 314 generically helical and continuous embedded within the side wall 312 of the Case. Preferably, the wire 314 is constructed of steel for spring, stainless steel or other rigid material so that the cover 310 can withstand the curvature and crushing of the cover 310, said form protecting conduit 82 and tube 270 of crushing.

In the form shown in Figure 15, the cover 310 encloses both the connecting element 80 'and the connecting element tilting connection 288 serving as an aid to isolate them. Preferably, the inner diameter of the cover 310 is greater than  the outer diameter of the duct 82, even with the element heater 30 wrapped around it, so that there is a air gap 316 angular insulation between the outside of the silicone tape 284 and the inside of cover 310. If you If desired, an insulating foam or other insulating material may be provided in free space 316.

In the exemplary preferred embodiment, cover 310 is a flexible bellows type hose that has an internal diameter of approximately 31.75 millimeters and a wall 312 which has a thickness of approximately 4.7625 millimeters, with an embedded integral spiral or helical reinforcement wire 314 which has adjacent 314 separate wire loops partially a little more than about 9,652 millimeters. By For example, an appropriate cover 310 may be a hose built according to SAE J 1527 standard, which also complies with U.S. marine hose requirements Coast Guard Type B-2 Preferably, cover 310 is a evacuation or marine fuel hose that has the dimensions mentioned above and that meets the standards and / or other requirements mentioned above. Preferably, cover 310 is an evacuation hose or flexible bellows type marine fuel. If desired, cover 310 'may also comprise a rubber gasoline hose Reinforced helical steel or a hose for gasoline Rubber type flexible bellows of similar construction.

Advantageously, a cover 310 of this construction is fluid tight, hard, durable, resistant, flexible, resistant to coconut formation, crush resistant, relatively impermeable to most of chemicals and twist resistant for prevent the formation of cocas and tears inside the duct 82 while also preventing tension transmission from the hose to the conduit 82, serving as an aid to prevent the conductor 82 is released by tension of the connecting element 248 '.

The protective outer cover 310 is fixed of motionless at each end to those of the tilting housing 292. Although the cover 310 can be fixed by adhesive to the housing swingarm 292 or secure to housing 292 using one or more fasteners (not shown), cover 310 is preferably fluid tightly attached to the housing 292 by an external metal collar 318 that presses the cover 310 against the housing 292. Preferably, the collar is embedded around cover 310 and housing 292 adjacent element of rocker connection 296 pressed cover 310 in contact intimate with the tilting housing 292. Through this construction tight drawing, none of the connection elements 80 'and 288 can be released by pulling the cover 310 during the operation, as a result of tensile forces (tension over the hose) transmitted mainly along the cover 310 to connection element 288 and vice versa, minimizing said form the force transmitted by, and through, the conduit 82.

If desired, one end of collar 318 may be embedded down so that it forms a lip 320 around the end of cover 310. If desired, lip 320 may extend radially inward beyond the end axial of the tilting housing 292, so as to interfere with the housing end 292 to oppose the removal of the housing 292 of cover 310.

The collar 318 is preferably constructed of a metal that is preferably steel. However, if desired, the Necklace 318 may be constructed of copper, bronze, aluminum or any other appropriate metal or nonmetallic material. For example, the collar 318 may be constructed of a shrinkable material by the  heat that is tightened by heat around deck 310 and of the tilting housing 292.

To allow element wiring Heater and temperature sensor is inserted around of the inner conduit 82, the cover 310 has a hole 320 a through which the wiring extends. To prevent the cover flex 310 tear cover 310 in, or around of, hole 320, collar 318 extends axially beyond, and around, hole 320, in the form shown in the figure 15, to limit the amount of movement and flexion of the cover 310 near hole 320, in effect providing a relief against efforts to cover 310. To accommodate the wiring 30, collar 318 itself has a through hole 322 a through which the wiring 30 also passes.

During assembly, conduit 82 is cut according to size and the connection element 80 'is inserted into the duct 82. Next, flexible tube 270 is inserted inside the conduit 82, preferably until its axial end makes contact with, or is adjacent to, end of insert inserted 248 'of the connection element of the connection element 80 '. Next, the connecting element 81 is fixed to the other end of the duct 82, capturing inside the tube 270. The tilting connection element 288 is fixed to the threaded end 246 'of connection element 80' and conduit 82 is inserted inside cover 310. Before conduit 82 is inserted inside cover 310, it is wound with a wiring 30 of the heating element. Each end of cover 310 is fixed to the tilting housing 292 by the collar 318, resulting in a 22 'high temperature hose that is ready for use.

Once the hose 22 'is assembled, it fixed at one end preferably to an object generically static, such as a boiler 38, and at its other end to an object that can be, and usually is, maneuvered during operation, such as the dispensing unit 24. If desired, two or more hoses 22 'can be coupled to make longer the length of the hose.

In operation, the heated mixing material hot melt that can flow flows through the inside of the flexible tube 270 from one end of the 22 'hose to the other end of the 22 'hose. As the hose 22 'is twisted, one or both swingarms 288 at each end of the hose 22 'allows hose 22' to rotate relative to each one or both of between the dispensing unit 24 and / or the boiler 38, thereby avoiding excessive twisting of one's own hose 22 ', thereby preventing the formation of cocas and the collapsed duct 82. Cover 310 will inherently resist the twisting of the hose 22 'and the conduit 82.

As the hose 22 'curves, the cover 310 withstands the curvature to serve help and prevent the hose 22 'from reaching a radius of curvature so small that the duct 82 forms cocas. In addition, the cover 310 curvature resistant, flexible tube 270 inside the duct 82 further resists the curvature thereof shape.

As the hose 22 'is compressed externally and radially inwards by a force of external crushing, reinforced wire construction of the Deck 310 resists crushing Deck 310, also protecting the duct 82 and 270 in said way inside. In case cover 310 is crushed so that it contact conduit 82, tube 270 supplies a resistance to additional crushing of the duct 82.

As the hose 22 'is pulled, the most of the tension, if not virtually all, and therefore the resistance, is transmitted from one end of the hose 22 'at length of cover 310 to the other end of hose 22 ' by virtue of the fact that the cover 310 is rigidly fixed to the tilting housings 292 on both ends and housings swingarms 292 are rigidly connected to boiler 38 and to the dispensing unit 24. Preferably, the actual voltage applied to the duct 82 during the stretching of the hose 22 'is minimizes advantageously through this hose construction novel since most, if not virtually all, tension is transferred around conduit 82 to the elements of distal connection 288, avoiding such a form that any end of the duct 82 is released by traction of the element of connection 82.

3. Novel heating element

To prevent the molten mixture from heating inside of hose 22 solidifies in hose 22 during operation, the heating element is overwhelming coaxially in a spiral or helical arrangement around the inner wall 84 of the hose 22. The heating element 30 it comprises a cord 94 that has three conductors 96 that carries each a current during operation to generate heat and heat the hot molten mixing material inside conduit 82 of the hose.

The three conductor heating element 30 is a three-phase heating element to carry three-phase current and more efficiently heat the hot molten mixture inside the hose 22. In the form shown in Figures 4 and 4B, the cord 94 of the heating element has a first conductor 98 to carry a phase of the three-phase heating current, a second conductor 100 to carry another phase of the heating current three-phase, and a third conductor 102 to carry another phase of the 3-phase heating current.

In the form shown in Figure 4B, to avoid that electricity passes between conductors 98, 100 and 102 During operation, the outer bead material is constructed of an electrically insulating material 132 that preferably also separates each conductor from the others conductors to avoid additional short circuits. Cord 94 is elongated and of a generically oblong cross section, having an upper surface 134, a lower surface 136 and a pair of sides 138 constructed and arranged so that their width is at least slightly greater than its thickness. For maximize heat transfer between conductors 98, 100 and 102 and hose 22 and hot melt mixture material flowing through the hose 22, the cord 94 is rolled around hose 22, so that one of its surfaces Elongated 134 or 136 are in contact with hose 22. Preferably, the cord 94 is wrapped around the hose 22, so that its surface 136 is generically lower flat is in contact with the silicone layer 86 superimposed on the inner wall 84 of the hose and that rests against wall 84 internal hose. In this way, the heat generated by the Three conductors 98, 100 and 102 is effectively transmitted through of the silicone 86, the inner wall 84 of the hose and the material of the hot molten mixture flowing through the hose 22 to help the material to be in a state That can flow.

To supply the desired hot flow at length of hose length 22 and prevent solidification, the distance, to, between loops or adjacent curls of the 94 cord is approximately 19.05 mm. Alternatively, the cord 94 may be wrapped around hose 22 of so that the distance between adjacent loops or windings, to, is between approximately 12.7 mm and approximately 25.4 mm In a preferred embodiment, the cord 94 of the heating element, conductors 94, 100 and 102, separation, a, between adjacent loops of cord 94 and three-phase current applied to the cord 94 are selected to supply a flow calorific value of approximately 0.5425 watts per cm2.

Each conductor 98, 100 and 102 of the cord 94 is constructed of an electrically conductive material that has a sufficient resistance to the flow of electric current, so that generates heat to the passage of current through the conductor of the heating element. Preferably, each conductor 98, 100 and 102 It is constructed of a resistive copper material, Nichrome, a alloy iron-nicromo-aluminum, or other electrically conductive and electrically resistive material that produces heat after the application of electric current. Preferably, each conductor 98, 100 and 102 is constructed of TEFLON coated copper and may have a conductor diameter of approximately 18 gauge.

Advantageously, the construction and layout of the heating element 30 is such that each conductor 98, 100 and 102 of the cord 94 of the heating element wrapped around the hose 22 generates heat when three-phase current is applied to the heating element 30. Advantageously, a conductor is not required neutral or return, so that all conductors 98, 100 and 100 of the heating element 30 generates heat to heat more efficiently the hot melt mix material inside hose 22 and dispensing unit 24. As a result, the area surface for heat generation is maximized by unity of cord length 94 of the heating element compared to a cord of single phase heating element.

At the end 106 of the hose boiler 22, the inlet end 112 of the cord 94 of the heating element it is preferably in electrical communication with a source 114 three-phase electrical power (figure 1) to receive power three-phase electric power source 114. With reference additional to figure 5, at the end 108 of the dispensing unit of the hose 22, preferably the cord 94 is fixed by a connector 116 to the heating element 30 of the dispensing unit 24. Since it is not necessary to heat the cord portion 94 exposed between the dispensing unit 24 and the hose 22, the cord 94 preferably has a non-heating part 118 between the dispensing unit 24 and hose 22 which is preferably constructed of a copper conductor of larger diameter that can be of a 14 gauge or thicker.

Alternatively, the cord 94 of the element heater may be built and ready to end in, or next to, the end 108 of the hose distributor unit 22, as for example in reference number 120 (figure 4), if it is only necessary to heat hose 22 and not the unit distributor 24 during the operation. If the cord 94 of the element heater ends at end 108 of the distributor unit, each of the three conductors 98, 100 and 102 is connected together, preferably in reference number 120, for form a circuit of the complete three-phase heating element.

To allow to detect the temperature of the material of the hot molten mixture inside the hose 22, the hose 22 also preferably has a temperature sensor 122. In the form shown in Figure 4, the temperature sensor 122 is received in a recess in foam insulation layer 90 and attached to the hose 22 by at least one layer of tape 124 which is preferably silicone tape. Preferably, sensor 122 is fixed to hose 22 so that it rests against the wall internal 84 of the hose to be able to detect more precisely the temperature of hose and molten mixture material heat in hose 22 in sensor region 122.

Preferably, temperature sensor 122 is a thermocouple 126 type RT to supply an electric current representative of the temperature of the hot molten mixture inside hose 22. To communicate current from the sensor 122 to the device, such as preferably the controller 128 (figures 1, 6 and 8), sensor 122 has a pair of conductors 130 extended from it. Preferably, the sensor 122 is arranged at least 15.24 cm from the end axial connection element 80 at end 106 of the boiler hose 22 to facilitate temperature measurement precise. Alternatively, sensor 122 may be a thermistor or another type of sensor capable of detecting the temperature of the mixture hot melt inside hose 22.

Alternatively, if desired, the sensor temperature 122 may be fixed to the dispensing unit 24 to measure the temperature of the hot melt mixture material in a remote point of the boiler 38. Alternatively, it may be possible use a pair of sensors (not shown) with, for example, a sensor in communication with hose 22 and the other of the sensors in communication with the dispensing unit 24. However, the Preferred embodiment of the present invention requires only a single sensor 122 carried by hose 22 capable of detect or represent the temperature of the mixture material hot melt inside hose 22 and next to the sensor 122.

Advantageously, as a result of construction and arrangement of the three-phase heating element 30, the construction of hose 22 and the use of three-phase electric current to heating the hot molten mixture only one sensor is needed of temperature 122 when necessary. Alternatively, more than a temperature sensor may be used, if desired, to supply the temperature of the hot melt mixture along from different hose locations 22. Alternatively, more than one temperature sensor may be used, if desired, to supply the molten mixture material temperature heat in dispensing unit 24 or to different locations along the dispensing unit 24.

B. Construction of the dispensing unit

The dispensing unit 24 has a gun dispenser 68 with an elongated hollow cylindrical body 140 and generically cylindrical that extends outward from the gun 68 to allow molten mixture material hot can be dispensed from the dispensing unit 24 so convenient on the floor without an operator 28 having to be crouched, uncomfortably or uncomfortably during operation. The cylindrical body 140 of the dispensing unit 24 it is preferably constructed of a tube 142 or elongated pipe and generically cylindrical and rigid that may be constructed of a metal, such as stainless steel, a plastic as per example a thermosetting; a composite material like nylon glass filling, a ceramic material, a combination of themselves, or a different appropriate material. Tube 142 is hollow for allow the passage of the material of the hot molten mixture to through tube 142. Tube 142 is preferably received by thread in a complementary threaded female connecting element of the dispensing gun 68.

Generically coaxially superimposed on flow tube 142 of the hot molten mixture, is a outer cover 144 which is preferably also generically tubular and elongated. External cover 144 is separated radially enough outwardly away from the tube 142 of flow of the hot molten mixture, so that it isolates a user 28 of the mixing heat dispensing unit 24 hot melt flowing through tube 142. Preferably, the cover 144 is a support tube 146 that is fixed to the dispensing gun 68 at one end and to a dispensing cap 148 at the other end. In order to handle the dispensing unit 24 rather long during operation, a user 28 will be able to grab a handle 152 fixed to the support tube 146 at a location arranged downstream of the dispensing gun 68.

The duckbill valve 72 is carried by the cap 148 on the nozzle 151 at the free end 150 of the dispensing unit 24. The cap 148 is also fixed to the free end of tube 142 of the hot molten mixture and has a outer diameter greater than the outer diameter of the tube 142 of the hot molten mixture to coaxially separate and out the support tube 146 of tube 142 of the hot molten mixture. Yes desired, an envelope 154 between the flow tube 142 of the hot molten mixture and support tube 146 may contain a insulation such as open or closed cell foam.

In the form shown in figure 5 the unit hot melt mix applicator dispenser 24 has also a heating element 30 which preferably extends up to the proximity of the free end 150 of the dispensing unit 24 to supply heat to the hot melt mixture material in the flow tube 142 of the dispensing unit 24. To complete The three-phase electric heater circuit, conductors 98, 100 and 102 of the cord 94 of the heating element are connected together electrically preferably in, or in proximity of the distal hood 148.

In the form shown in Figure 5, a part 118 preferably non-heating cord 94 of the element hose heater 22 emerges from collar 158 adjacent to end 108 of the hose 22 and connects to another part 118 of the preferably non-heating element of the cord 94 of the element heater of the dispensing unit 24. When the material of the hot molten mixture leaving hose 22 penetrates the dispensing gun 68 is preferably redirected through an elbow 156 generically perpendicular to the gun 68 inside the flow tube 142. To prevent solidification of the material of the hot molten mixture in the region of elbow 156, at least one part of the cord 94 of the heating element preferably does contact directly against elbow 156. If desired, one or more cord loops 94 may be wrapped around elbow 156. If desired, elbow 156 and cord 94 of the heating element may be constructed and arranged so that a part of the cord 94 is directly submerged in the material of the mixture hot melt

Preferably, the construction, layout and separation, a, of the cord 94 from the three-phase heating element helically wound around the outside of the flow tube 142 of the hot molten mixture of the dispensing unit 24 are substantially the same as that of the cord 94 of the element heater wrapped around hose 22 described previously in this report and therefore not considers it necessary to describe them again.

IV. System, circuit and heating element control three phase

Figure 6 illustrates a heating system 160 three-phase to controlily supply heat preferably to hose 22 and dispensing unit 24 for heat and keep molten mixture material warm heat in hose 22 and in dispensing unit 24 at a temperature at which the material can flow. The system Three phase heater 160 comprises an electrical circuit 160 includes a source 114 of three-phase power coupled to the cord 94 of the three-phase heating element of hose 22 and the unit hot melt mix dispenser 24, with the operation of power source 114 and controlled heating element 30 by the temperature controller 128. As shown in the Figure 6, the cord 94 of the hose heating element 22 is connected in series to the cord 94 of the heating element of the dispensing unit 24.

A. Three-phase power source

Preferably, the three-phase power source 114 is a delta 162 three-phase power source, in the form shown in figure 6. Alternatively, for example, the source of power 162 may be a three-phase power source (not represented). To selectively control the application of power to the heating element 30, the power source Three-phase 162 has a control input 164 in communication with a control output 165 of the temperature controller 128 which allows controller 128 to selectively control the operation of the heating element 30 and directly control the operation of the power source 114.

In the form shown in Figure 6, the source of power 114 preferably comprises a three phase generator 166 which has a stator 168 in electrical communication with the element heater 30 and a rotor 170 connected to control input 164. The generator control input 164 is connected to an output 165 temperature controller control to enable the Generator 166 operation is directly controlled. The stator 168 is built and arranged in a delta 162 configuration that it has an output terminal 172 connected to conductor 98 of the heating element of the heating element cord 94, other output terminal 174 connected to conductor 100, and another terminal output 176 connected to the conductor 102 of the element heater.

The rotor 170 has a winding 178 in magnetic field communication with a winding 180 of stator 168 with a winding branch 178 grounded 182 and another branch of winding 178 connected to output 165 of the controller temperature. To prevent the backflow of the current around the rotor winding 178, there is a diode 184 connected in parallel with winding 178 to control input 164.

During generator operation control 166, stator 168 is energized after the application of current from output 165 of the temperature controller to input 164 of the rotor, thereby causing the generator 166 to generate and supply three-phase electrical power to the heating element 30 three-phase hose 22 and dispensing unit 24. When not control current is applied to rotor 170 by the controller temperature 128 no electric power is generated by the generator 166. Therefore, when the temperature controller 128 wishes that the heating element ceases to supply current to the hose 22 and dispensing unit 24, controller 128 ceases of supplying control current to rotor 170. In this way, the amount of heat applied to hose 22 and unit 24 The dispenser may advantageously be controlled in a controllable manner. a relatively precise way.

When the controller control current of temperature 128 is applied to rotor 170, the current causes the rotor winding 178 generates a magnetic field that communicates with the winding of the stator 180, causing said shape to be generated electric power In this way, the control current energizes the stator 168, causing it to produce electric current. When control current is not applied, magnetic field is not created and no Power is generated.

With additional reference to Figure 7, the Generator 166 has a pulley 186 on its input shaft coupled to a pulley 188 on the drive shaft of the motor 52 by a belt flexible 190 endless. The generator 166 is supported by a clamp 192 fixed to support frame 32 and three outputs 172, 174 and 176, one for each phase of power supplied to the conductors 98, 100 and 102 of the heating element.

Preferably, generator 166 is a modified vehicle alternator 194 coupled to engine 52 in the shape shown in figure 7. Preferably, alternator 194 is modified, so that it produces a three-phase current at through output terminals 172, 174 and 176. Preferably, alternator 194 is a conventional vehicle alternator modified, so that a regulator circuit of voltage or a rectifier, directly supplying the power electric from alternator 194 to conductors 98, 100 and 102 of heating element cord without being regulated by any voltage or current regulator.

The alternator 194 may preferably be a modified nail pole alternator, although the alternator may be of a compact alternator construction, it may be a outgoing pole alternator, may be an alternator that has a rotor without winding, or it may be another type of generator capable of generate three-phase electrical power. Preferably, the alternator 194 is model number 333 of Southwest Products for produce three phase current. Said alternator 194 produces preferably no more than about 60 volts and at least approximately 20 volts and several amps of electrical power during operation to make heating element 30 generate a desired amount of heat to achieve and maintain the flow capacity of hot melt mixture material inside the hose 22 and the dispensing unit 24. In a way of preferred embodiment, alternator 194 produces preferably about 36 volts under conditions of generally optimal operation. Obviously, the load on the engine generated by the hydraulic pump and other engine loads may cause some fluctuations in the output voltage. Alternatively, the voltage and amperage output of the alternator 194 may be more or less a function of the alternator's construction  194, engine output speed 52, alternator load 194 produced by heating element 30, as well as others factors.

B. Temperature controller

The temperature controller 128 is shown in block form in Figure 6 with a number of points representing the various input and output connections of the controller 128. During operation, the temperature controller 128 communicates with the temperature sensor 122 set to the hose 22 and energizing or de-energizing the generator 166 in response to the temperature of the hot molten mixture / hose detected by the sensor 122. If the temperature of the hot molten mixture is high enough, indicating that the material of the hot molten mixture inside the hose 22 it is at a temperature at which it flows properly, the generator 166 is neither energized nor de-ergonized, causing said form that the generator 166 does not supply electrical power to the heating element 30. In case the temperature of the hot molten mixture is below a predetermined value indicative that the material of the hot molten mixture d between the hose 22, (1) is not at a temperature at which it flows easily, or (2) is approaching a temperature below which it does not flow easily, the temperature controller 128 preferably energizes the generator 166 to originate that electrical power is supplied to the heating element 30, so that the hose 22 and the dispensing unit 24 heat properly to ensure the flowability of the material of the
hot melt mixture.

To supply power to controller 128, the controller 128 is connected to a power source 196 that preferably it is a direct current power source, such as a battery of a conventional construction or Similary. In the form shown in Figure 6, a positive terminal 198 of the battery is connected to pins 3 and 6 of the 128 temperature controller to supply electric current to controller 128. A negative terminal 200 of battery 196 is grounded 202, which may preferably be in electrical communication with the ground terminal 182 of the rotor. In addition to being grounded 202, the negative terminal 200 of battery 196 is also connected to pin 5 of the controller of temperature 128.

One conductor 130 of the temperature sensor 122 is connected to pin 1 of temperature controller 128 and the other conductor 130 of the sensor 122 is connected to pin 2 of controller 128 so that controller 128 communicates with the sensor 122. To control the operation of generator 166 based on the temperature of the hot molten mixture, pin 7 of the controller 128 is output 165 that is connected to the input of control 164 of generator 166. Preferably, pins 1 and 2 of controller 128 extend from a circuit 230 thermostat integral (figure 6A) of controller 128 which has a mechanism switch 232 (figure 6A), such as a switch conventional, a solid state switch, a relay or similar for  allow the current to be supplied selectively to the rotor inlet 164 when the hose temperature with of The hot molten mixture is too low. Preferably, the switching mechanism 232 of thermostat circuit 230 controller supplies a direct control current or indirectly from battery 196 to output 165 of the controller that communicates the control current to the control input 164 of generator 166.

With further reference to Figure 8, the 128 temperature controller, including its internal circuit, is received in a control box 204 that is fixed to the outside of boiler 38. If desired, battery 196 may be also located inside control box 204. To activate the controller 128, box 204 has a switch 214 of "on / off" and an indicator light 216 on the part upper of the box 204. Preferably, the indicator light 216 is turns on when switch 214 is switched to its position "activated".

In the form shown in Figure 8, mounted on the face of the control box 204 is an indicator tag 206 indicating a plurality of temperature establishments of control that controller 128 can set during operation. Tag 206 has a plurality of establishments 208 temperature control arranged in semicircle around of a control button 210. In a preferred embodiment, as shown in figure 8, the establishments of 208 temperatures vary between 93.3ºC and 204.4ºC and have intervals of intermediate temperature of 5.5ºC marked by lines that emanate radially outward on the face of the label 206. Alternatively, depending on the temperature range of desired control, controller 128 limitations, material that is being heated and applied, the flow of the material that flows through the hose 22 and the dispensing unit 24 as well Like other factors, tag 206 may have different temperature ranges Routine tests may be performed and experimentation to determine an optimal temperature range for different materials of the molten mixture, different applications, different flows, different conditions of operation, and other factors.

Control button 210 has an arrow indicator 212 indicating the desired control establishment of the temperature controller 128. To communicate the establishment control to the thermostat temperature controller circuit, the button 210 is preferably fixed to an axis of a component electric capable of selectively controlling that preferably it is a variable resistor, a potentiometer or similar, which sets the desired control temperature of the controller 128.

Alternatively, other means to establish the Control temperature may be used. For example, an entry digital or analog to enter the control temperature is can use. If a digital input is used, for example, you can comprise a pair of pressure buttons coupled to a reading digital to increase temperature control when one of the buttons is pressed and decrease it when the other of the Buttons is pressed.

In a preferred embodiment of the 128 temperature controller, the temperature selection of control using button 210 controls when generator 166 is energized, thereby controlling the heating of the hose 22, dispensing unit 24 and mixing material fused into hose 22 and dispensing unit 24. By example, if button 210 sets a control temperature of 93.3 ° C, as shown in Figure 8, controller 128 may be programmed to energize generator 166 when the hose temperature with hot melt mixture detected by thermocouple 122 and controller 128 falls to (1) the control temperature or (2) a predetermined temperature by below the control temperature.

If controller 128 is programmed to energize generator 166 when the temperature of the mixture melted is below the control temperature, it may be programmed to energize when the temperature of the molten mixture  it reaches a certain preselected temperature below the control temperature For example, controller 128 may preferably be programmed or preset so that Energize generator 166 when the temperature of the mixture molten is 5, 10, 15 or even 20 degrees below the control temperature

Similarly, controller 128 may be programmed to de-energize generator 166 when the temperature of the molten mixture is elevated to be the same as the control temperature as when it reaches a temperature by above the control temperature. In a form of organization Preferably, controller 128 de-energizes generator 166 when the temperature of the hose with the molten mixture reaches a predetermined temperature above the control temperature. For example, controller 128 may be programmed or preset so that generator 166 de-energizes when the temperature of the molten mixture is at a temperature that is 5, 10, 15 or even 20 degrees above the temperature of control.

Therefore, controller 128 may be programmed to have a higher set point of the control temperature above the control temperature set by user 28 and a set point lower than the control temperature that may be the same or by below the control temperature set by a user 28 so that controller 128 can control the operation of the generator, so that hose 22 and dispensing unit 24 and the material of the molten mixture inside the hose 22 and the dispensing unit 24 are sufficiently heated during the operation. Preferably, said points of establishment of the upper and lower control temperature "float" around of, or are indexed to, the control temperature set by the user 28.

Preferably, controller 128 has a thermostat circuit 230 of a conventional constitution for supply one higher control temperature point and another lower that is linked to the set control temperature by user 28. Preferably, controller 128 is the model PAKSTAT number P64A0918904, manufactured by Paktronics Controls, Inc., of Fort Worth, Texas, and which provides such capabilities. Alternatively, controller 128 may be another type of controller, such as a programmable controller capable of control the operation of the generator based on the temperature detected from one of the following: hose 22, unit dispenser 24, hose 22 and dispensing unit 24, the material of the molten mixture inside hose 22 and / or the dispensing unit 24, an appropriate combination of same.

V. Motor control

In the form represented in Figure 9, in another preferred embodiment of controller 128 ', the 128 'controller may be built and arranged to form part of an engine control system 226 to control the operation of motor 52 and regulate the material temperature of the molten mixture inside hose 22 and dispenser unit 24. To control the operation of motor 52, controller 128 ' has a control line 218 in communication with a controller of engine 220 which is preferably a choke controller 222. Preferably, the choke controller 222 controls selectively the speed of the motor 52 when directly controlling in the throttle position of the engine 52 during operation. By directly controlling the speed of the motor 52 during the operation, the amount of electrical power generated and supplied to hose 22, the dispensing unit 24 may also be controlled to allow heat input to be regulated inside the hose 22 and the dispensing unit 24.

Preferably, regulator controller 222 is a solenoid operatively connected to the engine choke 52, to be attached to the motor choke cable 52 or Similary. In response to a control signal from the controller 128 sent along control line 218, the choke controller 222 changes the position of the engine choke when solenoid is energized, moving The choke If desired, the controller control signal 128 'may be applied directly to the solenoid itself to selectively control the position of the choke. Alternatively, the choke controller 222 may be integral with the 128 'controller.

If desired, the engine speed and 52 may controlled and based on the temperature of the molten mixture detected by the temperature sensor 122 increasing the motor speed if the temperature detected is too low and descending if it is too high, in the necessary way. By For example, engine speed may be increased or decreased in relation to the control temperature established and regulated in the way explained above.

Preferably, the speed of the motor 52 may be controlled based on the load placed on generator 166 to ensure that adequate electrical power is supplied to the heating element of the hose 22 and the dispensing unit 24. In a preferred embodiment, the controller 128 'has a line 224 (in dashed lines) in electrical communication with one or more output terminals 172, 174 and 176 of generator 166, or conductors 98, 100 and 102 of the heating element to detect (1) the voltage, (2) the amperage or (3) both the voltage and the amperage to ensure that heating element 30 is generating an appropriate amount of heat as set forth in the Operating conditions.

If the electrical measurement detected is too much low, such as a voltage set point or of the control current, the controller 128 'accelerates the motor 52 to make generator 166 emit more electrical power by heating element 30. On the contrary, if the electrical measurement is too high, as above a point of establishment of the voltage or control current, the controller 128 'reduces the motor speed so that less electrical power is supplied to the heating element 30, originating in said way that apply less heat to hose 22 and the dispensing unit 24.

In a preferred embodiment, the 128 'controller regulates engine speed based on the generator output voltage detected 166. If the voltage of output is below a predetermined output voltage desired, the controller will accelerate the engine speed, thereby increasing the output voltage until it reaches or properly exceed the desired tension. On the contrary, if the output voltage is too high, motor 52 is accelerated preferably until the output voltage approaches or match within an acceptable range of stress Preset desired. In a preferred embodiment, the generator output voltage 166 is, for example, of approximately 36 volts to ensure the heating element heats with a flow of approximately 1.84 W / cm2.

Additionally, the controller 128 'may also function as a temperature controller 128 by also controlling the operation of the generator 166 in the manner explained previously. In combination, in response to the temperature of the molten mixture and the electrical output of the generator 166, the motor speed and the operation of the generator can be appropriately controlled to control the heating of the hose 22 and the dispensing unit 24 of a precisely controlled form, and with a wide range of operating conditions and
Similar.

SAW. Use and operation A. Use

In use, the three-phase heating system 160 of hose and dispensing unit of the present invention, which includes the three-phase generator 166, the heating element Three phase 30 and controller 128, it is very appropriate to control the heating of the hose 22 and the dispensing unit 24 of the applicator of molten mixture 20 and can dispense materials from molten mixture, such as bitumen, pitch, asphalt, mixtures of asphalt, petroleum-based mixtures, sealants based on oil, plastic sealants, plastic paints, plastics thermoplastics, and other thermoplastic materials, as well as others materials that can be flowed after the application of heat. Preferably, the heating system 160 is very suitable for use with conventional molten mix applicators, dispensers of asphalt, machines for sealing cracks in the pavement, and others types of dispensers and applicators of thermoplastic materials using a hose 22, a dispensing unit 24, or both a hose 22 as a dispensing unit 24 to dispense the thermoplastic material Although the system is very appropriate for your use with heated mixtures of two or more materials, the system hose heater 160 and dispensing unit of the present invention is also very suitable for heating molten materials Hot that are not mixtures. The control system 226 of the motor speed of the present invention is also very appropriate for such applications.

B. Operation

In preparation for starting, the switch 214 of temperature controller 198 is placed in position "activated" and control button 210 is placed at a desired control temperature for a particular material that is being applied by the applicator 20 of the molten mixture. Behind the applicator start 20, the material of the molten mixture inside of the boiler 38, inside the hose 22 and inside the unit dispenser 24 is heated to, or preferably above of, a temperature at which the mixture material flows cast.

After doing the aforementioned, the engine 52 is started, allowing three-phase electric current to be generated by the three-phase generator 166. To determine if generator 166 is being energized, temperature controller 128 communicates with the temperature sensor 122 to determine the temperature of the hose 22 and hot molten mixture inside hose 22 which is adjacent to sensor 122. If the temperature is below of the control temperature or below the point of lower temperature setting, sensor 166 is energized by controller 128, causing the current flow into each of the conductors 98, 100 and 102 of the element 3-phase heater that heats hose 22 and unit dispenser 24.

As the material of the molten mixture inside of the hose 22 and the dispensing unit 24 is heated, the material of the molten mixture begins to melt causing it to flow. When a sufficient warm-up time interval has elapsed, the hot molten mixture inside the hose 22 and the dispensing unit 24 will be hot enough to That can flow. Preferably, when the hot melt mixture inside the hose 22 and the dispensing unit 24 has reached a state that can flow and the temperature controller 128 detects that the temperature of the molten mixture has reached the higher temperature set point, the controller 128 de-energizes generator 166, said form ceasing the flow of current to the heating element 30.

If desired, controller 128 may supply a signal to operator 28, in the form of an indicator light or by any other form (not represented), of which the material of the molten mixture inside hose 22 and dispensing unit 24 has reached the desired temperature and is in a state that can flow. If desired, to accelerate the heating of the material the molten mixture during startup until it reaches the state that may flow, controller 128 may communicate with motor 52 to make the engine 52 operate a little faster than normal.

In operation, as the material of the molten mixture is pumped from the boiler 38, flows through hose 22 and is dispensed from duckbill valve 72 at the end of the dispensing unit 24 on the surface, which preferably it is a pavement, a road or the like. In case that the temperature of the material of the molten mixture within the  hose 22 fall below the lower control temperature or from the lower temperature set point, the controller 128 activates generator 166, supplying said current form to each of the conductors 98, 100 and 102 of the heating element 30, causing the mixture material fused inside hose 22 and dispensing unit 24 be heated. When the temperature of the sensor 122 reaches the point of superior temperature setting, controller 128 de-energizes generator 166, ceasing current flow to heating element 30.

The control system 160 is particularly well placed to keep molten mix material inside of the hose 22 and the dispensing unit 24 in a state that can flow during periods of inactivity, for example when the applicator 20 is operating but the mixture is not being dispensed hot melt When the applicator 20 is operating and not dispersing hot molten mixture, hot molten mixture not flows through the hose 22 and the dispensing unit 24, and by therefore it can cool inside hose 22 and the unit 24 dispenser, causing its solidification. During sayings periods, the three-phase heating system 160 maintains advantageously the material of the molten mixture at a temperature in the one that is ready to flow despite the cooling it has place normally.

Although the heating system 160 previously mentioned is designed to heat in a controllable way both the hose 22 as the dispensing unit 24, is inside the contemplated scope of the invention modify system 160 to which can control the hose 22 controllable, only the dispensing unit 24 or the hose 22 and the unit dispenser 24 independently of each other. Whether heat independently of each other, hose 22 has preferably its own heating element and the sensor temperature and the dispensing unit 24 preferably have their own heating element and sensor, with current flow controlled, so that it can be supplied to one of the heating elements independent of the other elements heaters

It should also be understood that, although the description above describes and the drawings illustrate in detail of one or more embodiments of the present invention, to the Those skilled in the art referred to in the present invention, what is currently revealed will suggest many modifications and constructions as well as other embodiments and applications different without departing from the scope of the invention. In addition, the present invention is intended to be limited only by the scope of the appended claims.

Claims (22)

1. An applicator (20) of a molten mixture hot, to dispense a material that can flow heated, which understands: a source (38) of heated material that can flow; a dispenser (68) for dispensing said material that can flow; a flexible hose (22, 22 ') that has a end in communication with said source (38) of material that can flow heated and its other end in fluid flow communication with said dispenser (68) to conduct the material that can heated flow from said source (38) of material that can flow heated to said dispenser (68); a pump (48) to press said material that it can flow through said flexible hose (22, 22 ') to said dispenser (68); a source (114) of electric current; Y a wiring (30) of the coupled heating element electrically to said source (114) of electric current; characterized in that said hose (22, 22 ') comprises an elongated external tubular flexible cover (310), an elongated tubular flexible internal conduit (82) received within said casing (310), and an elongated flexible tube (270) telescopically received from sliding form within said flexible internal duct (82) through which the flowing material flows; wherein said wiring (30) of the element heater is wrapped around said internal duct (82) flexible. 2. The hot melt mix applicator of claim 1, comprising a current source (114) three phase electric; Y a heating element (30) of an electrical phase three-phase supplied with three-phase electric current from said three-phase current source in thermal relation with said hose (22, 22 ') to heat the material that can flow in said hose. 3. The hot melt mix applicator of claim 2, comprising a controller (128, 128 ') of temperature to control the heating of said material that it can flow into said conduit (82) by controlling said heating element; a temperature sensor (122) in cooperation with said conduit (82) and electrically coupled to said controller (128, 128 ') temperature, to detect the temperature of the material that can flow in said conduit (82) adjacent to said sensor (122) and communicating said temperature to said controller (128); Y wherein said controller (128, 128 ') of temperature is electrically coupled with said generator three-phase (114) to selectively energize said generator (114) in response to said temperature detected by said sensor (122) to control the heating of said material that can flow in said conduit (82) to cause said generator (114) generate and supply three-phase electric current to said element heater (30) when energized. 4. The hot melt mix applicator of claim 2 or 3, wherein said flexible conduit (82) internal elongated and hollow construction comprises a wall side (84) of a generically cylindrical section and in which a Cord (30, 94) of the three-phase heating element is wound in spiral around at least a part of said conduit (82) with adjacent loops of said cord (30, 94) separated by a distance between 12.7 and 25.4 mm to produce a flow heater between approximately 0.3875 watts per centimeter square and 0.5425 watts per square centimeter. 5. The hot melt mix applicator according to any one of claims 2 to 4, wherein said Three-phase current is supplied to said heating element (30) at an electrical potential no greater than approximately 60 volts between any of the two phases to reduce the risk of electric shocks 6. The hot melt mix applicator according to any one of claims 2 to 5, wherein said dispenser (68) comprises a tubular dispensing unit (24) elongated and said three-phase heating element comprises a cord (30) which contains three conductors that each carries a phase of current, said cord being helically wound around of said dispensing unit (24) for heating the material that it can flow into said dispensing unit. 7. The hot melt mix applicator according to any one of claims 2 to 6, comprising furthermore a support frame (32) carrying said source (38) of material that can flow, said pump (48) and said source (114) of three-phase current and in which said electric current source three-phase comprises an internal combustion engine (52) that has an outlet in cooperation with a current generator (106) three phase alternating to supply an electric current three-phase to said conductors (30) of the heating element. 8. The hot melt mix applicator of claim 7, wherein said generator (114) supplies electric current directly to said heating element (30) without requiring neither an electric current regulator nor a regulator voltage to be in electrical communication with said generator (166) or said heating element (30). 9. The hot melt mix applicator of claim 7 or 8, wherein said generator (166) comprises a vehicle alternator (194) coupled to an output shaft of said motor (52). 10. The hot melt mix applicator of claim 9, wherein said alternator (194) lacks power electronic components to convert the current three-phase in a single-phase or continuous current. 11. The hot melt mix applicator of claim 1, wherein said dispenser (68) comprises a elongated tubular dispensing unit (24) coupled to said conduit (82) and said heating element conductors are wound spiraling around said dispensing unit according to substantially the length of said dispensing unit (24) for heating the material that can flow into said unit dispenser (24). 12. The hot melt mix applicator of claim 3, wherein said temperature sensor (122) is supported by said internal duct (82) and separated according to a distance of at least about 152.4 millimeters from said end of said hose (22, 22 ') to detect the temperature of said internal duct (82). 13. The hot melt mix applicator according to any one of claims 7 to 12, wherein said conductors (30) of the heating element are connected at one end to said three-phase generator (166) and each of the others to their opposite ends. 14. The hot melt mix applicator according to any one of claims 7 to 13, wherein said Three phase generator (106) has: (1) a rotor (170) connected to said heating element (30) for supplying electric current three phase to said heating element when said generator (166) It is energized and generates electrical power; (2) a stator (168) in  electrical communication with said temperature controller (128, 128 ') and said stator (168) has an output in communication with a platform of said rotor; and (3) wherein said rotor (170) and said stator (168) are constructed and arranged so that said controller (128, 128 ') energizes said generator (166), causing said generator (166) to generate and supply current three-phase electrical to said heating element (30), supplying said controller (128, 128 ') a control current from said output of said controller to said input of said stator. 15. The hot melt mix applicator according to any one of claims 7 to 14, comprising in addition: (1) a valve in cooperation with said speed of the engine to control engine speed; (2) a solenoid coupled to said valve; (3) a coupled temperature controller  electrically to said solenoid (222); (4) a sensor temperature (122) supported by said conduit (82) and coupled electrically to said temperature controller (128, 128 '), to detect the temperature of the material that can flow in said conduit (82) next to said sensor and communicating a signal electrical representative of said temperature to said controller; Y (5) wherein said controller controls the engine speed in response to the temperature detected by said sensor temperature to control the heating of said element heater (30). 16. The hot melt mix applicator according to any one of claims 7 to 14, comprising in addition: (1) a valve in cooperation with said speed of the engine to control engine speed; (2) a solenoid (222) coupled to said valve; (3) a temperature controller (128, 128 ') electrically coupled to said solenoid (222) and coupled electrically to said heating element (30) to detect the magnitude of the voltage or current of said heating element; (4) wherein said controller (128) controls the speed of the motor in response to the magnitude of said voltage or current detected to control the heating of said element heater. 17. The hot melt mix applicator according to any one of claims 1 to 16, wherein a set of connection elements (80, 80 ') is fixed to each end of said flexible internal duct (82 '). 18. The hot melt mix applicator according to any one of claims 1 to 17, wherein said outer cover (310) comprises a rubber side wall flexible of a generically cylindrical construction and a wire (314) steel reinforcement embedded within said side wall to prevent crushing and the formation of cocas in, said cover (310), internal duct (82) and tube (270). 19. The hot melt mix applicator of claim 17, wherein one end of said cover (310) is immovably fixed to one end of said assemblies (80, 80 ') of connection elements and the other end of said cover is immovably fixed to the other end of said sets of connection elements to transfer the hose connection from one of said sets of connection elements through said cover (310) to the other of said sets of elements of connection and away from said flexible internal duct (82). 20. The hot melt mix applicator according to any one of claims 1 to 19, wherein said tube (270) comprises a flexible metal tube that can be curved and compress axially manufactured from a single strip (274) of metal, elongated and interlocked helically and in which said tube is axially compressed within said flexible internal duct (82) when it is received inside said internal duct (82) flexible. 21. The hot melt mix applicator according to any one of claims 1 to 20, wherein said heating element (30) comprises three conductors (96, 98, 100, 102) which each carries a phase of three-phase electric current and each of said conductors is spirally wound around of said internal duct (82) flexible substantially the length axial of said conduit (82) to heat said conduit and the material that can flow into said tube (270). 22. The hot melt mixture applicator of claim 1, further comprising a frame (32) carrying said source (38) of heated flowing material and said pump (48), and wherein said source (114 ) of electric current comprises an internal combustion engine (52) supported by said frame (32) and having its output coupled to an alternator (194) electrically connected to each of said conductors (30) of the element

 \ hbox {heater.}