A JET-BLASTER DEVICE

Abstract: A jet-blaster device (2) especially for use by the application of preformed road markings and pavement maintenance works such as crack filling and other industrial applications such as epoxy injections for concrete slabs, said jet-blaster device (2) comprising a wheel supported frame system (4) provided with a supply gas bottle (12), a combustion engine being (14) drivingly connected with a fan (16), an outlet opening (17) of which being connected by means of a flexible hose (19) to a jet-blaster gun (18) comprising a gas heated burner system having an outlet nozzle (20). A modified jet-blaster may be adapted to be used in a preferable mobile apparatus for in-situ cleansing or purifying of contaminated material such as oil contaminated soil, which in-situ is filled into the apparatus and is passing a treatment zone or chamber being provided with a number of jet-blaster nozzles for burning or vaporizing the contaminations out from the passing soil, before the soil again in-situ is returned to its normal position.

Description: A Jet-Blaster Device. FIELD OF THE INVENTION The present invention relates to a jet-blaster device especially for use by the application of preformed road markings and pavement maintenance work such as crack filling and other industrial applications such as epoxy injections for concrete slabs. BACKGROUND OF THE INVENTION In order to provide different traffic markings on the surfaces of road pavements in an easier manner it is known to make use of prefabricated stripes and other signs made from thermoplastic or epoxy which for instance is marketed by the company Linear Dynamics Inc. under the trademark ThermaLine™. ThermaLine™ is a heat fused preformed thermoplastic pavement marking item specially designed for easy, year round application with the durability of hot applied thermoplastic and the excellent appearance of preformed plastic. Furthermore ThermaLine™ comes with a unique glassing system which will ensure the desired nighttime retroreflective and needed skid resistance for today's driving public. It is easy to apply and can be installed during all four seasons of the year. SUMMARY OF THE INVENTION According to the invention there is provided a jet-blaster device especially for use by the application of preformed road markings and pavement maintenance works such as crack filling and other industrial applications such as epoxy injections for concrete slabs, said jet-blaster device comprising a wheel supported frame system provided with a supply gas bottle, a combustion engine being drivingly connected with a fan, an outlet opening of which being connected by means of a flexible hose to a jet-blaster gun comprising a gas heated burner system having an outlet nozzle. Hereby is obtained an improved mobile jet-blaster device which especially is well qualified for the application of preformed road markings and pavement maintenance works such as crack filling and other industrial applications such as epoxy injections for concrete slabs. According to another aspect of the invention the jet-blaster device is provided as a pushcart with a cart pole at one end and the jet-blaster gun at the opposite end. Hereby the jet-blaster device appears as a compact mobile unit which is very easy to operate and requires very little free space. According to a further aspect of the invention the jet-blaster device is such provided that the jet-blaster gun is adapted to be mounted inclined and sidewardly adjusted in such a manner that the outlet nozzle of the jet-blaster gun may be directed against surface paths at both sides and at the front end of the pushcart. According to a still further aspect of the invention the jet-blaster may be such provided that the outlet from the jet-blaster gun is provided with a transverse directed mouthpiece which by way of example has a width of same magnitude as that of the pushcart. According to a still further aspect of the invention the mouthpiece may furthermore be adapted to be rotated in relation to the outlet nozzle of the jet-blaster gun so that the active working path of the jet-blaster device may easily be adjusted in accordance with the width of the preformed marking item in question. According to a still further aspect of the invention the jet-blaster device may be provided as a self-propelled unit comprising an electric drive motor being supplied with electric power from a generator which either is driven by the combustion engine or is a part of this. According to a still further aspect of the invention the jet-blaster device may be provided as a self-propelled unit by which said combustion engine is drivingly connected to the driving wheels and to a number of fans for a corresponding numbers of jet- blaster guns, the outlet nozzles of which ending in a common oblong heating box positioned close to the pavement surface. Furthermore the invention relates to a jet-blaster device being adapted to use in connection with a preferably mobile apparatus for in-situ cleansing or purifying of contaminated material such as oil contaminated soil, which in-situ is filled into the appa- ratus and is passing a treatment zone or chamber being provided with a number of jet- blaster nozzles for burning or vaporizing the contaminations out from the passing soil, before the soil again in-situ is returned to its normal position. BRIEF DESCRIPTION OF THE FIGURES Fig. 1 shows a side view of an embodiment of a jet-blaster device according to the invention, Fig. 2 shows a side view of the jet-blaster device shown in Fig. 1 - as seen from the opposite side, Fig. 3 shows the jet-blaster device shown in Figs. 1 and 2 during crack filling maintenance work of a floor construction, Fig. 4 shows another embodiment of a jet-blaster device according to the invention provided with a transverse mouthpiece during drying work of an asphalt pavement surface, Fig. 5 shows the jet-blaster device shown in Fig. 4 during heat application of a preformed marking stripe on an asphalt pavement surface, Fig. 6 shows a further embodiment of a larger self-propelling jet-blaster device according to the invention shown, Fig. 7 shows the jet-blaster device shown in Fig. 6 as seen from behind, and Fig. 8 shows a cross sectional view of a preferred embodiment of a gas heated burner system of the jet-blaster device according to the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The jet-blaster device 2 shown in Figs. 1 - 3 is constructed on a pushcart 4 with a cart pole 6 and stationary wheels 8 at one end and pivotal wheels 10 at the opposite end. On top of the stationary wheels 8 the pushcart 4 has a compartment for a supply gas bottle 12. At the opposite end of the pushcart 4 is mounted a combustion engine 14 which is drivingly connected to a fan 16, the exhaust opening 17 of which is connected by means of a flexible hose 19 to the top end of a jet-blaster gun 18, the outlet nozzle 20 of which is positioned close to a pavement surface 22. Gas from the gas bottle 12 is supplied through a hose 24 to a burner system 26 at the top end of the jet- blaster gun 18 (Fig. 8). The jet-blaster gun 18 is mounted inclined in relation to the front end of the pushcart 4 on a pivot socket 28 so that the outlet nozzle 20 of the jet-blaster gun 18 may easily be adjusted to take in any position at both sides of the pushcart 4 and at the front end thereof in order to make it possible to direct the outlet nozzle 20 of the jet-blaster gun 18 towards any possible pavement surface path during forward or rearward movement of the pushcart 4 - as for instance shown in Fig. 3, where the jet-blaster device 2 is used in connection with crack filling. By the jet-blaster device 2 shown in Fig. 4 the outlet nozzle 20 of the jet-blaster gun 18 is provided with a transverse mouthpiece 30 with a width of the same magnitude as that of the width of the pushcart 4. The mouthpiece 30 is furthermore pivotally connected to the outlet nozzle 20 of the jet-blaster gun 18 so that the active width of the mouthpiece 30 may be adjusted by turning it in relation to the outlet nozzle 20. In Fig. 4 the jet-blaster device 2 is used for drying a surface 32 of an asphalt pavement surface - for instance prior to applying a preformed marking item to the asphalt pavement surface 32 - as shown in Fig. 5. It should be mentioned that the jet-blaster device 2 shown in Figs. 1 -5 very easily may be made self-propelled by adding a driving motor which for instance may be an elec- trie driving motor being supplied with electric power from an generator driven by the combustion engine 14. A larger self-propelled jet-blaster device 34 shown in Figs. 6 and 7 is provided with 3 jet-blaster guns 18 connected to a common heating box 38 positioned close to an asphalt pavement surface 40 - during the work when applying preformed marking items to the surface of the asphalt pavement surface 40. Fig. 8 shows a cross sectional view of the jet-blaster gun 18 which at the top end is adapted to be connected with the flexible hose 19 from the fan 16. The jet-blaster gun 18 has a burner chamber 36 where a sparking plug 42 - as shown in the left hand side - is adapted to be screwed in and where the gas hose 24 from the supply gas bottle 12 is connected to a ball valve 44 - so that gas may be supplied to the burner chamber 36 through inlets 46 at both sides of the burner chamber 36. At the opposite end the jet- blaster gun 18 has an outlet nozzle 20 with an inclined cut end part 48. An outer mantle of the jet-blaster gun 18 is about the middle provided with a projecting support lever 50 by means of which the jet-blaster gun 18 may be mounted at the front end of the pushcart 4. The jet-blaster gun 18 may between the outer mantle and the inner tube be provided with high temperature insulation material (Kerlane) as the outlet tempera- ture of the hot air stream from the outlet nozzle is about 1200° C. Alternatively said cavity between the outer mantle and the inner tube is empty and provided with open ends so that cooling air may circulate through said cavity. As mentioned and stated above the jet-blaster device according to the invention may be used for quite different purposes where the general task is quickly to apply heat to materials. By way of example a modified jet-blaster device may be used in a mobile apparatus for cleansing or purifying contaminated material such as oil contaminated soil or sludge. The contaminated soil is excavated and preferably in-situ filled directly into the apparatus in which the contaminated soil is passing a treatment zone or cham- ber in which the contaminated soil is treated by means of a number of jet-blaster nozzles, so that the contaminations are burned or vaporized out from the soil. Afterwards the cleansed or purified soil is again returned to its normal position.

Claims: Claims: 1. A jet-blaster device especially for use by the application of preformed road markings and pavement maintenance works such as crack filling and other industrial applications such as epoxy injections for concrete slabs, said jet-blaster device comprising a wheel supported frame system provided with a supply gas bottle, a combustion engine being drivingly connected with a fan, an outlet opening of which being connected by means of a flexible hose to a jet-blaster gun comprising a gas heated burner system having an outlet nozzle. 2. A jet-blaster device according to claim 1 and provided as a pushcart with a cart- pole at one end and the jet-blaster gun at the opposite end. 3. A jet-blaster device according to claims 1 and 2 and by which the jet-blaster gun is adapted to be mounted inclined and adjustable in such a manner that the outlet nozzle of the jet-blaster gun may be directed against surface paths at both sides and at the front end of the pushcart. 4. A jet-blaster device according to claims 1 and 2 and by which the outlet from the jet-blaster gun is provided with a transverse directed mouthpiece which by way of example has a width of same magnitude as that of the pushcart. 5. A jet-blaster device according to claim 4 by which said mouthpiece furthermore may be adapted to be rotated in relation to the outlet nozzle of the jet-blaster gun so that the active working path of the jet-blaster device may easily be adjusted in accordance with the width of the preformed marking item in question. 6. A jet-blaster device according to claim 1 and provided as a self-propelled unit comprising an electric drive motor being supplied with electric power from a generator which either is driven by the combustion engine or is a part of this. 7. A jet-blaster device according to claim 1 and provided as a self-propelled unit by which said combustion engine is drivingly connected to the driving wheels and a number of fans for a corresponding number of jet-blaster guns, the outlet nozzles of which ending in a common oblong heating box positioned close to the pavement sur- face. 8. A jet-blaster device according to claim 1 and being adapted to use in connection with a preferably mobile apparatus for in-situ cleansing or purifying of contaminated material such as oil contaminated soil, which in-situ is filled into the apparatus and is passing a treatment zone or chamber being provided with a number of jet-blaster nozzles for burning or vaporizing the contaminations out from the passing soil, before the soil again in-situ is returned to its normal position.

Inventors: ZACHO BO RAVNSBAEK, ZACHO, BO, RAVNSBAEK
Applicants: ZACHO BO RAVNSBAEK, ZACHO, BO, RAVNSBAEK
Application year: 2000
Main classification: E01C23
IPC codes: B09C1, E01C23, F23G7