Abstract:
A firefighting nozzle that will generate a spray of water in a 360° three-dimensional pattern, giving off a big sphere of fine droplets of water is disclosed herein. The nozzle has a hollow spherical portion rotatably mounted to the end of a rigid tube. Apertures are formed in such a pattern that an efficient mist production is achieved. Furthermore, some of the apertures are provided at such an angle that the water jets exiting these apertures exert a torque sufficient to rotate the nozzle with respect to the rigid tube to which it is mounted. The nozzle may be mounted to the end of a hand carried rigid tube or to the end of an articulated arm of a firefighting truck.

Description:
FIELD OF THE INVENTION 
     The present invention relates to firefighting equipment. More specifically, the present invention relates to an improved nozzle capable of delivering a huge quantity of water, in a fine spray, directly inside a blazing building. 
     BACKGROUND OF THE INVENTION 
     Firemen risk their lives fighting the blaze, often with questionable success. At the high end of a truck-mounted ladder, when a fireman aims a conventional nozzle at a blaze, he can hardly see the blaze because of the thick black smoke coming out of the building. The conventional nozzle, which is so mounted to the ladder as to swivel therefrom, is aimed at the blaze by the fireman and can deliver a huge flow of water. The water jet must be dense since it must span the safe distance to be kept between the fireman and the blaze and must reach the building opening the fireman is aiming at. 
     Unfortunately, most of the water from the jet usually bounce on a wall opposite the opening or on the ceiling and come right back down, in the basement, through a staircase or an elevator shaft. This is unfortunate since the water that does not contact the portions of the building that are burning does not contribute to the extinguishing of the fire. 
     Other firemen of the same squad, at the same time, are likely to try to approach the blazing building at ground level. They use hand-held nozzles, necessarily much less powerful because of the recoil created by the ejected jet of water, but more efficient, up to a certain point, because their stream can be manually adjusted so as to deliver a larger spread of fine droplets. But one cannot easily come close to a blazing building without taking serious risks: objects, even walls, can fall on the firemen, or at other moments they can get choked by the smoke. 
     In either case, the tools the firefighters are conventionally using are not particularly well suited to achieve what is expected from them. 
     An improvement in firefighting nozzles has been brought forward by Leo J. Grzych in his U.S. Pat. No. 4,700,894 issued on Oct. 20, 1987. In this document, Grzych describes a fire nozzle forming a generally sphere-like water spray pattern. Grzych&#39;s fire nozzle assembly presents many drawbacks. First, it is formed of many mechanical pieces that are complicated, and therefore costly, to make. Furthermore, since there is no movement of the water jets created by the nozzle, problems arise should some of the apertures become clogged by foreign matter. Indeed, should that be the case, the sphere-like water spray pattern would be altered and some portions of the room would not get any water. 
     OBJECTS OF THE INVENTION 
     An object of the present invention is therefore to provide an improved nozzle, for fighting fires in buildings, free of the above-noted drawbacks of the prior art. 
     SUMMARY OF THE INVENTION 
     More specifically, in accordance with the present invention, there is provided a nozzle for fighting fires configured to be mounted to the end of a rigid tube; the nozzle comprising: 
     a rotatable coupling assembly including a fixed element to be mounted to the end of the rigid tube and a rotatable sub-assembly so mounted to the fixed element as to rotate about a rotation axis generally aligned with the rigid tube; the rotatable sub-assembly including a nozzle head receiving element provided with an opening coaxial with the rotation axis; 
     a nozzle head mounted to the nozzle head receiving element of the rotatable coupling assembly; the nozzle head having a hollow generally spherical portion defining an inner surface and an inlet open to the rigid tube; the spherical portion having a) at least two torque generating jet apertures formed therein at an angle and b) at least two colliding jet apertures; 
     wherein when water pressure is applied to the rigid tube i) at least two torque generating jets exit the nozzle head at an angle to induce a rotational movement of the nozzle head about the rotation axis, ii) at least two colliding jets exit the nozzle, iii) each colliding jet collides with a corresponding torque generating jet to divide each torque generating jet into a plurality of smaller jets. 
     According to another aspect of the present invention, there is provided a nozzle for fighting fires configured to be mounted to the end of a rigid tube; the nozzle comprising: 
     a rotatable coupling assembly so mounted to the end of the rigid tube as to rotate about a rotation axis generally aligned with the rigid tube; the rotatable coupling including a nozzle head receiving element provided with an opening coaxial with the rotation axis; 
     a nozzle head mounted to the nozzle head receiving element of the rotatable coupling assembly; the nozzle head having a hollow generally spherical portion defining an inner surface and an inlet open to the rigid tube; the spherical portion having a) at least two torque generating jet apertures formed therein at an angle each generating, when water pressure is applied, torque generating jets at an angle to induce a rotational movement of the nozzle head about the rotation axis, and b) at least two colliding jet apertures; each colliding aperture being so positioned as to generate, when water pressure is applied, a colliding jet that collides with a corresponding torque generating jet to divide each torque generating jet into a plurality of smaller jets. 
     Other objects, advantages and features of the present invention will become more apparent upon reading of the following non restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the appended drawings: 
     FIG. 1 is a sectional side elevational view of a nozzle according to an embodiment of the present invention; 
     FIG. 2 is a sectional view taken along line  2 — 2  of FIG. 1; 
     FIG. 3 is a schematic perspective view of the nozzle of FIG. 1 where four types of openings are schematically provided; and 
     FIG. 4 is a perspective view illustrating the nozzle of FIG. 1 mounted at the end of a rigid tube and introduced in a room through a window. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENT 
     The general concept of the present invention is to provide a fire fighting instrument that can bring onto the blaze a huge stream of water that would be, by heat transfer, very quickly converted to water vapor. This quick conversion from water to vapor would expel all available air that would, otherwise, be used to sustain the combustion, and cool both the blazing material and the inflammable vapors released by other combustible materials that had reached, or were about to reach, their flash point. 
     It has been found that the above general concept of the present invention may be obtained by providing a nozzle that can generate a spray of very fine droplets of water, this over 360° in a three-dimension pattern, with a reach great enough to fill efficiently a very large room. 
     While it is an advantageous feature to provide a nozzle that may be configured and sized to be mounted to the end of an articulated arm of a firefighting truck, the present invention relates only to the nozzle, a truck-mounted articulated arm being already a conventional piece of equipment used extensively for many purposes. 
     Turning now to FIGS. 1 to  3  of the appended drawings, a nozzle  10  according to an embodiment of the present invention will be described. 
     The nozzle  10  includes a rotatable coupling assembly  12 , configured and sized to be mounted to the end of a rigid tube  14 , and a nozzle head  16  removably mounted to the rotatable coupling assembly  12 . 
     The rotatable coupling assembly  12  includes a fixed toroidal element  18  provided with internal threads  20  allowing it to be screwed onto external threads  22  of the tube  14 . A rotatable sub-assembly  24  of the coupling assembly  12  includes a nozzle head receiving element  26  and a peripheral element  28  configured and sized to be mounted to the head receiving element  26  via fasteners  30 . 
     The rotatable sub-assembly  24  is mounted to the fixed toroidal element  18  via first and second sets of ball bearings  32  and  34 . More specifically, the first set of ball bearings  32  is provided peripherally between a concave portion  36  of the fixed element  18  and a concave portion  38  of the head receiving element  26 ; and the second set of ball bearings  34  is provided peripherally between a concave portion  40  of the fixed element  18  and a concave portion  42  of the peripheral element  28 . 
     Of course, the purpose of the ball bearings  32  and  34  is to decrease the friction between the tube  14  and the nozzle  10  to thereby decrease the force required to rotate the nozzle  10 . It is to be noted that other friction reducing means could be used. 
     As can be seen in FIG. 1, the nozzle head receiving element  26  includes a central cylindrical aperture having an internally threaded portion  44  and a taper portion  46 . A seal gasket  48  is provided between the element  26  and the end of the tube  14  to prevent water from leaking therebetween. The seal gasket  48  includes a peripheral lip  49  that is in contact with the taper portion  46 . As will be apparent to one skilled in the art, the water pressure will adequately seal the lip  49  to the taper portion  46 . The gasket  48  is advantageously made of nylon which is a wear resistant sealing material. 
     It is to be noted that should the ball bearings  32  and  34  be water lubricated, the gasket  48  would not be required, but a gasket (not shown) would be required between the tube  14  and the peripheral element  28  thereby allowing water to lubricate the ball bearings. 
     The nozzle head  16  is made of two identical half-shells  50  and  52  that may be assembled using fasteners (not shown) or adhesives (not shown). Of course, the nozzle head  16  could be made of a single element. 
     When assembled, the half-shells  50  and  52  define the nozzle head  16  having a generally spherical nozzle portion  54  and an integral generally cylindrical mounting portion  56 . 
     The mounting portion  56  is provided with a threaded external surface  58  configured and sized to cooperate with the internally threaded surface  44  of the nozzle head receiving element  26  to thereby mount the nozzle head  16  to the rotatable coupling assembly  12 . The internal surface  60  of the mounting portion  56  defines a converging-diverging water passage between the rigid tube  14  and the spherical nozzle portion  54  to help distribute a more even pressure of the incoming water within the spherical nozzle portion  54 . 
     It is to be noted that the slope of the converging portion of the internal surface  60  is similar to the slope of the taper portion  46  of the head receiving element  26  to thereby prevent the flow of water to be interfered with. 
     The spherical nozzle portion  54  is hollow and is provided with a suitable thickness to withstand the important flow of water therein as will be described hereinafter. The nozzle portion  54  therefore has an internal surface  62 . 
     The spherical nozzle portion  54  is provided with a plurality of apertures defining a plurality of water outlets. More specifically, the nozzle portion  54  is provided with four different types of apertures: 
     torque generating jet apertures; 
     colliding jet apertures; 
     spray carrying jet apertures; and 
     spray generating jet apertures. 
     It is to be noted that, for clarity purposes, only the torque generating apertures and the colliding jet apertures are shown on FIG.  1 . The other types of apertures will be further described hereinbelow with respect to FIG.  4 . 
     The nozzle portion  54  is provided with ten (10) torque generating jet apertures (only five shown)  100   a - 100   e;  and ten (10) corresponding colliding jet apertures (only five shown)  102   a - 102   e.    
     The relationship between the torque generating jet apertures  100  and the colliding jet apertures  102  is better seen from FIG. 2, which is a sectional view of FIG. 1 taken along the “equator” thereof. 
     As can be better seen from this Figure, the torque generating aperture  100   a,  and its diametrally opposite torque generating aperture  100   a ′, are so formed in the nozzle  54  that they are tangent from the internal surface  62  of the nozzle  54 . It is to be noted that the torque generating jet apertures  100  are countersunk from the outer surface. This feature facilitate the construction by providing a small flat surface where the small orifice of the torque generating aperture may be drilled. This feature also improves the hydraulic performances of the torque generating jets by ensuring flow separation from the boundaries when they leave the aperture. Indeed, the countersunk portion of the torque generating jet apertures  100  ensures that, while the torque generating jets are tangential to the inner surface  62 , they are also perpendicular to their immediate outer surface. 
     It is also to be noted that the torque generating jet apertures could be so formed in the nozzle  54  as to define another angle, as long as this angle is adequate to generate jets that bring the nozzle head  16  in rotation when water pressure is applied. 
     The colliding jet apertures  102 , on the other hand, are perpendicular to the internal surface  62  of the nozzle  54 . They are so positioned that each waterjet leaving one of these apertures will forcefully collide with the torque generating jet leaving the corresponding torque generating aperture. In other terms, the axis of each colliding jet aperture intersect the axis of the corresponding torque generating jet aperture. Furthermore, the angle of collision between these two jets is about 45°. For example, the torque generating jet (see arrow  104 ) leaving aperture  100   a  is forcefully hit by the colliding jet (see arrow  106 ) leaving the colliding jet aperture  102   a,  resulting in a plurality of smaller jets (see arrows  108 ). Of course, the water jets are schematically illustrated in FIG.  2 . 
     It is to be noted that the colliding jet apertures  102  could be so formed as to be at an angle with respect to the inner surface  62  of the spherical nozzle portion  54 , as long as this angle is such that a) the colliding jets generated, when water pressure is applied, collide with corresponding torque generating jets and b) the colliding jets do not create a torque that opposes the torque generated by the torque generating jets. 
     The purpose of the torque generating jet apertures  100  is to generate strong tangentially directed jets to induce a rotational movement of the spherical nozzle portion  54  about a rotation axis  64  (see arrow  66 ) when water pressure is applied to the nozzle  10  via the tube  14 . Indeed, since all the torque generating apertures  100  generate water jets having a component that is parallel with the “equator”, a torque is produced and rotation of the spherical nozzle portion  54  about axis  64  occurs. 
     However, for the present application, strong and far reaching jets, such as the torque generating jets describe hereinabove, are not particularly desirable. Therefore, each tangentially directed jet from one of the torque generating jet apertures  100  is forcefully hit by an equally strong, radially directed jet from one of the colliding jet apertures  102 . The result of each one of those pairs of 45° colliding jets is a generally delta-shaped water spray that will add to the spray given off by the other radially perforated apertures, as will be described hereinbelow. 
     The rotational movement of the spherical nozzle portion  54  about a rotation axis  64  further contributes to the peripheral distribution of the spray. Also, should some apertures become clogged by foreign matter, the rotation of the nozzle portion  54  will ensure that water is evenly distributed throughout the room. 
     Turning now to FIG. 3 of the appended drawings, which is a schematic perspective view, the position of the four types of apertures of the spherical nozzle portion  54  will be described. 
     As described hereinabove, the first type of apertures is referred to as torque generating jets apertures  100 . These apertures appear as circles () in FIG.  3 . The diameter of these apertures is about 0,12 inches (about 0.003 meters), while the diameter of the countersunk portion of these apertures is about 0,25 inches (about 0,006 meters). 
     The positions of the various apertures of the spherical nozzle portion  54  will be given hereinbelow with respect to their latitude and longitude. The reference aperture is the aperture  100   a,  which is considered to be at a latitude of 0° and a longitude of 0°. It is also to be noted that the position of the apertures will be given with respect to the internal surface  62  of the spherical nozzle portion  54 . 
     The following table 1 gives the position of the ten (10) torque generating jet apertures. 
     
       
         
               
             
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 1 
               
             
             
               
                   
               
               
                 Position of the torque generating jet apertures 
               
             
          
           
               
                   
                 Latitude (XX° XX′) 
                 Longitude (YY° YY′) 
               
               
                   
                   
               
             
          
           
               
                   
                   
                 00 
                 00 
                   
                 00 
                 00 
               
               
                   
                 N 
                 45 
                 00 
                   
                 00 
                 00 
               
               
                   
                 S 
                 45 
                 00 
                   
                 00 
                 00 
               
               
                   
                 N 
                 22 
                 30 
                 E 
                 90 
                 00 
               
               
                   
                 S 
                 22 
                 30 
                 E 
                 90 
                 00 
               
               
                   
                   
                 00 
                 00 
                   
                 180 
                 00 
               
               
                   
                 N 
                 45 
                 00 
                   
                 180 
                 00 
               
               
                   
                 S 
                 45 
                 00 
                   
                 180 
                 00 
               
               
                   
                 N 
                 22 
                 30 
                 W 
                 90 
                 00 
               
               
                   
                 S 
                 22 
                 30 
                 W 
                 90 
                 00 
               
               
                   
                   
               
             
          
         
       
     
     As described hereinabove, the second type of apertures is referred to as colliding jets apertures. These apertures appear as squares (▪) in FIG.  3 . The diameter of these apertures is about 0.12 inches (about 0,003 meters). 
     As mentioned above, each one of the colliding jets will collide at a 45° angle with a corresponding torque generating jet discharging at approximately the same rate; the resultant will be a fan-shaped spray pattern, extending away from the sphere and in a plane perpendicular to the one containing the two colliding jets. 
     The following table 2 gives the position of the ten (10) colliding jet apertures. 
     
       
         
               
             
               
               
               
             
               
               
               
               
               
               
               
             
           
               
                 TABLE 2 
               
             
             
               
                   
               
               
                 Position of the colliding jets 
               
             
          
           
               
                   
                 Latitude (XX° XX′) 
                 Longitude (YY° YY′) 
               
               
                   
                   
               
             
          
           
               
                   
                   
                 00 
                 00 
                 E 
                 45 
                 00 
               
               
                   
                 N 
                 30 
                 00 
                 E 
                 54 
                 45 
               
               
                   
                 S 
                 30 
                 00 
                 E 
                 54 
                 45 
               
               
                   
                 N 
                 15 
                 43 
                 E 
                 137 
                 15 
               
               
                   
                 S 
                 15 
                 43 
                 E 
                 137 
                 15 
               
               
                   
                   
                 00 
                 00 
                 W 
                 135 
                 00 
               
               
                   
                 N 
                 30 
                 00 
                 W 
                 125 
                 15 
               
               
                   
                 S 
                 30 
                 00 
                 W 
                 125 
                 15 
               
               
                   
                 N 
                 15 
                 43 
                 W 
                 42 
                 45 
               
               
                   
                 S 
                 15 
                 43 
                 W 
                 42 
                 45 
               
               
                   
                   
               
             
          
         
       
     
     The third type of aperture is referred to as a spray carrying jet aperture. The purpose of these apertures is to generate relatively strong jets of water which will carry over the sprays generated by the collision of the torque generating jets and the colliding jets and the spray generated by the spray jets, to make them span a greater distance. 
     The spray carrying jet apertures appear as triangles (▴) in FIG.  3 . The diameter of these apertures is about 0,08 inches (about 0,002 meters). 
     It is to be noted that the carrying apertures are mainly concentrated near the “poles” of the spherical nozzle portion  54  while the other relatively strong jets, i.e., torque generating jets and colliding jets, are more towards the “equator” of nozzle  54 . 
     The following table 3 gives the position of the eighty one (81) carrying jet apertures. 
     
       
         
               
             
               
               
             
               
               
               
               
             
           
               
                 TABLE 3 
               
             
             
               
                   
               
               
                 Position of the carrying jet apertures 
               
             
          
           
               
                 Latitude (XX° XX′) 
                 Longitude (YY° YY′) 
               
               
                   
               
             
          
           
               
                 N 
                 90 
                 00 
                 (north pole) 
               
               
                 N 
                 85 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 80 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 N 
                 75 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 75 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 N 
                 70 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 70 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 N 
                 60 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 60 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 N 
                 50 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 50 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 N 
                 10 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 N 
                 10 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 S 
                 10 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 S 
                 10 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 S 
                 50 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 S 
                 50 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 S 
                 55 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 S 
                 55 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                 S 
                 60 
                 00 
                 E 45 00; E 135 00; W 135 00; W 45 00 
               
               
                 S 
                 60 
                 00 
                 00 00; E 90 00; 180 00; W 90 00 
               
               
                   
               
             
          
         
       
     
     The fourth and final type of aperture is referred to as a spray generating jet aperture. The purpose of these numerous apertures is to generate a plurality of spray generating jets made of fine droplets of water to form a mist about the nozzle  10 . As mentioned hereinabove, portion of this mist is carried by the carrying jets, to make them span a greater distance. 
     The spray generating jet apertures appear as asterisks (*) in FIG.  3 . The diameter of these apertures is about 0,04 inches (about 0,001 meters). 
     The following table (table 4) positions the spray generating jet apertures onto the inner surface  62  of the spherical nozzle portion  54 . It is to be noted that, for concision purposes, only the apertures provided in the first quadrant (from longitude 0° to longitude 89° ) is included in table 4. It is believed within the reach of one skilled in the art to reproduce this first quadrant in the other quadrants. 
     
       
         
               
             
               
               
             
               
               
               
               
             
           
               
                 TABLE 4 
               
             
             
               
                   
               
               
                 Position of the spray generating jets 
               
             
          
           
               
                 Latitude (XX° XX′) 
                 Longitude (YY°) 
               
               
                   
               
             
          
           
               
                 N 
                 87 
                 30 
                 00; E 45 
               
               
                 N 
                 85 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 80 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 75 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 70 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 65 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 60 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 55 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 50 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 N 
                 40 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 35 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 30 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 25 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 20 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 15 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 10 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 N 
                 5 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 5 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 10 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 15 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 20 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 25 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 30 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 35 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 40 
                 00 
                 00; E 15; E 30; E 45; E 60; E 75 
               
               
                 S 
                 50 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 S 
                 55 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                 S 
                 60 
                 00 
                 E 15; E 30; E 60; E 75 
               
               
                   
               
             
          
         
       
     
     It is to be noted that should any one of the spray generating apertures listed in table 4 interfere with one of the apertures listed in the first three tables, the spray generating aperture will give way. 
     The rated capacity of the nozzle  10  of the present invention, that is the rate of flow of the water to be spread over a fire, must be suited to various needs. It is therefore obvious that the diameter of the feeding pipe and the diameter of the sphere, as well as the number of apertures, their diameter and their pattern, have to be designed accordingly and these are variables that affect this invention. Consequently, it will be appreciated by one skilled in the art that numerous changes and modifications can be made to the nozzle  10  illustrated in FIGS. 1-3 without departing from the spirit and nature of the present invention. 
     Turning now our attention to FIG. 4 of the appended drawings, which illustrates the nozzle  10  mounted to the tube  14 , the general operation of the nozzle  10  will be described. 
     The nozzle  10  is shown introduced in a room  200  via a window  202 . 
     The water coming from the tube  14  (see arrow  204 ) forcefully leaves the nozzle  10  via the plurality of apertures. The torque generating jets cause the rotation of the rotatable portion of the nozzle (see arrow  206 ). This rotation will cause a generally equal amount of water to reach the four walls, the ceiling and the floor. 
     It is to be noted that the tube  14  is advantageously the last and upper linkage of an articulated arm. Of course, the tube  14  could also be hand held by a fireman. 
     It is also to be noted that the nozzle  10  of the present invention could also be used to spray a fire extinguishing foam. 
     Although the present invention has been described hereinabove by way of preferred embodiments thereof, it can be modified, without departing from the spirit and nature of the subject invention as defined in the appended claims. As non-limiting examples, the nozzle head  16  could be made of an integral piece or it could be fixedly mounted to the nozzle receiving element  26 .