Patent Publication Number: US-6341737-B1

Title: Pistol nozzle

Description:
FIELD OF THE INVENTION 
     The present invention relates generally to a water sprinkling device, and more particularly to a pistol nozzle. 
     BACKGROUND OF THE INVENTION 
     As shown in FIG. 1, a prior art pistol nozzle  01  is provided at the front end with a water inlet  02 , which is joined by a nozzle cover  03 . Located between the water inlet  02  and the nozzle cover  03  is a water emission piece  05  which is provided with a plurality of water emission holes  06 . The nozzle cover  03  is provided with a water outlet  06  from which the water is emitted. 
     Such a prior art pistol nozzle as described above is defective in design in that the water can not be emitted in various fashions, and that the flow of water is not stable, and further that it is not provided with a leakproof means to prevent the water leak. 
     SUMMARY OF THE INVENTION 
     The primary objective of the present invention is to provide pistol nozzle which is free from the drawbacks of the prior art pistol nozzle described above. 
     The features and the advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of a preferred embodiment of the present invention with reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 shows an exploded view of a pistol nozzle of the prior art. 
     FIG. 2 shows an exploded view of a pistol nozzle of the present invention. 
     FIG. 3 shows a front view of a rotary cover of the present invention. 
     FIG. 4 shows a sectional view taken along the direction indicated by a line A—A as shown in FIG.  3 . 
     FIG. 5 shows a front plan view of a water distribution disk of the present invention. 
     FIG. 6 shows a sectional view taken along the direction indicated by a line A—A as shown in FIG.  5 . 
     FIG. 7 shows a front plan view of a water emission disk of the present invention. 
     FIG. 8 shows a sectional view taken along the direction indicated by a line A—A as shown in FIG.  7 . 
     FIG. 9 shows a sectional view of the present invention in combination. 
     FIG. 10 shows a schematic view of a water passage of the present invention. 
     FIG. 11 shows a schematic view of another water passage of the present invention. 
     FIG. 12 shows a schematic view of a water slot and a large water outlet opposite to the water slot of the present invention. 
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     As shown in FIGS. 2-8, a pistol nozzle embodied in the present invention is formed of a protective cover  10 , a multi-stepped rotary cover  20 , a water distribution disk  30 ,a water discharging disk  40 , and a water admission head  50 . 
     The protective cover  10  is joined with the rotary cover  20  such that the rotary cover  20  is actuated by the protective cover  10  to turn in a multi-stepped fashion. 
     The rotary cover  20  is provided in the center with an axial hole  21  and is further provided with a plurality of water emission holes  22  and meshes  23 . 
     The water distribution disk  30  is provided with a center hole  31  and a plurality of locating slots which are equidistantly arranged along the peripheral edge of the water distribution disk  30 . 
     The water discharging disk  40  is provided with a center hole  41 . 
     The water admission head  50  is provided in the center with a shaft rod  51  which is provided with a water distribution duct  52 . The head  50  is fastened with the barrel of a pistol nozzle. 
     The present invention is characterized by the rotary cover  20 , which is provided in the water emission holes  22  with a hollow water emission pillar  221 , a notch  222  disposed at the front end of three water emission pillars  221  which are not adjacent to one another, and a rib wall  223  disposed between two water emission pillars  221  such that the rib wall  223  and the water emission pillars  221  form together a closed space. In addition, the water distribution disk  30  is provided with a large water distribution hole  32 , a small water distribution hole  34 , and a plurality of intermediate water distribution holes  33  corresponding in location to the water emission holes  22  of the rotary cover  20 . The water distribution disk  30  is further provided with a water slot  35  which is concentric with the large water distribution hole  32 , as shown in FIG.  6 . The water discharging disk  40  is provided with a large water discharging hole  42 , an intermediate water discharging hole  43 ,and a small water discharging hole  44 , which are respectively concentric with the large water distribution hole  32 , the intermediate water distribution hole  33 , and the small water distribution hole  34  of the water distribution disk  30 . The center hole  41 , the large water discharging hole  42 , the intermediate water discharging hole  43 , and the small water discharging hole  44  are respectively provided with a hollow protrusion  45  which circumvents the respective hole, as shown in FIG.  8 . 
     As shown in FIG. 9, the water distribution disk  30  is fastened in the rotary cover  20  by an ultra-sonic technique such that the water emission pillars  221  are inserted into the intermediate water distribution holes  33 . The water discharging disk  40  is fastened with the water admission head  50  by the ultra-sonic technique such that the water discharging holes  42 ,  43  and  44  of the water discharging disk  40  are located at the outside of the water distribution duct  52 . The protective cover  10  is joined with the rotary cover  20 . A screw is receiver in the axial hole  21  to force an O-ring  46  in the hollow protrusion  45  to press against the water distribution disk  30  so as to prevent the water leak. The head  50  is provided with a locating pillar  53 , which is received in the locating slot  36  of the water distribution disk  30 . 
     As shown in FIGS. 10 and 11, the rotary cover  20  is rotated such that a water emission hole  22  of a desired shape is attained, When the rotary cover  20  is turned such that the large water distribution hole  32  of the water distribution disk  30  is aligned with the large water discharging hole  42  of the water discharging disk  40 , the water current is guided into the external space of the water emission pillars  221  such that the water is emitted via the meshes  23 . As the rotary cover  20  is turned again such that the intermediate water distribution hole  33  is aligned with the intermediate water discharging hloe  43  of the water discharging disk  40 , the water current is guided into the water emission pillars  221  such that the water is emitted via the water emission holes  22 . Once again, the rotary cover  20  is turned such that the small water distribution hole  34  is aligned with the small water discharging hole  44  of the water discharging disk  40 , thereby enabling the water current to enter the closed space formed by the rib wall  223  and the water emission pillars  221  before the water current is guided into the water emission pillars  221  via the notch  222 . The water is thus emitted at the same time via the three water emission pillars  221 . The rotary disk  20  is further turned such that the water slot  35  of the water distribution disk  30  is aligned with the large water discharging hole  42  of the water discharging disk  40 , the water current enters the water slot  35  before entering the space located the protrusions  45 , as shown in FIG.  12 . As a result, the water is emitted at the same time via the large water distribution hole  32 , the intermediate water distribution hole  33 , and the small water distribution hole  34 . 
     In light of the water distribution disk being provided with three water distribution holes of different sizes, the water is emitted in various figures and amounts. In addition, the holes of the water distribution disk and the water discharging disk of the present invention are concentric, the water is emitted with precision in a desired manner. In addition, the present invention is provided with the water slot enabling the water to be distributed swiftly on the water distribution disk, thereby enabling the present invention to emit water stably in a desired amount. 
     The embodiment of the present invention described above is to be regarded in all respects as being merely illustrative and not restrictive. Accordingly, the present invention may be embodied in other specific forms without deviating from the spirit thereof. The present invention is therefore to be limited only by the scopes of the following appended claims.