MANUAL SPRAYER FOR HORTICULTURE AND SIMILAR
DESCRIPTIVE MEMORY The present invention relates to a manual pulverizer applicable especially to horticulture and the like. The object of the present invention is to provide a sprayer with simple characteristics in its constitution, which allows economical manufacture and safe and durable handling. The structure of the sprayer object of the present invention is very simplified, combining a manually operated pump with a tank of considerable dimensions with total emptying capacity combined with a liquid outlet under pressure controlled by a slide valve operable by trigger and a nozzle of Single orifice spraying with coaxial liquid distribution. The manually operated pump has a considerable diameter, slightly smaller than the support body of the actuator valve assembly and spray nozzle and holding handle, which has a threaded coupling capability to the liquid carrier tank. One of the characteristics of the sprayer object of the present invention lies in its constitution by a very small number of pieces with geometrically very simple characteristics that allow to achieve very low manufacturing costs. Thus, for example, the main body is constituted fundamentally by a single piece that incorporates the cylinder of the manual pump in a single piece that also integrates the housing for the sliding valve and the support for the projection nozzle. In this way it is possible not only a cylinder of air impulsion of maximum dimensions, which allows to reduce the time of pumping to reach the working pressure, but also the manufacture of the body of the sprayer with a minimum of parts, which contributes to reduce manufacturing costs In summary, the sprayer is of the type that includes a reservoir for the liquid to be projected, with a manual pump for the supply of pressurized air to the inside of the reservoir, an outlet nozzle and an intermediate valve for controlling the passage of liquid towards the outlet nozzle, and is characterized by the embodiment of the sprayer body in a single piece of injection molding having an outer shell and an internal tubular element, so that the outer shell is associated with pressure with the upper part of the tank and the internal tubular body receives inside it the plunger of the manual pump of the sprayer, being formed in the upper front part of said body, a housing intended to receive a horizontal sliding valve actuated by trigger to control the spraying; as well as a receiving cylindrical expansion of the horizontal tubular body of said nozzle. The sprayer body extends on the opposite side to the nozzle in an expansion of ergonomic features to facilitate support of the hand at the time of use. The body receives in its upper part a cover that fits with the tubular element of the body, with the ergonomic rear projection thereof and with the horizontal tubular body of the nozzle, effecting its union by stapling at different points of its periphery. For better understanding, drawings of a sprayer made in accordance with the present invention are attached as explanatory but not limiting examples. Figure 1 shows a complete section of a sprayer made in accordance with the present invention. Figure 2 shows a sectional detail of the control and spray head. Figure 3 shows a cross section through the section plane indicated in Figure 1. Figure 4 shows a view of the lower face of the spray device. Figure 5 is a larger scale view representative of the actuation zone by trigger and liquid passage to the nozzle. Figure 6 shows a plan view of the sprayer with the top cover removed. Figures 7 to 12 show details of the clamping of the upper cover of the sprayer by stapling. As seen in the figures, the construction of the sprayer object of the present invention mainly comprises an intermediate body -1-, the lower tank
-2- intended to contain the liquid to be projected and a nozzle assembly -3- for spraying the liquid. The body -1- is made in one piece and comprises an outer shell -4- and an internal body -5- which is the cylinder of the air compression pump, inside which the compression piston -6- slides, also presenting said body -1- the housing -7- in the front part intended to receive the manual control valve and the front extension -27- intended to receive the tubular element -20- of liquid arrival to the nozzle. The piston -6- is integral with a long actuator rod -9- which in the upper part has a handle -10- molded anatomically, together with the piston rod itself, forming a single assembly of the displaceable pump inside. of the cylinder -5-. The rod 9 is preferably cross-shaped in cross section, as seen in FIG. 3. The structure of the upper end 10 is suitable for the ergonomic holding of the displaceable assembly of the air compression pump, presenting, for example, the rear part -11- eventually more elongated to allow an easy manual grip and the shape of the intermediate neck -12- also suitable for its better grip. Said unitary body -1- also has an expansion -13- designed to allow the ergonomic, comfortable and firm grip of the sprayer with only one hand which, in this way, on the one hand holds the sprayer on the body -1- with support on the hand in the expansion -13- and having the possibility of simultaneously operating the front trigger -14-, which is the one that drives the slide valve that gives way to the liquid. The cylinder -5- will present, as usual, the valve assembly to allow the entry of air from the outside towards the interior of the cylinder and from this towards the tank -2-, having been represented only, for the purposes of clarity, in the lower part of the tubular element -5-, an elastic non-return valve -15- of conventional design. The tank -2- is integrated by two component parts, one of them the upper part -16- and the other, the lower part -17- shows a cylindrical skirt with a lower edge -17'- support, which determines a surface lower stable to allow horizontal placement of said container and delimiting the central part -32- in the form of a spherical cap, with lower ribs -32'-. The lower part -17- is coupled to the lower part of the tank -2- by centering pins such as -50- and -51- and a firm joining system, for example, by adhesive, welding system or other. The part -16-, which forms the upper part of the tank -2-, internally has an expansion -18- capable of receiving under pressure the lower part of the intermediate body -4- of the sprayer. A sealing retainer -19- ensures the hermetic closing of said deposit. The assembly of the nozzle -3- has an internal cylindrical body -20- for conducting the liquid, equipped with a coaxial orifice -21- and having radial openings -22- in its front part, which communicate through slots with the single front outlet -24- of the spray jet. Said body -20- is surrounded frontally by the bushing -25-carrier of said exit opening -24- and which determines in its front part the cavity -26- in which the jets of liquid converge for turbulent mixing before leaving through the opening -24-. The body itself -20- is press-fitted into the cylindrical expansion -27- of the intermediate body and has o-ring seals -28- and -29- mounted near its ends for sealing against said outer sleeve. 25- and cylindrical expansion -27-. The passage of the liquid contained in the tank -2-to the nozzle body -3- is carried out by means of a tubular element -30- which is upperly pressed into a housing -31- made in the intermediate body -4- of the sprayer -1- and internally reaches the vicinity of the bottom -32- of the tank -2-. The control of the passage of the liquid between the tubular conduit -30- and the assembly of the nozzle -3- is carried out by means of a sliding valve -33- whose displacement is controlled by the trigger -14- manually operated, which in turn receives the antagonistic action of a helical spring -35-. In this way, when the action of the spring 35 expires, as in the position shown in FIGS. 1 and 2, the sliding valve 33, which has longitudinal grooves, goes to occupy a position in which the liquid coming from of the tube -30- can access an internal chamber -36- and along the slide valve -33- can pass into a communication chamber -38- in which the end of the hole -21- of the body is opened - 20- of the nozzle. an upper unitary cover -39- closes the entire upper part of the sprayer body, with multiple seaming points arranged as it is possible to observe in figure 6, in which they have been numbered with the numerals -40-, -41- , -42-, -43-, -44-, -45- and -46-, it being understood that the number and arrangement of said seaming points may be widely variable. As seen in the details of figures 7 to 12, in all the seaming points provision is made for the provision of hook-shaped projections in male-female arrangement, although, as will be understood, other types of profiles could be made of retaining by snap-fastening without this meaning leaving the scope of the present invention. The lid itself -39- presses a plug -52- for access to the chamber -38- which communicates the slide valve -33- and the tubular element -20- of liquid conduction towards the nozzle. By means of the described construction, the sprayer object of the present invention can be manufactured in a simple and economic way, with a very small number of pieces, with which the manufacturing costs decrease and in addition, a sensible increase of the functional and duration.