MXPA99009635A - Pump supplier and my manufacturing method - Google Patents

Abstract

The present invention relates to a pump jet characterized in that it comprises a unitary molded pump body in one piece and box, the box is defined by a pair of spaced apart side walls and an upper wall and inclined rear wall attached to the side walls, a vertically disposed tubular support and pump cylinder spaced from the side walls and unitary with and meeting the upper wall, the interior of the side walls each being formed with channels similar to the inwardly extending box, the channels being front and parallel to the pump cylinder and arranged opposite each other, the channels are formed with internal coaxial trigger bolts

Description

PUMP SUPPLIER AND MANUFACTURING METHOD OF THE SAME Field of the invention This invention is concerned with a pump spout (or dispenser) and method of manufacture thereof. More specifically, the invention is concerned with a one-piece pump body and box of such dispenser and a process for molding it into a simple two-part mold.

BACKGROUND OF THE INVENTION In Foster Patents 5,590,834 and 5,656,227, a pump-and-box-type dispenser (or dispenser) is described as being molded in one piece. It requires a mold of three parts. The present invention undertakes the development of a one-piece dispenser or dispenser of the general type as that described in the McKinney patent 4,161,288 issued on July 17, 1979. This ubiquitous and well thought-out dispenser in the industry has as a characteristic a box of two pieces comprising a box top and a bottom or box bottom enclosing a tubular pumping chamber / support and supply tube. The trigger is hinged to the bottom of the box in a slot by bolts arranged on opposite side walls of the slot. The present invention consists of a one-piece product and a process wherein the trigger bolts, supply tube REF .: 31825, pumping chamber, tubular support and outer box are all molded in a simple two-part mold.

BRIEF DESCRIPTION OF THE INVENTION The invention is defined in the claims appended hereto. In summary, the invention is concerned with a one-piece molded body and box for a pump pump or dispenser, the box comprising a pair of spaced side walls and an upper wall. A vertical tubular support and pumping cylinder are both spaced apart from the side walls and meet the upper wall. A plurality of transverse reinforcements extending between the side wall reinforce the structure, a supply tube extending forwardly from an upper portion of the pumping cylinder and spacing of the upper wall. Box-like channels are formed on the inside of the side walls and support coaxial trigger bolts separating them from the side walls. The pump body and housing are formed in a simple two-part mold including sheets that extend through the upper wall of the box to form the upper wall of the supply pipe. Additional sheets extend to form the channels and trigger bolts in cooperation with mold surfaces of the lower half of the mold. The inside of the tubular support and b.omba cylinder are formed by a cylindrical surface on the lower mold half . The lower half also forms the exterior of the tubular support and spaced cylinder of the inner surface of the side walls. A retractable central bolt extends inward horizontally to meet the cylindrical surface and form the interior of the supply pipe.

BRIEF DESCRIPTION OF THE DRAWINGS Additional objects and advantages of the invention will be clear to those skilled in the art from a review of the following specification and drawings, all of which have a non-limiting form of the invention. In the drawings: Figure 1 is a perspective view of a pump and box dispenser body and box that implement the invention. The complementary parts are shown in dashed lines; Figure 2 is a sectional view taken on the line 2-2 on the center line of Figure 1; Figure 3 is a sectional view taken on line 3-3 of Figure 1; Figure 4 is an enlarged bottom plan view; Figure 5 is an enlarged section comparable with Figure 2 showing the part of the dispenser in its mold and showing the parts of the mold also in section; Figure 6 is an enlarged section comparable to Figure 3 showing the part of the spout in its mold and showing the parts of the mold also in section; and Figure 7 is a sectional view taken on line 7-7 of Figure 6 and showing the part of the spout in its mold; Figure 8 is a fragmentary sectional view taken on line 8-8 of Figure 7; Figure 9 is a sectional view of a fully assembled pump comprising the body of a part and box of the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENT A pump dispenser or pump including a pump body and housing comprising the invention and made in accordance with the mold and process of the invention is generally designated 10 in Figures 1 and 9. The box One piece and pump body is designated 12. The box comprises (Figure 9) side walls 14, a rear wall 16 and an upper wall 18. A coaxial and unitary tubular support 20 and pump cylinder 21 (Figure 8) is attached to the upper and rear walls and intermediate and spaced apart from the side walls (Figures 4, 8). A product supply tube 22 extends forwardly from the pumping cylinder. Unitarily formed with the opposite side walls 14 are a pair of channels 24 comprising connecting walls 26 and side walls 28, the most forward of which extends inwardly from the junction wall 26 of the channel for the purpose of retaining the trigger. The channels extend vertically along the side walls 14 to the top wall 18 and end there in the slots 25 (Figure 1). Arranged at the lower end of the respective channels 24 are the trigger bolts 30 aligned opposite from the front inwards. Transverse vertical reinforcements 32 extend downwardly from the back wall 16 (Figure 9) and run between the two side walls 14. The spaced inner walls 34 run longitudinally of the box vertically and extend to the supply tube 22 to define a slot 36 of the center line. Transversal ribs 38 reinforce the inner walls 34. As shown in Fig. 9, the pump cylinder is provided with a piston 40 having an integrated inlet ball check valve 42 and a tubular rod A downwardly engaging plug with an immersion tube 46. A spring 48 inside the pumping cylinder drives the piston downwards. The lower end of the tubular support 20 engages with the retainer 50 and the retainer has a central opening that slidably receives the rod 44 of the piston. The retainer has a flange 52 on its lower end that falls into the threaded cap 54 and is adapted to be held against the termination of a container in a conventional manner (see McKinney's patent 4,161,288). The forward end of the supply tube 22 is formed with a nozzle hub or hub 60 on which the nozzle cap 62 is inserted and rotatably held in a well-known manner. An outlet check valve 64 of the type described in Smolen, Jr. patent 5,687,877 is used in the preferred embodiment. An articulated trigger 66 has side openings (not shown) that are inserted over opposite bolts 30 to rotatably mount it. The rocker 68 at the rear end of the trigger engages with the lower end of the piston 40 to raise it when the trigger is depressed. The wall 28 is superimposed on the top of the trigger to assist in assembly. Figures 5 to 8 show the body and box of the pump dispenser of the invention in the manufacturing process, that is, while it is still in its mold. The mold comprises the lower half 80 and the upper half 82. Additionally, there is a lateral central bolt 84 (figure 5) that forms the interior of the supply tube 22. The mold parts are formed to produce the unit body and box described above. The molding or sampling of the core of the upper portion of the supply tube 22 is obtained by the blade or blade 86 (FIG. 5), a lower part of the upper mold half 82. The internal walls 26 of the channels are formed by the lateral blades or blades 88 (Figure 7). The sheets 88 are also integral with the upper mold half 82. The lower portions of the side sheets 88 are formed respectively with shapes concaves 90 (FIG. 6) serving to form the upper halves of the trigger bolts. The interior of the channels as described are formed by the outer sheets 90 (FIG. 7) that extend upwards as part of the lower mold half 80 spaced respectively from the cavities 92 in the upper mold half. Inwardly of the lower ends of the outer leaves 90 the lower half 80 is formed with a concave recess 94 which forms the lower halves of the trigger bolts 30 as described. To provide a retaining wall 28 on the front wall of the channel 24 there is a cavity 96 (figure 6) in the lower mold half 80. The lower mold half 80 (figure 8) is formed with a cylindrical opening 93 to form the outer of the tubular support 20 and pump cylinder 21. It includes a neck portion 94 that separates the tubular support and pump cylinder 20, 21 of the side walls 14. It has been found that - this is necessary to ensure that there are no sinking marks on the inside of the pump cylinder that impair the capacity of the pump. A cylindrical shape 96 is formed concentrically within and spaced from the cylindrical opening 93. It forms the inner diameter of the pumping chamber / tubular support. The slots 36 and 25 (Fig. 1) left by the sheets may remain uncovered and become part of the appearance of the dispenser or, if desired or necessary, may be covered by a film or strip applied adhesively. Variations in the invention are possible. Thus, while the pump body and dispenser box, the mold and the process have been shown in only one embodiment, it is not limited in this way but is of a scope defined by the following terminology of the claims which may be extended by an extension of right to exclude others from manufacturing, using or selling the invention as appropriate under the doctrine of equivalents. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (8)

1. Claims Having described the invention as above, it is claimed as property, contained in the following claims: 1. A pump jet characterized in that it comprises a pump body molded unitary in one piece and box, the box is defined by a pair of walls spaced sides and a top wall and sloping rear wall attached to the side walls, a vertically disposed tubular support and pump cylinder spaced from the side walls and unitary with and meeting the top wall, the interior of the side walls are formed each with box-like channels extending inwardly, the channels being forward and parallel to the pump cylinder and arranged opposite each other, the channels are formed with coaxial internal trigger bolts. A pump jet according to claim 1, characterized in that it includes a supply tube that extends from an upper portion of the pump cylinder and unitary therewith, an upper portion of the supply tube is defined by the lower end from a slot in the center line extending from the upper wall of the box, the slot is defined by opposite spaced walls. 3. A pump jet according to claim 2, characterized in that a plurality of reinforcements extend between the opposite spaced walls. A pump jet according to claim 2, characterized in that the upper wall is formed with offset grooves flanking the center line slot, the offset grooves being the upper terminals of the openings in the box-like channels. 5. A pump jet according to claim 1, characterized in that the channels are formed with an internal retaining wall portion of the trigger. A pump jet according to claim 1, characterized in that a rear portion of the box below the rear wall is an upward opening. A pump jet according to claim 6, characterized in that a plurality of reinforcements extend from the rear wall to the opening upwards. 8. A method for manufacturing a one-piece trigger spray box and pump body unit, the method is characterized in that it comprises: a. provide upper and lower mold sections that have, when closed, a cavity that is of the unit shape, b. forming a tubular support and pump chamber on a vertical axis by injecting plastic between a cylindrical surface on the lower mold section and a cylindrical opening in the lower mold section surrounding the cylindrical surface, c. forming a supply tube with a horizontal axis in the front portion of the unit when injecting plastic between a retractable central bolt engaging the cylindrical outer surface and portions of the upper and lower mold sections, the upper mold section includes a center line sheet to form the upper part of the spaced supply pipe of the upper wall, d. forming upper vinapared and rear wall of the box and side walls of the box, the side walls are spaced from the tubular support and pump chamber by injecting plastic between the upper and lower mold sections, e. forming parallel, box-like, vertical, interior channels on the inside of the box that include internal trigger bolts opposite the channels when injecting plastic between the upper and lower mold sections including sheets that extend upward from the sections of lower mold and parallel spaced sheets extending from the upper mold section and f. Separate the upper and lower mold sections and the central core and remove the unit.