MXPA01009007A - High volume aerosol valve - Google Patents

Abstract

A high volume aerosol valve with an axially acting high volume valve stem having upper, intermediate and lower portions (25, 26, 27). The intermediate portion (26) has an annular gasket sealing groove with four rectangular orifices (16) having side-to-side vs. top-to-bottom dimensions in a ratio of at least approximately three to one.

Description

AEROSOL VALVE D? /O.YUMEN ELEVATED FIELD OF THE INVENTION The present invention relates to an aerosol valve for surging from a pressure vessel, and more particularly to an aerosol valve having a high volume discharge rod which acts at: a. discharge a high volume of product and allow the filling: rapid product to the container through the valve stem BACKGROUND OF THE INVENTION In a conventional manner of assembling a spray valve and an aerosol valve that acts as an immersion valve, it is opened to release product in the aerosol container by depressing a button and cap or gutter attached to the upper part of the rod. from verti to the aerosol valve When the cap or channel button is released the valve Y closes by a spring acting to reset the valve in a closed position The valve stem has an annular groove in an intermediate position, with one or relatively small holes extending through the valve stem wall at the position of the annular groove Lar An annular valve seal packing with a central opening for the valve stem is placed in the annular groove, with the holes being positioned above the bottom surface of the valve packing when the valve is in the closed position. When the valve is opened by pressing the button, etc., the valve stem moves axially downward and its one or more orifices will move to a proper position of the packing. The product in the aerosol container can then, under the influence of the impeller pass upwards through the conventional immersion tube to the valve housing that surrounds the valve stem, then through one or more orifices towards the valve stem, up through the valve stem bore , and outward through an outlet nozzle on the button, cap or gutter attached to the top of the valve stem. It is desirable in certain cases to be able to use the conventional aerosol valve described above to deliver product in large volume at high speed. , for example, product in the form of pressurized spray gas for lirnp-ar semiconductor parts, or sprays to attack nests of sighted and blowfly from a distance, etc. A limitation to date has been due to having a sufficient valve stem structure in the area of the annular groove for structural stability, with the valve stem consequently not enough total discharge area in its or .. Thus, sufficient available area inside the valve stem itself. The conventional aerosol valves described above can also be used to e-fill the product through the valve stem towards the pressure vessel for final assortment once again. Through the valve stem For the rapid filling of viscous products such as shaving gel it would also be desirable to have sufficient area inside the valve vat as well as sufficient total area in the shaft orifices to allow high speed filling. have been available until the year due to the structural reasons noted above SUMMARY OF THE INVENTION The present invention is intended to provide a high volume aerosol valve with a valve rod that acts axially having upper intermediate and lower portions. A plurality, preferably four, large rectangular holes are provided in a annular groove in the middle portion of valve stem, side to side dimensions vs. top to bottom d? the rectangular holes approaching preferably at a ratio of at least about three to one. A perforation extends from the top of the upper portion of the valve stem down through and beyond the intermediate portion of the valve stem and substantially down towards the lower portion of the rod. Narrow weft transverse members have radially outer edges integrally molded with the upper and lower portions of the rod and occupy the rod bore from a • Position substantially upward toward the upper portion of the stem extending downwardly through the intermediate stem portion and substantially downward toward the lower stem portion at the perforation end. The edges radially. external 2nd narrow weft members, in the intermediate portion of the rod, of Einen the plurality of large rectangular holes in the intermediate portion of the rod, The plurality of orifices, which is along the circumference of a circle perpendicular to the axis of the rod.

The rod and which passes through the radially outer edges of the narrow transverse weft members occupy at least seventy, and preferably at least seventy-five percent of the circumference of the circle. It should therefore be understood that the rectangular holes in the annular groove largely take up the circumference of the groove, so as to provide a very large total discharge (or filling) area. Even with the very large rectangular holes, the narrow weft transverse members, the end edges of which define the large rectangular holes, provide sufficient structure and prevent stem breakage. This is because the narrow weft transverse members extend substantially upward toward the upper portion of the rod as a substance downward toward the lower portion of the rod. However, the narrow weft transverse members leave sufficient internal area in the valve stem to permit high volume discharge and the desired rapid filling. The flow of product during discharge, or filling through the rod, consequently, is maximized by the present invention. The high volume valve stem of the present invention is also simple in structure and is easily molded in one piece. of plastic, for example nylon, Other features and advantages of the present invention will become apparent from the following description, drawings and claims.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. J. is a cross-sectional axial cross-sectional drawing showing the high-volume aerosol valve of the present invention in the closed position. Fig. 2 is a cross-sectional axial cross-sectional drawing showing the high volume aerosol valve of the present invention in the open position. Figure 3 is a side elevation of the high volume valve stem of the present invention, in partial cross section: Figure 4 is a partial axial cross sectional view of the valve stem, taken along lines 4-4. of the Figure? Figure 5 is a top plan view of the raised valve stem of the present invention, Figure 6 is a horizontal cross-sectional view of the valve stem, taken along lines 6-6 of FIG. Figure 3 and Figure 7 ee a partial side elevation view of the valve stem, taken in the direction of arrow 7 in Figure 6.

Detailed Description of the Modality Referring to Figures 1-2, an aerosol valve assembly, generally designated 10, is fitted and stamped towards a pedestal portion 11 of a mounting cup closure 12 for a pressure vessel (FIG. not shown) The pressure vessel retains a propellant and a product to be dispensed, or in some cases relevant to the present invention, only a propellant to be used, for example, as a spray gas. The valve LO assembly generally includes a valve housing 13, a valve closing helical spring 14, and valve stem 15 The valve stem 15 contains lateral holes 16 that enter from the exterior of the rod towards the inner bore of the rod 15 The protrusion 17 extends downwardly from the rod L of the valve. valve and holds and centers the upper part of the helical spring 14 The elastic annular packing 18 surrounds the valve stem 15 and seals the rod holes 16 when the aerosol valve is closed (Figure 1). The annular gasket is clamped between the lower side of the pedestal portion 11 of the mounting cup 12 and an annular flange 19 facing upward in the lower portion of the valve stem 15. The mounting cup is stamped at 20 to retain the aerosol valve assembly. Attached to the upper part of the valve stem 15 by an annular channel is a conventional actuating channel 21 which has an internal product passage 22 in fluid contact with the hollow valve rod 15 and having an outlet nozzle 23 for ejection When the actuating member 21 is depressed downwardly against the force of the spring 14, the stem valves 16 pass under the annular gasket 18 (see Figure 2) and the product within the aerosol container can Now pass towards the valve housing L3 upwards around the lower portion of the valve rod 15, through the rod holes 16 towards the valve rod 15, upwards through the hollow rod towards the actuating member 21, and outwardly through the nozzle 23. When the actuating member 21 is released, the spring 14 pushes the valve rod 15 upwards to the position of Figure 1. where the valve holes L6 are again blocked by the packing 18 The valve is now closed and the product flow is blocked from entering the valve stem The previous discussion of Figures 1 and 2, in general, also it is applied to conventional aerosol valves with an axially acting valve rod. Turning now to the features of the present invention, FIG. 3-7 illustrate the axially acting high volume discharge rod 15, having the upper portion 25, portion The intermediate portion 26 and the lower portion 27 The intermediate portion 26 is effectively an annular rod groove defined by the truncated cone surface 28 extending inwardly and downwardly from the upper rod portion 25 and the annular rim at the upper portion of the upper portion. the lower stem portion 27 The intermediate portion 26 co -its large rectangular holes 16 as discussed in more detail further ahead As noted above, the annular packing 18 (see Figure 1) is received within the annular rod groove of the intermediate portion 26 of the rod. Extending from the upper portion of the upper portion 25 of the rod is the piercing 2? of shank extending downwardly through and beyond the intermediate portion 26 of the shank and substratum to the lower portion 27 of the shank at the bottom 30 of the perforation. The vertical ribs 31 against the shank. They are shown positioned in the upper stem portion 25. The cup-shaped opening 32 extends well upwards toward the lower stem portion 2 7 to reduce material and also provides more rapid cooling of the valve stem after its molding. recesses 33 in the lower rod portion X 'allow the product from the container to flow between the valve housing 13 and the lower stem portion 27. The narrow vertical weft cross members 35 are molded. within the rod bore 29 and occupy the bore 29 of a rod from a substantial position upward toward the upper portion 25 of the rod extending down through the intermediate portion 26 of the rod and substantially downward towards the lower portion 27 of the rod. The narrow raster members 35 terminate at a point Z l within the portion 2 l- >; top of stem and bottom 20 of the bore within the portion 27 of the rod Loe edges 36 radially? The outer members of the weft members 35 are integrally molded with the stem portion 27 and the upper portion 25 of the rod. In the intermediate rod portion 26, the radially outer edges 38 of the weft member 4 extend radially. farther out than the edges 36 up and down The radially outer edges 38 define therebetween the plurality (preferably four and at least three) of large rectangular holes 16 in the middle portion 26 of the rod. It will be noted that the larger rectangular holes they have a side-by-side dimension that is substantially greater than the top to bottom diameter. In a sample mode, each large rectangular hole is 2 03 millimeters (0 33 inches) by 0 69 millimeters (0 027 inches) two approximately three to one in relation In a normal drawn circle the stem axis, which passes through the large rectangular holes L6 and passing through of the radially outer edges 38 of the four frame members 35 the large rectangular holes 16 must occupy at least seventy and preferably at least seventy-five times the circumference of the circle. In the sample mode the circle has a diameter of 3 56 millimeters fO 0140 inches) each edge 38 radially outward has a dimension along the circumference of the circle of 0.64 millimeters (0.025 inches), and in this way large rectangular orifices 16. occupy more than seventy five percent of the circumference of the circle, the frame members 35, in view of extending well up and down the intermediate shank portion 26, provide a strong internal shank support structure in the intermediate portion 26 to insure against breakage of the shank. rod, despite the fact that the large rectangular holes 16 take a large part of the circumference of the portion 26 inte rmedia The portion of the perforation extending down to the lower portion of the rod 27 also provides a deposit for grime or product that could otherwise act to accumulate at or above the orifices 16. The frame members 36 of the present invention , in view of the fact that they are very narrow, they do not turn excess of internal area to the perforation 29 of the rod. In the sample embodiment, the weft members 35 in horizontal cross section directly above the intermediate shank portion 26, take less than fifty percent of the available cross sectional area internal to the shank. Referring to Figure 5, the four internal areas in the sample mode between the frame members 35 are each 0.01 square centimeters (0.0016 square inches) with the perforation of the rod being 2.79 millimeters (0.110 inches) in diameter . For the sample embodiment of the present invention the next nominal dimension of high volume rod arrow Ai, in addition to the dimensions previously provided above, provide a high and rapid velocity discharge, at the rod's underside, filling part Dimension. upper to lower of the frame members 35 - 4 83 millimeters (0.190 inches) Width of each frame member 35 - 0.64 millimeters (0.025 inches) Side-to-side dimension between external radial edges 22 of the frame members 35 - 3 56 millimeters (0 140 inches). Dimension from side to side between diametrically opposed radial external edges 36 of the frame members 35 - 2 79 millimeters (0 1] 0 inches). Outer diameter of upper portion 25 of stem - 4 01 millimeters (0 158 inches) It will be observed by persons skilled in the art that variations and / or modifications to the present invention can be made without departing from the spirit and scope of the invention. it should be understood that terms such as "upper A" lower1, "intermediate" "internal" "external" "horizontal", "vertical", "upper", "lower", "up" "down" and corresponding sinilar positional terms as used in the specification are used and intended in relation to 3 positions shown in the drawings and are not otherwise intended be restrictive

Claims (1)

1. - A high-volume aerosol valve, comprising in combination a mounting cup; an aerosol valve housing retained within the mounting cup; an axially acting valve rod mounted within the housing, the valve rod having an upper portion extending up and out of the mounting cup, an intermediate portion having a plurality of large rectangular holes. and a lower portion; the intermediate rod portion having an annular groove therein; an annular gasket that surrounds and seals the intermediate portion of the valve stem including the plurality of large rectangular holes when the valve rod is not axially depressed, the valve rod having a bore extending from the top of the upper portion of the valve. rod down through and beyond the intermediate portion of the rod and substantially downward toward the lower portion of the rod; narrow weft members having radially external edges integrally molded with the upper and lower portions of the rod and occupying the rod perforation from a substantially upward toward the upper portion L6 of the rod extending downwardly through the intermediate portion of the rod and substantially downward toward the lower portion of the rod at the bottom of the bore, the radially outer edges of the narrow web members, in the intermediate portion of the rod, defining between the same the plurality of large rectangular holes in the intermediate portion of the rod, the large rectangular holes having a side dimension to Jado substantially greater than the dimension from top to bottom, the plurality of large rectangular holes, remaining along a circle which passes through the radially outer edges of the narrow weft members, occupying at least seventy percent of the circumference of the circle 2 - The invention according to claim 1 wherein four large rectangular holes are located occupying at least seventy and five percent of the circumference of the circle Item 3 - The invention according to claim 1, wherein the rectangular ori- gins have a side-by-side aspect ratio vs. top-to-bottom dimension "of when appropriate. ? r. adament e three to one 4 - The invention according to claim 1 wherein the narrow weft members in cross section hopzontally directly above the intermediate portion of the stem take less than fifty percent of the cross sectional area available to the rod. 5 - The invention according to claim 1 wherein the radial dimension of the narrow weft members in the upper and lower portions of the rod is smaller than the radial dimension of the narrow weft members in the intermediate portion of the rod 6 - invention according to claim 1 wherein the narrow weft members form a cross in horizontal cross section