US3450171A - Dispensing valve suitable for filling a container under low pressure - Google Patents

Description

June 7, 1969 RYUTARO TAKIGUCHI 3,45 ,17

UISPENSlNG VALVE SUITABLE FOR FILLING A CONTAINER UNDER LOW PRESSURE Filed Jan. 23, 1967 RYUTARO mKIeucHI INVENT OR BY WW WM ATTORNEY) United States Patent US. Cl. 141-40 1 Claim ABSTRACT OF THE DISCLOSURE A dispensing valve suitable for filling a container under low pressure. A hollow valve body has a stem extending into it which is movable to flex a packing. The stem has a passage along the outside surface thereof, said passage descending through a packing in the top of the valve body during filling to exhaust gas past said top packing. The flexible packing is held in the valve body to obturate a passage from a dip tube through the interior of the stem. When filling or replenishment is effected, the actuator normally present on the stem is removed and the container is inverted and the injection port of a bomb or the like is placed over the end of the stern and the stem is depressed, thereby to effect filling or replenishment; and the air in the container which is displaced flows out through said passage on the outside of said stem past said top packing.

This invention relates to the improvements in a dispensing valve which is also suitable for filling a container such as an aerosol type container with material to be dispensed under low pressure, whereby filling or replenishment of a material to be dispensed into a container is effected by inverting the container and keeping on exhausting gas in the container through a bomb or other means during replenishment.

The conventional valves of this kind involve many parts and moreover demand high precision for assemblage thereof, resulting in a complicated structure and a high price of the resulting valves. The present invention seeks to eliminate such defects and to provide a valve which is extremely simple in structure, easy to handle and low in price.

This invention will now be described with reference to the accompanying drawings which show by way of example an embodiment of said invention.

In the drawings:

FIGURE 1 is a longitudinal section of the valve according to the present invention, showing the condition in which said valve is in a closed state;

FIGURE 2 is a longitudinal section of the same, showing the condition in which injection is being effected; and

FIGURE 3 is a longitudinal section of the same, showing the condition in which filling is being elfected.

The gist of the invention, as illustrated with reference to the accompanying drawings embodying the invention, will be described as follows.

Namely, the present invention concerns a dispensing valve which can also be used for filling a container under low pressure, which valve has a valve body 1 having an inlet port 2 at the bottom thereof opening into the container (not shown). A packing 6 is placed in a recess of a stem 4 pressed by a spring 3 mounted in said valve body 1. A packing 9 closes an upper opening of said valve body 1 to ensure air-tightness. A passage 8 is formed in said stem 4, said passage being in communication with a small hole 7 opening out of stem 4 above the upper part of said packing 6 when the valve is closed. A

3,450,171 Patented June 17, 1969 passage 13 is formed along the side of said stem 4, said passage descending, during filling, to exhaust gas in the container. An insert 10 is inserted in the upper end of said stem 4, said insert having at its upper end a connecting port 12 to be placed on the injection stem 11 of a bomb or the like and being so arranged that the hollow center 14 thereof is in communication with said passage 8. An inner body 15 is mounted between said packings 6 and 9, said inner body 15 having an expansion space 16 and defining a space around the periphery of said stem 4. A passage 18 is formed in the periphery of the valve body 1, said passage being in communication with a dip tube 17 through which the material to be dispensed is supplied to the expansion space 16, with the upper end of said passage 18 being in communication with a recess 19.formed around a part of the inner body 15 where the packing 6 contacts it and also to a passage 20 formed in the lower side of said body 15. An actuator 21 is mounted on the upper end of said insert 10, said actuator having a nozzle 22 through which the injection material is jetted during dispensing.

When filling or replenishment is effected, said actuator 21 is removed and the container is inverted and the injection port 11 of a bomb, etc., is placed against the connecting port 12 of the insert 10, thereby to eflfect filling or replenishment.

For carrying out dispensing with the valve according to the present invention, the actuator 21 is put on the insert 10 and then depressed. Then the center of the packing 6 is inclined as shown in FIG. 2, whereby said packing 6 is slightly separated from the inside of the bottom face of the inner body 15, thus permitting inter-communication between the recess 19 and the small hole 7, so that the injection material is guided through the dip tube 17, passages 18 and 20 recess 19, small hole 7 and passages 8 and 14 to be finally jetted outside through nozzle 22. When the depression force against the actuator 21 is released, the stem 4 is pushed up by elastic force of the spring 3 and is closed as shown in FIG. 1, thus stopping the dispensing. When it is desired to carry out filling or replenishment, the actuator 21 is removed from the insert 10, then the container is inverted, placing the end of the injection port 11 of a supply bomb over the connecting port 12, and then the stem 4 is depressed. Consequently, the container is in an inverted condition as shown in FIG. 3-, and the injection material is replenished by introducing it through the passages 14, 8, hole 7 and injection port 2, while the air and other gaseous substances are released outside of the container through the dip tube 17, passages 18, 20, recess 19, expansion space 16 and passage 13, thus permitting easy replenishment under low pressure.

The present invention being composed as described above, it is possible to dispense any desired amount of material by adjusting the depressing time of the actuator. Thus, when the actuator is removed and then the container is inverted while placing the injection port of the supply bomb over the connecting port, followed by depressing of the stem, the container is in an inverted condition as shown in FIG. 3, and particularly in case of filling, the passage provided along the outside of the stern acts to guide the gaseous substances, such as air, out of the container. Also, since the inside of the container is opened to the external atmosphere, exhaustion of the air is effected under atmospheric pressure, thus permitting, as a consequence, filling under the same low pressure as the internal pressure of the supply bomb, thereby eliminating any necessity of cold filling or pressure filling such as is conventionally practiced, so that it is possible with the present invention to easily replenish the container from a supply bomb even at home.

What is claimed is:

1. A dispensing valve suitable for filling a container under low pressure, which comprises: a valve body having a hollow interior with an opening at the top and an inlet port at the bottom thereof; a stern extending into said body and having a recess therein; a packing in the recess of a stem; a spring mounted in said valve body and bearing against said stern and urging it out of said body; a further packing closing the top opening of said valve body and engaged around said stem in airtight slidable engagement, said stem having a hollow interior and a small hole opening through said stem from said hollow interior at a point above said packing when the valve is closed; said stem further having a passage along the outside surface thereof, said passage descending through said further packing during filling to exhaust gas past said further packing; an insert inserted in the upper end of said stem, said insert having at its upper end a connecting port adapted to be placed on the injection port of a bomb or the like and having a center passage extending from said connecting port to the hollow interior of said stem; an inner body mounted between said packings in the interior of said valve body, said inner body having an expansion space therein and defining a space around the periphery of said stern; said valve body having a passage formed in the periphery thereof; a dip tube extending from said valve body and communicating with said passage in the periphery of said valve body and through which the material to be dispensed is supplied into the expansion space, said inner body having a recess formed around the part thereof contacting the first-mentioned packing and into which the upper end of said passage in the valve body periphery opens; and an actuator removably mounted on the upper end of said insert, said actuator having a nozzle through which the material to be dispensed is jetted, whereby when filling or replenishment is effected, said actuator is removed and the container is inverted and the injection port of a bomb or the like is placed over the connecting port of the insert and the stem is depressed, thereby to eifect filling or replenishment; and the air in the container which is displaced flows out through said passage on the outside of said stem past said first-mentioned packing.

References Cited UNITED STATES PATENTS 3,180,374 4/1965 Muller l4l--2O HOUSTON S. BELL, 111., Primary Examiner.

U.S. Cl. X.R.

l4ll13, 302; 222-402.l6

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