KR810000859Y1 - Hand-operated liquid sprayer - Google Patents

Abstract

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Description

Manual Liquid Liquid Spray Gun

1 is a cross-sectional view of a preferred embodiment of the present invention showing a triggered pump device in a stationary or non-positive state.

2 is a cross-sectional view similar to FIG. 1 showing another embodiment of the present invention.

The present invention relates to a manual nebulizer having an automatic container vent.

A common problem with manual nebulizers is the need to eliminate the vacuum pressure generated in the nebulizer and the closed vessel when the liquid is pumped. The generated vacuum is removed by entering the atmosphere into the vessel to face the ejected liquid. A number of devices have been proposed for this purpose, but generally have separate or discontinuous valve arrangements with or without aeration, which are often difficult to assemble, expensive and inconvenient to use and operate.

It is very important that no leaks occur when the trigger or operator is stationary and when the container and sprayer are lying on its side or when it is upside down or when the container is full.

A number of patents have been published relating to a manual atomizer of the trigger piston type for ejecting liquid from a container. For example, Tracy Bee as of October 30, 1962. In US Pat. No. 3,061,202 to Tyler, a basic triggered sprayer is introduced that is vented by a separate valve that is deflected in the open state. Another patent introducing a similar atomizer using a discontinuous valve for aeration was provided by Carl E. Lee on March 13, 1972. United States Patent No. 3,650,473 to Malone, Vance R., dated August 22, 1972. US Patent No. 3,685,739 to Veneer and Richard, 25 December 1973. tea. United States Patent No. 3,780,951 to Powerers. The first Marlon patent mentioned was similar to Tyler's device, but the Powders patent applied a collar that was attached to the vessel and spirally screwed downward by the operator to seal the annular slot, thereby preventing the leak from the veneer vessel. The air vents through the body of the sprayer are shown. The second-mentioned Vanier's patent uses a vent that introduces air into the vessel through an elastic cone valve and through the lower body of the sprayer.

Jay on October 3, 1974. F. In U. S. Patent No. 3,840, 157 to Helen Camp, the above-mentioned sprayer and other trigger actuation of the above-mentioned patent, which is installed so that the plunger or piston shaft is arranged vertically and is movable from the seal collar to permit the aeration of the vessel. July 31, 1973, the sprayer introduces a deformable diaphragm pump device in which the vent surface is not allowed to apply atmospheric pressure to the interior of the vessel. a. It is shown as one embodiment of a lever or trigger actuated ventilator, such as US Pat. No. 3,749,290 to Mickle. Besides T. U.S. Patent No. 3,701,478, issued October 31, 1972, United States Patent No. 3,762,647, issued October 2, 1973, and United States Patent No. 3,770,206, issued November 6, 1973. Five. J. Patent No. 3,768,734, issued to Anderson Jr., issued October 30, 1974. F. United States Patent No. 3,820,721, issued to Helen Calf, published June 28, 1974, also illustrates another patented device with a venting device.

The present invention provides a simple, efficient, inexpensive and easy venting device and has an automatic drainage feature in a clear structure that operates without the use of additional parts or component devices during pumping and spraying operations.

It is therefore an object of the present invention to provide an aeration device for a manual trigger sprayer that is simple in structure, efficient in operation, easy to manufacture and economical.

Yet another object of the present invention is to provide a manual trigger sprayer that does not use separate devices or other parts that vent the container or additional elements that work together.

Another object of the present invention is to provide a manual trigger sprayer of the above type in which liquid leaked by the vent element portion is drained into the container rather than leaking from the sprayer.

Other objects and advantages of the present invention will become apparent from the following drawings and detailed description.

In FIG. 1, the triggered manual sprayer 10 has a housing or element support body having an empty pump pail or hole 11 of which a cylinder is connected to its side wall by an outlet or outlet passage 12 connected to a cylinder 13 in a nozzle 14 and whose upper end is closed. Has 10-a. The nozzle 14 has a discharge orifice or “spray” nozzle hole 15. Inlet passage 16 connects between the pump vessel or hole 11 and the inlet valve passage 17 of the suction body 17-a. The keg 17 has a ball check 18 of the inlet passage 20 which is sealed on the valve seat 19. The liquid ejection or dip tube 21 is hermetically fixed and extends downward from the body 17-a to the vessel 23 and ends at the bottom (not shown) of the vessel. The container lid 22 is attached to the body 10-a above the body 17-a and is suitable for being screwed down or screwed down into the spiral neck of the container 23 without leaking the liquid. A ring or lip seal 24 is formed on the bottom surface of the body 17-a and engages with the top surface of the container 23.

A plunger assembly 25 consisting of a hollow piston 25-a and a carrier or support 25-b is slidably positioned to reciprocate in the keg or hole 11. Support 25-b has a groove 25-c at its lower end that engages extension 27-a of trigger 27 installed on body 10-a by pivot or pin connector 29. The piston 25-a is engaged in the second recess of the support 25-b at the opposite end of the support and in the illustrated embodiment has seals 30 and 31 extending in a pair of distant annular circumferences, the seal 30 being It is a lip seal which is hermetically contacted with the wall of the hole 11 and is inclined to extend rearward, while the seal 31 has a round circle which is hermetically contacted with the wall of the hole 11. The compression spring 26 is installed in the hole 11 located between the hollow interior of the piston 25-a and its closed end axially deflecting the plunger assembly 25 in the outward or distant direction of the lifejacket 11, as shown in the figure. The spring 26 is installed with some compression in its standstill.

Obviously in FIG. 1, when trigger 27 operates and pivots around pin 29, plunger assembly 25 and piston 25-a reciprocate in hole 11 to compress spring 26 to start and maintain pumping of sprayer 10.

As mentioned above, in a preferred embodiment the piston 25-a is provided with a spaced apart cylindrical seal 30 and an annular circular seal 31 which sealably engages the inner wall of the hole 11. In the stationary or non-acquisition position as shown in FIG. Spans 33-a. Aeration 33 extends from space or groove 32 into one or more vertical passages 34 (only one shown in the drawing) formed in body 17-a and from container 23 to space or groove 32 to permit aeration of the container 23. Provide fluid connection.

Referring back to FIG. 1, it will be apparent that the present invention is easily operated with one seal on the piston 25-a, ie, the front lip seal 300,000. In this case, in the stationary state shown in FIG. 1 (and FIG. 2), the piston 25 is located in the keg 11 such that the seal 30 is placed side by side with 33 holes or 33-a in the aeration. When 2 degrees and 125) are at rest, it means that the seal 30 is usually located close to the inlet 33-a above or on either side of the inlet 33-a. Of course, it is desirable that one seal device, seal 30 (or second degree 130), is placed side by side with the inlet 33-a on the trigger 27 to maintain the aforementioned "leakage" effect. In operation, however, the aeration purpose is obtained as one seal 30 (or 130) even if the seal is arranged side by side on the opposite side of the hole 33-a or on top of the hole in the rest position.

However, in such an apparatus, some leakage is expected in some cases, such as when the nebulizer 10 and the vessel 23 are turned upside down or laterally laid down. It is of course also possible to modify the nebulizer 10 by some known method (not shown) to avoid the accidental case. For example, the leakage caused by the formation of a 33 in a fine diameter capillary is not important, but the aeration is activated. Another method of preventing or mitigating such leaks is to use 33 as aeration through materials known in the art that allow gas or air to flow and liquid to flow. Finally, a mechanical device, such as a check valve (not shown), may be used at vent 33 or 34 to prevent leakage and allow air to flow in the opposite direction to evacuate vessel 23.

In operation of the preferred embodiment of the present invention of FIG. 1, the vessel 23 is filled with liquid and the sprayer 10 is attached by screwing or screwing the lid 22 downward onto the neck of the vessel 23 and the dip plate 21 extends below the liquid surface. . A liquid-tight seal is obtained by the sealing 24 on the upper surface of the container 23 when the lid 22 is screwed or tightened downwards to the container neck. The nebulizer 10 is prepared to spray the liquid by holding the container 23, i.e., the trigger gripping with the finger. Trigger 27 is squeezed to push plunger assembly 25 and piston 25-a into hole 11 to pressurize air in the hole and ball 18 to close seat 19. The air in the barrel or hole 11 flows into the outlet or outlet passage 12 and the cylinder 13 of the nozzle 14 to move the slide valve member 35 to the left. Fluid flows around the valve part 35 through a radial passage formed between the vertical wall 35-a and the ridge 35-b at the end of the member 35 and is sprayed out through the orifice 15 of the nozzle 14. When trigger 27 is released, piston 25-a and plunger 25 move in opposition to the force of compression spring 26, and trigger 27 returns to the stop position. This actuation causes expansion or increase in the volume of the canister 11 and a slight vacuum causes the ball check 18 to open and the valve member 35 in the nozzle 14 to close the sheet 36 in the canister 13. At the same time, the liquid is sucked through the pipe 29, the tub 17 and the inlet passage 16 into the hole 11. The seal 30 on the piston 25-a prevents liquid leakage from the pail or hole 11 but when the leak occurs the liquid is drained into the vessel 23 through passages 33 and 34 from the annular space 30 and sprayed by the seal 31. 10 can not flow outside. Continuously gripping and releasing trigger 27 repeats the cycle except for the fact that the current liquid is pumped and sprayed from the vessel 23.

However, it is required for the atmosphere to enter the vessel 23 to replenish the volume of liquid withdrawn from the vessel and to equalize the pressure in the vessel. If no aeration is made, a vacuum is generated in the vessel 23 to stop liquid spraying or to deform or distort the vessel 23. The vents 33 and 34, which are connected to the wall of the barrel or hole 11 and the body 17-a, allow for a vent connection between the interior of the vessel 23 and the atmosphere, respectively. If annular spaced seals 30 and 31 are used on piston 25-a and span inlet 33-a to aeration 33 and trigger 27 is gripped and piston 25-a moves in barrel 11, seal 31 is either a bore or Pass inlet 33-a through aeration 33 and vessel 23 is vented to atmosphere. Thus, the location of inlet 33-a for aeration 33 between seals 30 and 31 in annular space 32 and very close to seal 31 permits the aeration of vessel 23 during pumping or spraying stroke, but in a non-positive or stopping position. Good closure to 23 is provided at the same time.

With reference to FIG. 2, an additional embodiment is shown in which a single piston and plunger 125 is shown. The piston or plunger 125 is a single molded part with seals or seal surfaces 130 and 131 extending in a spaced apart annular circumference and is in a stationary position, as shown in FIG. Seals 130 and 131 are separated by circumferential or annular recesses 132 and span 33 holes or inlets 33-a in the aeration as in the embodiment of FIG. In all other respects of construction and operation, the embodiment of FIG. 2 is the same as that of FIG. Furthermore, although not shown here, the seal 130 can be shaped like a lip seal in a molding or similar manner and provides a quick return to the stop position of the pump and trigger by the compressed spring 26 due to the low friction between the seal and the wall. It is obvious that it can be provided.

It can be seen that one sealing device similar to that described above is usable in this embodiment and that this is fully considered. In addition, the piston or plunger 125 may be molded with a suitable annular groove (not shown) which is installed to provide better results instead of the seal elements 130 and 131 shown, such as a zero ring seal. It may also be located in the hole 11 where the seal element associated with the piston is held fixed relative to the piston 25 as the piston reciprocates. Briefly, various methods can be used to provide the necessary sealing between the piston and the bore in the keg 11 and can be accomplished by one skilled in the art. Similarly, leaks can also be treated in accordance with known methods.

The above-described design can be made of thermoplastic materials by known methods, such as blow molding, injection molding, casting, etc., depending on the materials used and the required spraying performance. Useful and suitable examples for carrying out the present invention are polystyrene, polyvinylchloride, polyurethane, polyolefins, polyamides, polyacetates, polycarbonates, polyesters and mixtures thereof. More preferred materials are polyolefins and polypropylenes, which have various desirable properties such as elasticity and are therefore particularly used for seal elements or pistons 25-a and 125. Other suitable materials are natural rubber, synthetic rubber, acrylonitrile butadiene styrene (ABS) and mixtures thereof. Each material will be chosen to be manufactured with the best performance and the lowest cost.

Claims (1)

Pistons movable in the openings 11 defined in the interior of the element support body 10-a and connected to the surrounding air and the holes defining the variable volume, and the element carrying body for transporting liquid in and out of the variable volume. Actuator (33, 34) extending through body and hole (33-a) and actuator with inlet and outlet located therein and trigger (27) for reciprocating the piston in the hole between the non-positive and pumping positions And manual liquid atomizer consisting of a seal device which prevents the connection between the vent and the ambient air at the non-pumped position and allows a free connection between the vent and the ambient air at the pumped position.