Funnel to counter out-splashing of a fluid being poured through it
A conventional funnel that has a rimmed open bowl atop a spout, to guide a fluid flow poured in from a fluid-contributing source or container into a fluid-receiving container, is improved by the provision of a curved-in lip around the bowl rim. The curved-in lip intercepts any fluid seeking to splash out of the funnel for a variety of reasons, and redirects it back into the bowl to counter undesirable splash-out. The curved-in rim, even when of very small span, is effective in countering splash-out of true liquids, mixtures of non-sticking solid particulates in a liquid, dry flowing particulates and even small sized objects like peanuts. The provision of a perforated collar at the junction of the bowl and the spout, a flexible portion provided to the spout adjacent the same junction, and a plurality of outwardly extending vanes provided outside the spout, and flutes formed in the bowl to promote Coriolis-acceleration-influenced flow, added individually or in selected combinations, variously improve the funnel further by making it more securely locatable with respect to the receiving container, facilitating venting of displaced air therefrom, and promoting fluid throughflow via the funnel.
This invention relates to improvements to a conventional funnel, of the kind commonly used to help guide a fluid flow from a fluid-contributing container into a fluid-receiving container, to counter out-splashing from the funnel as the fluid is being poured through it. More particularly, it relates to simple structural improvements to a conventional funnel that significantly reduce the natural tendency of a fluid being poured through it to splash away from the intended transfer flow and out of the funnel due to factors such as: (a) the funnel not being held upright during the pour; (b) unevenly oriented or pulsating flow out of the contributing container, (c) inertial forces that tend to bounce back fast-pouring fluid from the inner surface of the funnel and over the funnel rim, (d) upward blowback of air and/or vapor from the receiving container, or (e) inadvertently caused instability of the funnel body during the pouring operation.
BACKGROUND OF THE RELATED ARTThe term “fluid” in the present context means essentially incompressible fluids, and comprises substances that are liquids at the temperatures at which they are being poured, e.g., water, gasoline, diesel fuel, hot wax, molten metals, liquefied gases, etc. The term “fluid” here also includes slurries, namely free-flowing mixtures of true liquids and fine particulates, e.g., blood, milk, paints, emulsions, muddy water, etc., at their normal processing temperatures. Based on experimental data, for all practical purposes “fluid” here can even include flowing particulates, e.g., grain, sand, beads, seeds, etc., that can be poured in a streaming fashion through an appropriately sized funnel. All such “fluids” are known to suffer “splash-out” during their flow through conventional funnels.
The “funnels” in the present context range in physical size to ensure flow-through capacities ranging from a few fluid ounces per minute to many gallons or cubic feet per minute when made large enough. Selection of funnel shape, size and material for a given application involves many factors, including: sound judgment, engineering and safety standards, past experience, available design choices, properties of the fluid of interest, and cost.
The funnels may be made of a very wide range of “materials” as most appropriate for particular applications. An inexpensive, portable, disposable funnel, e.g., to facilitate transfer of water or milk, preferably may be made of inexpensive, thin-walled, more or less transparent plastics material of the kind used currently to make throwaway soft-drink or purified water bottles. For disposable funnels to transfer gasoline, diesel fuel, paint thinners, paint removers, and the like, a corresponding safety-approved plastics material should be used. For transfer of more sensitive or dangerous fluids, e.g., acids, liquefied gases or molten metals, safe alloys, glass, ceramics, or refractory materials should be used as appropriate. Such funnels, because of their relatively high cost, must be made strong and highly durable to ensure a long service life.
All flows of interest through the funnel itself are gravity-dependent. A fluid may arrive at the funnel via a pressurized lumen with a forwardly-directed average flow velocity as it leaves the contributing element or container; but it is not thereafter forced through the funnel under any externally applied pressure. Instead, the free-flowing fluid has to be guided by the inside surface of the funnel to move downward, through a diminishing cross-sectional area, solely under the influence of the Earth's gravity.
This is where the initial problem is encountered: some of the arriving flow will often tend to continue going forward and right over the top of rim directly in front of it. If the input flow is reduced enough to control this natural tendency, it may reduce “splash-out” from the conventional funnel. However, the requisite slowdown may not be possible or practical; and the problem is best addressed by improvements to the funnel structure.
Conventional funnels often have an open, wide-mouthed, conical portion (the bowl) at the top for receiving a fluid flow from a contributing source, e.g., a faucet, a nozzle, or a portable container. Contiguous with, and below it, there is typically an elongate, often mildly conical, much narrower tubular delivery portion (the spout) sized to be loosely (or at least partly) inserted during use into the mouth or throat of a fluid-receiving container.
For many applications, the mouth of the receiving container is stationary and the funnel spout is fully inserted into it so that a lower part of the conical bowl rests on it—with the central axis of the funnel held practically vertical. The user may be able to hold the funnel steady with one hand, while holding the contributing container with his or her other hand and pouring the fluid from it into the bowl of the funnel. In the alternative, someone else may have to hold the funnel steady and upright.
Circumstances sometimes make it difficult to dispose and maintain a conventional funnel upright during use. For example, in an emergency one might have to pour gasoline or diesel fuel, from a spare fuel can that lacks its own nozzle, into an automobile fuel tank through an intake that does not have a horizontal opening and so will not allow the conventional funnel to be used upright. This can easily lead to some fuel splashing out over the lower edge of the bowl of the necessarily tipped funnel; especially when a person is operating alone and perhaps under awkward circumstances, e.g., in a poorly lit area or in inclement weather. One solution is to make the funnel spout long and flexible; and such known funnels are sometimes used to add fuel or transmission fluid, or to collect used motor oil from auto engines into oil recycling receptacles. However, because of their relatively long bodies, they are not convenient for use outside garages or auto repair shops where the funnels can be set aside between uses so that residual fluid that drips from them can be routinely collected after each use.
As gravity evacuates fluid from the typical contributing container of defined volume, a commensurate volume of air is concurrently sucked into it to replace the evacuated fluid. These oppositely directed flows can cause incoming air bubbles to interrupt fluid outflow and make it irregular and pulsatile in nature, especially if the contributing container has thin flexible walls. Such a fluid flow typically is gurgling, uneven, and at times randomly directed out of the contributing container. Sometimes this arbitrarily oriented fluid flow travels rapidly forward, and splashes right over the top edge and out of the conical funnel bowl at its front.
If the outflow of fluid from the contributing container is substantial, e.g., with a low viscosity liquid like gasoline delivered through a pump delivery hose/nozzle, and the flow velocity therefore relatively high, the flow stream might bounce right back off the inclined inner surface of even a steady and upright conical funnel. Such an impact-induced flow reversal, and its inertial effects, can cause some of the bounced fluid to splash upward over the funnel rim and right out of the funnel. One known solution to deal with such problems is to add a contiguous cylindrical upper section to raise the rim above the conical portion of the bowl, but this may make the funnel too large for it to be portable for most users.
As fluid fills the interior of the receiving container it must displace a corresponding volume of air from it. Sometimes, as in canning jellies, the fluid flow may be hot, and it may heat the air being displaced out of the receiving container. If the funnel spout is sized to closely fit into the mouth of that container, air cannot easily escape out of the receiving container as it fills up with fluid, and so there might be temporary and abrupt increases of air back-pressure acting upward on the fluid flowing down through the spout. These air pressure changes can cause unsteady blowback of air into the funnel, often as powerful bubble-bursts in the fluid still in the funnel bowl; and such flow disruption also could cause fluid to splash out of the funnel.
The person pouring fluid into the funnel might get momentarily distracted or feel weak or tired, and might then unintentionally bump the funnel with the fluid-contributing container or nozzle. This could cause an otherwise steady and upright funnel to rock to and fro or incline rapidly (or in the worst case scenario entirely tip over and out of the mouth of the receiving container), and this might cause the pouring fluid to splash out of the funnel bowl.
Unintentional splash-out of the fluid being funneled might be merely embarrassing, if the fluid is not potentially harmful. However, serious harm could result if the splashed fluid comprises a strong acid or alkali, or is hot, poisonous, biohazardous, corrosive, flammable, penetrating, adhesive, a liquefied gas, or a slick substance likely to cause slip-and-fall accidents in a high-traffic area. The related embarrassment and/or physical dangers are better avoided than later paid for by insurance and/or lawsuits.
A need clearly exists for inexpensive, simple, and multifunctional improvements to the familiar conventional funnels that will cure their above-identified limitations—yet make them affordable, portable, and easy for virtually everyone to use. The present invention is intended to meet this need fully.
SUMMARY OF THE INVENTIONThe principal object of this invention is to provide a funnel that enables pouring of a fluid through it without splash-out.
This object is realized by providing an improved funnel that has a rimmed bowl for receiving a flow of fluid from a contributing source and, contiguous with and below the bowl, a spout for gravitationally conveying the received fluid into a receiving container, wherein the improvement comprises:
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- a smoothly curved-in lip provided at the bowl rim, to prevent the flowing fluid from splashing out of the bowl by redirecting any fluid that reaches the curved-in lip inwardly from the rim back into the bowl.
A related object of this invention is to provide an improved funnel that has a rimmed bowl for receiving a flow of fluid from a contributing source, and contiguous with and below the bowl a spout for gravitationally conveying the received fluid into a receiving container, wherein the improvement comprises:
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- a smoothly curved-in lip provided at the bowl rim, to prevent the flowing fluid from splashing out of the bowl by redirecting any fluid that reaches the curved-in lip inwardly from the rim back into the bowl,
- wherein the orientation of the spout relative to the bowl is adjustable so that the spout may be inclined relative to the bowl to better cooperate with an inclined mouth of a receiving container.
A further object of this invention is to provide an improved funnel that has a rimmed bowl for receiving a flow of fluid from a contributing source, and contiguous with and below the bowl a spout securely supported into the mouth of a receiving container and simultaneously facilitating venting of displaced air therefrom while guiding fluid therein, wherein the improvement comprises:
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- a smoothly curved-in lip provided at the bowl rim, to prevent the flowing fluid from splashing out of the bowl by redirecting any fluid that reaches the curved-in lip inwardly from the rim back into the bowl; and
- a plurality of outwardly extending vanes that are wider at their tops then at their bottom ends, provided evenly around the spout to enable secure fitting of the funnel to the receiving container.
An even further object of this invention is to provide an improved funnel that has a rimmed bowl for receiving a flow of fluid from a contributing source, and contiguous with and below the bowl a spout for gravitationally conveying the received fluid into a receiving container, wherein the improvement comprises:
-
- a smoothly curved-in lip provided at the bowl rim, to prevent the flowing fluid from splashing out of the bowl by redirecting any fluid that reaches the curved-in lip inwardly from the rim back into the bowl; and
- a plurality of recessed flutes provided in the bowl to promote Coriolis-acceleration-induced downward spiraling of fluid flow.
In another aspect of this invention there is provided a method for improving the guided flow of a fluid poured from a contributing source thereof into a receiving container without undesirable splash-out of the fluid from the funnel during use.
This object is realized by providing a method comprising the step of:
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- providing at the bowl rim a smoothly curved-in lip to intercept and return back into the bowl any fluid seeking to splash out over the rim due to unstable flow conditions in the funnel during use.
These and other related objects of this invention will be better understood upon reference to the appended drawings and the detailed description of the invention below.
The improvements presented and claimed below are intended to be selectively applicable, individually or in combination with each other, to funnels of a variety of shapes and sizes, to counter splash-out from them of a variety of fluids—over a wide range of fluid viscosities.
Funnel 100 per
According to the first embodiment of this invention, as best seen in
In typical use, spout 106 is easily insertable into the relatively larger mouth of a receiving container; and funnel 100 then rests essentially upright with a lower part of conical bowl 102 seated thereon. Improved funnel 200 is employed similarly.
As best seen in
Even if the contributing flow comes from a nozzle or pipe, e.g., from a gasoline pump or household water supply, and there is less pulsating flow, the splash-out problem remains because the flow dynamics within the bowl are inherently unstable.
As best seen in
Average outflow 406 from improved funnel 200 will thus be the same as average inflow 300. In contrast, the conventional funnel average outflow 306 would be less than the average inflow 300 by the loss due to splash-out 308. Even if the splash-out is relatively small, and even if this is of no great economic consequence, it will incur expenditures of time, effort, and cleanup costs—all of which will depend on how dangerous or problematic the splashed-out fluid is.
Most plastics funnels are made by known, highly adaptable, equipment and processes; hence the proposed improvement of adding a turned-in lip at the funnel rim should be very easy to make with no significant increase in needed material or manufacturing cost. The turned-in lip will work perfectly well with most free-flowing liquids like water and gasoline if it is made to extend inward by about 0.1 to 0.5 in. from the immediately adjacent inner surface of bowl 200. The improved funnel is also very easy to clean up for future reuse.
Experiments with very substantial flows of water from a faucet demonstrate that a turned-in lip of only 0.2 inches totally prevents splash-out from a funnel bowl of about 4.0 in. diameter and out through a throat of about 0.7 in. diameter. Quite unexpectedly, when the same improved funnel was used to transfer shelled “jumbo” peanuts from a large jar into a container with a mouth of about 1.0 in. diameter it worked equally well—any peanuts that sought to escape “by splash-out” over the front of the funnel were promptly returned back into the bowl. This clearly establishes that the proposed improvement should have potentially wide utility in improving funneled transfers of liquids, free-flowing slurries, non-sticky particulates like dry sand, seeds (including peanuts!), and the like.
Funnels for common use are marketed at retail outlets individually, and sometimes in sets of three or more. The proposed improvement, per
The proposed improvement to conventional funnel 500, to counter the tendency of poured fluid to splash-out from it, is best understood with reference to
As best seen in
As best seen in
Funnel 900 is provided with a flat coaxial circular collar 908 at about the location of the funnel throat 910. Immediately below collar 918 is provided a concertina-type segment 912 of the spout, and this is contiguous with the usual slightly conical elongate spout portion 914 below it. Concertinaed segment 912 allows a user to restorably adjust alignment of bowl 902 with respect to spout portion 914 and, to a small extent, their relative separation as well.
Below concertinaed segment 912, around portion 914 of the spout are provided a plurality of outwardly extending rhomboidal vanes 916 that are wider at their top ends than at their bottom ends. This is best seen in
Vanes 916 are separated by inter-vane spaces whose individual dimensions will depend in part on how many vanes are provided. Between four and eight vanes 916 should serve well for most applications, and this means that there is a very commodious passage available between adjacent vanes 916 for air to vent out of receiving container 920 as it is being filled. This air flow is indicated by triple-headed arrows in both
The above-discussed funnel 900 thus counters splash-out at its curved-in rim 904, fits securely to a receiving container 920 (meaning that it is not likely to easily tip over), adjusts the orientation of bowl 902 relative to spout 914, and allows easy venting of displaced air 926 during use.
Note that collar 908, by itself, could have been used to locate funnel 900 at rest over mouth 918 under two conditions: first, if there had been no vanes on spout 914; and, second, if all the vanes 916 had been pushed right in past mouth 918 or were too small to forcibly engage with mouth 918.
The benefits provided by vanes 916 to funnel 900 can be realized on existing conventional “vaneless” funnels, e.g., 100 or 500, by a very simple expedient best understood by reference to
As indicated in the cross-sectional view of
As most of us have observed, when water drains out of a sink in the U.S. (actually, anywhere in the northern hemisphere) it tends to spiral clockwise downward. This is due to the effect of Coriolis acceleration, and is caused by interaction of the Earth's axial spin and the downward velocity of the flowing fluid toward the center of the Earth. An associated consequence of this effect is that the outflow from the sink speeds up. This naturally occurring phenomenon can be beneficially employed to speed up outflow from any funnel by providing it structure that will cause it to spiral the way the Coriolis effect wants it to go.
As best seen in
Various very simple but multi-functional structural improvements have been disclosed herein to improve the safe utility of conventional funnels. With inexpensive plastics materials, and easily-adapted manufacturing technology, it should therefore be highly desirable and easy to include some or all of these improvements even in disposable funnels.
The benefit of countering splash-out by providing a funnel rim with a curved-in lip can be optimally realized by the structures shown in
As best seen in
A similar snap-on rim can easily be designed for use on funnel bowls of other than circular shapes in obvious manner to obtain the same benefit.
It should also be obvious that such snap-on rims, once affixed to corresponding funnels, can be left on permanently. If appropriate, once used on disposable funnels they can be disposed of just as easily.
As best seen in
The snap-on rim 1304 allows a user of a conventional funnel to enjoy the benefits of a curled-in lip, as previously described. Similarly, the benefits of secure engagement between the funnel and the mouth of a receiving container, together with easy venting of displaced air from the latter during funnel use, can also be realized with a conventional funnel by a simple slip-on spacer 1500, best seen in
For use, spacer 1500 should be forced onto the spout of the funnel; with inner vanes 1508 bending a little, as needed, to ensure a firm grip on the outside surface of the spout. The combination of spacer 1500, so mounted on the funnel, will now allow the funnel to be securely held in the mouth of a receiving container exactly as described in relation to slip-on element 1100 previously. The principal difference between slip-on element 1100 and spacer 1500 is that while both can be sized to fit the spout of any particular funnel, the presence of outer vanes 1506 and inner vanes 1508 makes the latter more useful in enabling use of the funnel with much larger mouthed receiving containers.
A somewhat differently structured spacer 1600 for the same purposes is shown in
The various simple, inexpensive, structural improvements described above, utilized individually or in different combinations, will reduce undesirable splash-out that might otherwise pose problems for users of either disposable or reusable, large or small, plastics or metal, inexpensive or high-cost, funnels for a variety of applications involving fluids of many kinds.
Persons of ordinary skill in the related arts will no doubt find obvious variations and useful combinations of the numerous improvements disclosed herein. All such modifications are intended to be comprehended within the claims appended below.
Claims
1. An improved funnel, having a rimmed bowl for receiving a flow of a fluid
- from a contributing source and, contiguous with and below the bowl, a spout for conveying the received fluid flow into a receiving container, wherein the improvement comprises:
- a smoothly curved-in lip provided at the bowl rim, to prevent flowing fluid from splashing out of the bowl by redirecting the same inwardly from the rim back into the bowl.
2. The improved funnel according to claim 1, wherein:
- the curved-in lip is made integral with the bowl.
3. The improved funnel according to claim 1, further comprising:
- a detachable rim element, snap-fit closely to the bowl, comprising the smoothly curved-in lid.
4. The improved funnel according to claim 1, wherein:
- the curved-in lip extends inwardly from the rim by a distance about 0.1 to 0.5 inches from the immediately adjacent interior surface of the bowl.
5. The improved funnel according to claim 1, further comprising:
- an outwardly extending peripheral collar, located close to a junction between the bowl and the spout, to provide upright support for the funnel when the collar is placed on top of an opening of the receiving container during use.
6. The improved funnel according to claim 5, further comprising:
- a plurality of through apertures formed in the collar adjacent to the spout to facilitate out flow of air displaced from the receiving container during use of the funnel.
7. The improved funnel according to claim 1, wherein:
- the spout comprises a flexible portion whereby an orientation of the bowl relative to the spout is adjustable.
8. The improved funnel according to claim 1, further comprising:
- a flexible concertina-shaped segment provided in the spout adjacent the bowl, to enable adjustment of the disposition of the bowl relative to the spout.
9. The improved funnel according to claim 6, further comprising:
- the spout comprises a flexible portion whereby an orientation of the bowl relative to the spout is adjustable.
10. The improved funnel according to claim 1, further comprising:
- a plurality of outwardly extending longitudinal vanes that are wider at their top ends than at their bottom ends, provided evenly around the spout to enable secure fitting of the funnel to an opening of the receiving container.
11. The improved funnel according to claim 9, further comprising:
- a plurality of outwardly extending longitudinal vanes that are wider at their top ends than at their bottom ends, provided evenly around the spout to enable secure fitting of the funnel to an opening of the receiving container.
12. The improved funnel according to claim 10, wherein:
- the vanes are made integral with the spout.
13. The improved funnel according to claim 9, further comprising:
- a first multi-vaned slip-on element, having an open mildly-conical body shaped and sized to fit closely to the spout and provided with a plurality of outwardly extending vanes that are sized and shaped to be securely fitted into the mouth of a receiving container to support the funnel bowl in a selected orientation during use of the funnel.
14. The improved funnel according to claim 9, further comprising:
- a second multi-vaned slip-on element, having an open body with a plurality of inwardly extending vanes that are sized and shaped to securely fit to outside of the spout and a plurality of outwardly extending vanes that are sized and shaped to be securely fitted into the mouth of a receiving container to support the funnel bowl in a selected orientation during use of the funnel.
15. The improved funnel according to claim 9, further comprising:
- a third multi-vaned slip-on element, having an a longitudinally corrugated body and a plurality of outwardly extending vanes that are sized and shaped to be securely fitted into the mouth of a receiving container to support the funnel bowl in a selected orientation during use of the funnel.
16. The improved funnel according to claim 1, further comprising:
- a plurality of recessed flutes provided in the bowl to promote Coriolis-acceleration-induced downward spiraling of fluid flow.
17. The improved funnel according to claim 6, further comprising:
- a plurality of recessed flutes provided in the bowl to promote Coriolis-acceleration-induced downward spiraling of fluid flow.
18. The improved funnel according to claim 16, further comprising:
- the spout comprises a flexible portion whereby an orientation of the bowl relative to the spout is adjustable.
19. The improved funnel according to claim 18, further comprising:
- a plurality of outwardly extending longitudinal vanes that are wider at their top ends than at their bottom ends, provided evenly around the spout to enable secure fitting of the funnel to an opening of the receiving container.
20. The improved funnel according to claim 18, further comprising:
- a detachable rim element, formed to snap-fit closely to the bowl rim and to provide the smoothly curved-in lip thereat.
21. The improved funnel according to claim 19, further comprising:
- a first multi-vaned slip-on element, having an open mildly-conical body shaped and sized to fit closely to the spout and provided with a plurality of outwardly extending vanes that are sized and shaped to be securely fitted into the mouth of a receiving container to support the funnel bowl in a selected orientation during use of the funnel.
22. A method of improving the guided flow of a fluid through a conventional funnel that has a rimmed bowl communicating through a throat with a spout positioned below, from a contributing source of the fluid into a receiving container of fluid, comprising the step of:
- providing at the bowl rim a smoothly curved-in lip to intercept and return back into the bowl any fluid seeking to splash out over the rim due to unstable flow conditions in the funnel during use.
23. The method according to claim 22, comprising the further step of
- providing a plurality of outwardly oriented vanes at the spout, sized and shaped to be fitted securely into the mouth of the receiving container to stabilize the funnel and to simultaneously vent displaced air from the receiving container during use of the funnel.
24. The method according to claim 22, comprising the further step of:
- providing a plurality of recessed flutes at the inside surface of the bowl to promote Coriolis-acceleration-induced flow through the funnel.
Type: Application
Filed: May 31, 2011
Publication Date: Dec 6, 2012
Inventor: Chittaranjan N. Nirmel (Warfordsburg, PA)
Application Number: 13/134,105
International Classification: B65B 39/00 (20060101);