The present invention relates generally to the field of fluid dispensers, and more particularly fluid dispensers used in construction projects for the application of release agents to concrete forms. Even more specifically, the present invention pertains to a solar powered fluid dispenser for release agents which is readily transportable and has an extended reach capability for convenience of use.
The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.
Release agents are widely used in many industries to prevent the adhesion of one substance to another. In the concrete construction industry, form release agents are commonly employed to prevent the adhesion of freshly placed concrete to the forming surface, which is typically constructed of plywood, overlaid plywood, steel or aluminum. Some release agents, known as “barrier” release agents, are designed to form a non-stick barrier between the concrete and forming surface. Others release agents are intended to induce a chemical reaction with the free limes of the concrete, thus creating a slippery film which prevents adhesion to the concrete forms.
Concrete release agents generally come in the form of a liquid and are conventionally applied to the surface of the concrete forms via the use of small commercial grade 1-3.5 Gal. capacity hand pump sprayers, such as that manufactured by Chapin International, Inc. The release agent, however, is typically delivered to the contractor in bulk, oftentimes in significantly larger containers, such as in a 55 Gal. drum, or even larger. Consequently, when working at a construction site, the contractor must repeatedly open and close the smaller hand held sprayers to refill the contents of the sprayer containers. For a typical construction job site, multiple hand pump sprayers are normally used to apply the release agent before pouring the concrete. While the smaller hand pump sprayers do provide flexibility by way of portability, they can be heavy, cumbersome to use, and require constant servicing which creates undesirable logjams in the construction project as a whole.
One common problem associated with the use of the smaller hand pump sprayer is contamination of the contents of the sprayer caused by repeated opening and closing of the sprayer container. When one of the smaller sprayers needs to be refilled, its fluid storage tank must be opened to allow additional release agent fluid to be pumped into the tank from a larger on-site bulk storage container. Each time this occurs, dirt, bugs and other potential contaminants are able to enter the spraying system, thus contaminating and eventually clogging the sprayer. With the considerable amount of dirt at a typical construction site, this problem can be significant. As the contaminants work their way through the sprayer wand, either partial or complete obstruction of the wand passageway and/or sprayer nozzle can occur. This causes uneven broadcasting of the release agent upon the concrete forming surface and eventual failure of the spraying equipment, requiring significant downtime for repair.
Furthermore, most conventional hand pump sprayers are pressurized by introducing air into the tank through an associated hand pump plunger mechanism. Repeated actuation of the hand pump plunger also causes the introduction of airborne contaminants into the fluid storage chamber, which further contaminates the sprayer system, resulting in the need for time consuming, costly repairs of the sprayer. Since conventional hand pump sprayers require continued pumping of the plunger mechanism to maintain internal pressure, potential clogging contaminants are continually being introduced into the spraying system. With multiple hand pump sprayers being used on each job site, there are even more opportunities for equipment failure. Such problems have an exacerbating trickle-down effect on all aspects of the construction project, leading to additional costly delays as the result of equipment failure, required repairs, etc.
In addition to the above, for large construction projects, the concrete forms are usually moved into position using a large crane. This not only facilitates ease in placement of the relatively large, heavy forms, but it also maintains the forms in an upright position so as to avoid dirt and other contaminants from contacting the forming surface. However, conventional hand pump sprayers are typically designed to be relatively small in compass such that they can be carried by the user and hand operated. Consequently, the spraying wand and connecting hose of the sprayer are usually relatively short, with limited reach. While beneficial for sprayer compactness, this complicates the application process of the release agents. With such limited reach, oftentimes it becomes extremely difficult for the user to apply a consistent, even coating of the release agent near the upper portions of the concrete forms. This can result in undesirable sticking of the concrete to the forming surface and an inferior end product.
Similarly, in order to apply a consistent, even coating of the release agent to the forming surface of a concrete form, it is desirable to maintain constant pressure within the sprayer. Without consistency of pressure, the broadcast spray will weaken and vary in consistency, thus leading to an uneven application or pattern of the release agent. With conventional hand pump sprayers, however, such consistency is difficult to sustain because they require continued hand pumping to maintain adequate internal pressure within the sprayer's fluid storage chamber. As pressure decreases within the fluid storage tank, the application of the release agent will vary in consistency, thus again leading to undesirable sticking of the concrete to the forming surface and an inferior end product.
Another problem associated with conventional sprayers is that substantial amounts of the release agent fluid can be lost during the application process when windy conditions are present at a construction site. The sprayer wands are designed to dispense the fluid in a fine mist pattern so as to spread the release agent evenly, but much of it often blows away in the wind, never reaching the target concrete form upon which it is to be applied.
For all of the foregoing reasons, it is evident that there is a significant need in the construction industry for an improved system for applying release agents to concrete forms which maintains the benefit of the portability of smaller hand pump sprayers, yet eliminates or significantly reduces the substantial problems associated with the introduction of contaminants into the spraying system. It would also be beneficial for such a system to have an extended reach capability and self-contained power system to facilitate mobility and application of a consistent coating of release agents to the concrete forms.
It is a primary object of the present invention to provide an improved dispensing device for the application of release agents to concrete forms which eliminates the need for the use of hand pump sprayers and the associated contamination problems therewith.
Another object of the present invention is to provide an improved portable dispensing system for concrete release agents which is designed to pump directly from a bulk fluid holding container utilizing a self-contained pump and power source connected thereto.
It is a further object of the present invention to utilize solar power to operate such a portable dispensing system so that a continuous supply of consistent energy can be maintained to operate a motorized pump of the system.
Still another object of the present invention is to provide a self-contained solar powered portable dispensing device that may be transported with a bulk supply of release agent fluid via pallet, so as to eliminate the need for continual refilling of smaller hand pump sprayers.
Still further, it is another object of the present invention to provide a portable release agent dispenser which has an extended wand assembly and long coilable hose to enhance the reach of such dispenser and facilitate consistent coating of the release agent to all portions of the forming surface upon which it is applied.
In furtherance of the foregoing objectives, and others, the present invention includes a large capacity bulk container (e.g., 55 Gal. drum) of a fluid concrete release agent mounted upon a supporting base, such as a pallet, that may be lifted for transportability about a construction site via the use of a skid loader or the like. Connected in sealed relation to and extending into the drum is an elongated fluid conveyance member, such as a suction hose, that is connected through a filtering device to the inlet of a 12 volt DC pump which operates a fluid dispensing wand. The outlet of the pump is fluidly connected to a hose reel upon which an extended (e.g. 100 ft.) dispensing hose is coiled and connected. The fluid dispensing wand, which is also preferably elongated (e.g., 4-12 ft.), is then connected to the free end of the dispensing hose.
To power the fluid pump of the system, a rechargeable 12 volt battery is provided, to which a solar panel is electrically connected as a source of constant renewable energy for charging the battery. The rechargeable battery is carried by the same supporting base as the bulk release agent container, and the solar panel, fluid pump and hose reel are all similarly mounted upon a frame assembly that is carried by the supporting base. Consequently, the entire concrete release agent dispensing system is incorporated upon the transportable supporting base as a self-contained unit.
With the 12 volt pump attached via a suction hose directly to the bulk container of release agent fluid, the connection is fluidly sealed and there is no need to continually open and replenish the dispensing device, as with conventional hand pump sprayers. Moreover, contaminated pressurized air no longer needs to be introduced into the dispensing system, as the 12 volt DC pump creates a negative pressure drawing the fluid up one side and a positive pressure on the opposite side to operate the dispensing wand. Consequently, there is little chance for contamination to enter the fluid dispensing system.
The wand assembly may be outfitted with a conventional spray nozzle attachment or, for use in more windy conditions, an optional mop-like dispensing element for applying the release agent to the surface of the concrete form. The 12 volt pump also creates a more constant pressure within the dispensing system, thus providing more consistency in the application of the release agent fluid to the forming surface of the concrete form. With less contamination and greater consistency in applying the release agent, fewer operators are necessary and less down time is required for repairs to the dispensing equipment. A more consistent application of the release agent helps to reduce the amount of fluid used on a construction project, further adding to the savings.
The solar panel and rechargeable battery carried on the support base with the bulk dispensing device functions to provide a constant, cost efficient source of renewable energy to power the fluid dispenser without the need for AC power, electrical cords, gas-powered generators, or the like. The entire unit may be self-contained on a readily movable pallet or the like, thus providing complete portability about the construction site. With the extended 100+ foot dispensing hose and extra-long wand assembly, the operator may cover larger areas of the forms in much less time and with greater ease.
The foregoing and additional features and advantages of the present invention will be more readily apparent from the following detailed description. It should be understood, however, that the description and specific examples herein are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way.
The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, or uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or corresponding parts and features.
With reference now to the drawings, and particularly to
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Pump 33 is contemplated to be a twelve (12) volt DC pump, which is powered by a rechargeable battery 53 carried by and secured to the supporting base member 3. As shown in
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In use, the main shutoff valve 77 is normally open to allow the release agent fluid to flow into hose 43 carried on the hose reel 41. If it is desired to fill other smaller sprayers or flush the fluid dispenser 1, the shutoff valve 77 may be closed and valve 85 opened to pump fluid through the drain tube 83. When not in use, drain tube 83 may be stored in holder 87 which is affixed to a side portion of frame 21.
In a preferred embodiment, pump 33 is designed as an on-demand pumping system, such that pump 33 will operate only upon actuation of the handle trigger 69 on the dispensing wand 47. When the trigger 69 is released, pump 33 is designed to shut off, thus conserving the electrical energy produced by the rechargeable battery 53. With such an on-demand pumping system, the pump 33 is designed to sense the drop in fluid pressure produced by actuation of the dispensing wand trigger 69, thus activating pump 33. Upon release of trigger 69, the fluid pressure in pump 33 equalizes, thereby causing pump 33 to cease operation.
Although the use of an on-demand pumping system is preferred in that it will help conserve the electrical energy of the solar powered battery 53, it is also contemplated that pump 33 could be designed with a fluid bypass system which would allow pump 33 to continue running at all times the on/off switch 59 is switched to the “on” position. In such case, the pump 33 would continue to run regardless of whether the handle trigger 69 of the dispensing wand 47 is actuated or released. Of course, it will be understood by those skilled in the art that other possible configurations of the pumping system for the fluid dispensing unit 1 may be available for actuating the dispensing wand 47 without departing from the scope of the invention disclosed herein.
As noted previously, with the pump 33 being attached via connecting hoses 37 and 38 in fluidly sealed relation to suction tube 13 and bulk container 7 of release agent fluid, there is no need to continually open and replenish the contents of the fluid dispensing device. Therefore, contaminated pressurized air needs not be introduced into the dispensing system, as with conventional hand pump sprayers. The present dispensing device 1 is self-contained and remains sealed from the outer atmosphere. The twelve (12) volt DC pump 33 creates a negative pressure at its input to draw the release fluid out of container 7, and an opposite positive pressure at its output to operate the dispensing wand 47. Consequently, there is little chance for any contamination to enter the fluid dispensing system 1.
Moreover, with the solar panel 57 and rechargeable battery 53 being carried on the support base 3 with the bulk container 7, a constant, cost efficient source of renewable energy is readily available at all times to power pump 33 of the dispenser 1. Consequently, pump 33 creates a more constant pressure within the dispensing system 1 than conventional hand pump sprayers, thus providing more consistency in the application of the release agent fluid to the forming surface of the concrete form 65 (see,
By incorporating solar panel 57 and a solar powered rechargeable battery 53 as a source of readily renewable energy, pump 33 may be electrically energized without the need for long connecting electrical cords, gas-powered generators, or the like. Accordingly, the entire fluid dispensing unit 1 may be self-contained on a readily movable pallet 3 or the like, thus providing complete portability about the construction site using commonly employed construction equipment, such as a skid loader. With the extended 100+ foot dispensing hose 43 and extra-long wand assembly 47, the operator may cover larger areas of the forms 65 in much less time and with greater ease.
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The disclosure herein is intended to be merely exemplary in nature and, thus, variations that do not depart from the gist of the disclosure are intended to be within the scope of the disclosure. Therefore, it will be understood that various changes may be made in the form, details, arrangement and proportions of the parts without departing from the scope of the invention, which comprises the matter shown and described herein and set forth in the appended claims.
This application is a nonprovisional application which claims the benefit of U.S. Provisional Application Ser. No. 62/554,891, filed on Sep. 6, 2017, the contents of which is hereby incorporated by reference herein in its entirety.
Number | Date | Country | |
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62554891 | Sep 2017 | US |