Patent Application
20130020405
1. Field of the Invention
The present invention relates to component proportioners for mixing materials, and more particularly, to portable plural component mixers for mixing materials for spray application of polyurethane and polyrea chemicals.
2. Description of the Prior Art
It is known in the relevant art to provide plural component proportioners and mixers for mixing materials including mechanical, and electromechanical versions that may be portable, i.e., including wheels for manually manipulating the proportioner to another location. Examples of relevant art publications include the following:
U.S. patent application Publication No. 2006/0071022 and PCT Publication No. WO/2004042484 for Fast Set Material Proportioner assigned according to the publication document as printed to Graco Minnesota, Inc. describing an electrically powered plural component proportioner that is transportable.
U.S. patent application Publication No. 2006/0144447 for Electronic proportioner using continuous metering and correction assigned according to the publication document as printed to Graco Minnesota, Inc. disclosing a method for dispensing materials in a plural component proportioner and illustrating a wheeled frame.
U.S. patent application Publication No. 2005/0023296 for Heated pump system for delivering multiple components in a predetermined ratio to a spray application by Bien describing a portable chemical proportioner with means for heating the chemical components, namely the use of heated hoses for application of the components, which may be drawn from chemical drums, and wherein the system may be transported on a frame that includes castors or other wheel assemblies for moving the system.
U.S. Pat. No. 4,809,909 for Plural component application system & U.S. Pat. No. 5,294,052 for Fluid dispensing system assigned according to the publication document to Glas-Craft Inc. describing a plural component application system for polyurethane applications, the system including means for heating the component materials and being mounted on a wheeled base.
U.S. patent application Publication No. 2005/0236422 for Portable apparatus for mixing and dispensing viscous materials by inventor Dutton disclosing a device for mixing and dispensing plural component materials, including at least two reservoirs for holding component materials and means for heating the materials, namely using heated hoses for dispensing components, and further describing a housing on wheels for containing the reservoirs and other aspects of the device.
U.S. Pat. No. 3,786,990 for a Plural component gun assigned according to the patent publication document to Graco Inc., by inventor Hagfors, disclosing a plural component spray gun and spraying system incorporating thermal insulated heated hoses and a support structure with a handle, bracing, and wheels that may be used to transport the system.
U.S. Pat. No. 4,332,498 for a sealant applicator invented by Lewis describing a sealant applicator for applying an elastomeric sealant made by mixing two components, and means for heating the components, and further describing a frame supported on wheels for moving the frame.
U.S. Pat. No. 6,896,152 and U.S. patent application Publication No. 2003/0015547 for Electronic plural component proportioner, assigned according to the patent document to Graco Minnesota, Inc. by inventors Pittman and Friedrich disclosing an apparatus for dispensing plural component materials illustrated as being supplied by a bucket, wherein the apparatus appears to be constructed and positioned on a wheeled platform stand.
U.S. Pat. No. 6,663,016 and U.S. patent application Publication Nos. 2003/0062427 and 2004/0227006 for an Applicator assembly for application of adhesives, sealants, and coatings assigned to Urecoats Technologies, Inc. according to the patent document by inventor Bien, describing an applicator system for melting, mixing, and applying a composition of one or more materials, and a heating system for heating components using heated hoses, the system being supported on a wheeled frame that is towable behind a vehicle.
Thus, the relevant prior art describes chemical proportioners supported by wheeled carts or frames, including dispensing or mixing systems with heated hoses.
The present invention relates to multi-component mixing devices, systems and methods therefor, which solve the problems associated with the prior art, including difficult portability due to imbalanced distribution of components of the system on the frame and wheel structure, and lack of insulation of the components, difficulty in replacing the chemical materials and heated hoses to keep the material at spray temperature.
It is an object of this invention to provide methods, systems and an apparatus for multi-component mixing and spray application, including a portable, balanced frame having uniformly distributed weight over the wheels, and insulated chemical bucket holders instead of chemical reservoir tanks, by contrast to the relevant prior art. Also, the invention makes use of heated hoses so that the chemicals stay at the precise temperature for spraying. Also, this invention can be utilizes a hose temperature control and a thermocouple temperature sensor so that the machine can be adjusted according to the material that is sprayed.
Accordingly, an embodiment of this invention is directed to an apparatus for multi-component mixing and spray application, including a portable, balanced frame having substantially symmetrically balanced and distributed weight of the insulated chemical bucket holders positioned on the frame over the wheel axle for the wheels mounted on the frame thereby.
These and other aspects of the present invention will become apparent to those skilled in the art after a reading of the following description of the preferred embodiment when considered with the drawings, as they support the claimed invention.
Referring now to the drawings in general, the illustrations are for the purpose of describing a preferred embodiment of the invention and setting forth a best mode, and are not intended to limit the invention thereto. Where the same element is illustrated in the various figures, the same reference indicia are used for those elements in all the figures.
The present invention provides systems, methods, and an apparatus for portable, multi-component mixing of materials for spray application, including polyurethane and polyurea two part chemical systems.
In preferred embodiments, the system for multi-component mixing and spray application includes a portable, balanced frame assembly further including a frame having uniformly distributed weight over an axle connecting two spaced-apart wheels, and insulated chemical container holders positioned symmetrically over the axle, the holders constructed and configured for receiving replaceable materials containers therein, and for maintaining them in predetermined heated or cooled states. Also, the system is designed to have both chemical hoses connected to the container holders, with the hose being constructed and configured for dispensing the materials out of five gallon pails which can be removed out of the within the container holders. A spray gun is attached to an end of the hose opposite the container connection, thereby providing for spray application of the heated chemical material. Preferably, the hose(s) provide for proportioned mixing of the materials in predetermined amounts from the containers.
For portability and manipulation of the device, the system and its frame apparatus includes a handle bar and ergonomically positioned handles that are spaced apart from each other and positioned on the frame at a predetermined height above the container holders. Preferably, the handle bar assembly is positioned directly above and aligned with the axle, and the handles extend substantially perpendicular thereto, thereby providing for easy rotational tipping of the frame assembly about the axle of the wheels.
In preferred embodiments, and as illustrated in the figures, the container housing further includes a supporting stand protruding downwardly which provides support and stability to the assembly when it is not being transported, and to prevent rotation of the assembly in the direction of the container holders.
Referring to
In the embodiment of an apparatus for mixing and applying multi-component materials, the following components are included: a portable, balanced frame assembly including a frame having uniformly distributed weight over an axle connecting two spaced-apart wheels, the axle connected to the lower portion of the frame, and two insulated material container holders fixedly attached to the frame and positioned substantially symmetrically over the axle, the holders having substantially cylindrical cavities disposed therein and constructed and configured for receiving replaceable materials containers therein; and a plurality of hoses connected to the container holders on a first end for supplying the materials from the containers through the hoses to corresponding spray gun at a second end of the hose(s) for spray-based application of the mixed materials; and at least one pump mechanism for moving the materials from the containers through the hoses. As with the system, the apparatus may further include a supporting bracket attached to the frame for supporting and stabilizing the apparatus and preventing rotation of the frame assembly around the wheel axle axis in the direction of the support, which is positioned opposite frame handles.
In methods of using the system and/or apparatus of the present invention, the following steps may be included for multi-component mixing and spray application, comprising the steps of: providing a portable, balanced frame assembly including a frame having uniformly distributed weight over an axle connecting two spaced-apart wheels, and insulated container holders positioned symmetrically over the axle, the holders constructed and configured for receiving replaceable materials containers therein, and for maintaining them in predetermined heated or cooled states; providing at least two materials in separate material containers positioned within the container holders; and activating pumps for pumping the materials from the containers through hoses; mixing the materials in predetermined proportions; and activating spray application of the mixed materials through a spray gun at the precise temperature required once the chemical has been delivered out of the gun. Additional steps of heating at least one of the components prior to mixing may be included as well.
Certain modifications and improvements will occur to those skilled in the art upon a reading of the foregoing description. The above-mentioned examples are provided to serve the purpose of clarifying the aspects of the invention and it will be apparent to one skilled in the art that they do not serve to limit the scope of the invention. All modifications and improvements have been deleted herein for the sake of conciseness and readability but are properly within the scope of the present invention.
