Dispensing – Processes of dispensing
Reexamination Certificate
2000-06-16
2001-09-18
Derakshani, Philippe (Department: 3754)
Dispensing
Processes of dispensing
C222S146600
Reexamination Certificate
active
06290097
ABSTRACT:
FIELD OF THE INVENTION
The invention relates to a mobile supply apparatus for delivering a viscous composition, such as a waterproofing composition to a work site and to methods of supplying such compositions to those work sites.
BACKGROUND OF THE INVENTION
The demand for application of waterproofing compositions to structural foundations such as residential and commercial buildings has increased dramatically over the last few years. Typically, these compositions comprise a viscous fluid containing elastomeric components in either an organic solvent or water base. These viscous compositions must be heated prior to application at the work site so that they will flow readily through the supply equipment and then, after application, dry to provide an elastomeric or rubbery waterproofing coating over the desired substrate.
Typically, the water proofing compositions are sprayed on the building foundation or other substrate by a hose and associated spray nozzle. The hoses and associated spray mechanisms are often plugged by deposition therein of hardened viscous masses of the composition.
It is therefore desirable to provide a mobile supply apparatus and system for carrying a sufficient quantity of waterproofing composition to the job site. It is even more desirable that the apparatus provide for on-site heating of the waterproofing composition so as to provide for lowered viscosity and commensurate improved fluid flow characteristics through the spray equipment.
It is even more desired to provide such a mobile supply apparatus wherein the hose and/or other composition applicator means may be heated prior to application of the waterproofing composition to the work site so as to soften and fluidize hardened masses within the hose or applicator.
SUMMARY OF THE INVENTION
These and other objects of the invention are met by the apparatus and method disclosed herein. Basically, the apparatus comprises a housing member that can be lifted via a forklift or hoist onto the flatbed of a truck or other motor vehicle. An insulated reservoir is provided in the housing for receipt of a sufficient quantity, such as greater than about 100 gallons, of the waterproofing composition therein.
A supply conduit is in fluid communication with the reservoir and is operatively associated with a pump so as to pump waterproofing composition from an upstream direction in the reservoir to a downstream direction through the hose and spray nozzle for application to the desired substrate. A heat exchanger is in fluid communication with the supply conduit and is adapted for flow of the waterproofing composition therethrough. Heat exchange fluid from the cooling system of the motor vehicle is forwarded to the heat exchanger in heat exchange relationship with the waterproofing composition. A valve is provided to readily connect the circulating heat exchange fluid from the cooling system of the vehicle to the heat exchanger.
The coolant or heat exchange fluid from the motor vehicle may also be first forwarded to a direct heating circuit through a heat exchanger coil located in the reservoir itself. This helps to soften and fluidize gel or gummy masses of the composition that have settled in the reservoir.
A hose or other applicator device is connected to the supply line downstream from the heat exchanger and is utilized to apply heated waterproofing composition to the required job site. The application or downstream end of the hose may be connected to a recycle conduit for recycling of heated waterproofing composition back into the reservoir. By utilization of the recirculation feature of the invention, the hose or other applicator can be pre-heated, prior to usage, by recirculation of heated waterproofing composition therethrough so that application of the waterproofing composition to the substrate can be substantially unimpeded through the hose or applicator device.
In another aspect of the invention, the housing is provided with an access compartment having a thermally conductive wall member contiguously bordering the reservoir. The hose or other applicator and the heat exchanger may be mounted in this compartment along the common wall or border. Accordingly, the heat from the heated waterproofing composition disposed in the reservoir acts to provide further heat via conduction or convection to the hose or applicator through this wall member. Further, due to location of the heat exchanger in close proximity to the hose or other applicator within the compartment, the heat exchanger itself provides heat, normally via convection to the applicator.
The housing further comprises a lift mounting receptacle such as pair of feet which are adapted for receipt of a forklift therein so that the entire unit may be readily lifted in or out of the motor vehicle.
In accordance with the method, a quantity of waterproofing composition is placed into the reservoir and is forwarded to the heat exchanger which, as aforementioned, is provided with the heat exchange fluid from the motor vehicle to thereby heat the waterproofing composition. The heated waterproofing composition from the heat exchanger is then pumped to a supply conduit wherein it may be selectively supplied to the work site or recirculated back into the reservoir.
Cooling water from the motor vehicle is used as the heat exchange fluid. It is first supplied to a valved, direct heating fluid circuit where it passes through heat exchange coils disposed in the reservoir. Next, the cooling fluid is forwarded to the previously described heat exchanger to again heat the waterproofing composition flowing therethrough. The heat exchange fluid is recirculated back to the cooling system of the motor vehicle.
The invention will be further described in conjunction with the appended drawings and following detailed description. dr
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1
is a perspective view of a mobile supply apparatus in accordance with the invention;
FIG. 2
is a schematic diagram showing the flow of waterproofing composition and heat exchange fluid;
FIG. 3
is a front elevational view of the apparatus of
FIG. 1
, with the access doors broken away for increased clarity; and
FIG. 4
is a sectional view of the apparatus shown in
FIGS. 1 and 3
taken along the plane represented by the lines and arrows
4
—
4
in FIG.
3
.
REFERENCES:
patent: 3561645 (1971-02-01), Hopkins
patent: 3841527 (1974-10-01), Von Roeschlaub
patent: 4443909 (1984-04-01), Cameron
patent: 4527712 (1985-07-01), Cobbs, Jr. et al.
patent: 4576122 (1986-03-01), Marcato
patent: 5983990 (1999-11-01), Alvarez
Biebel & French
Bui Thach H
Derakshani Philippe
Mar-Flex Systems, Inc.
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