Crossover prevention valve
First Claim
1. A crossover prevention valve for a multi-component fluid mixing and dispensing system, said crossover prevention valve comprising:
- a valve body defining first and second fluid passageways therethrough, said first and second fluid passageways having respective upstream end portions and downstream end portions, said valve body having a perimeter body surface directly connecting a forward body surface and a rearward body surface of said valve body;
wherein said upstream end portions of said first and second fluid passageways are configured to sealingly receive respective fluid outlet nozzles of the multi-component fluid mixing and dispensing system, whereby pressurized fluids exiting the fluid outlet nozzles are received at said valve body only by respective ones of said first and second fluid passageways, wherein each one of said fluid passageways of said valve body comprises an enlarged-diameter region disposed between said upstream and downstream end portions and configured to receive a respective enlarged-diameter flange of a respective one of the fluid outlet nozzles to releasably secure said valve body at said fluid outlet nozzles;
first and second one-way check valves positioned at respective ones of said downstream end portions of said first and second fluid passageways, each of said first and second one-way check valves defining a respective fixed flow axis and configured to direct the respective pressurized fluids along said respective fixed flow axes;
wherein said first and second one-way check valves are biased closed to prevent fluid flow through respective ones of said first and second fluid passageways by elevated fluid pressure in an area forward of said valve body relative to a fluid pressure in said first and second fluid passageways;
wherein said forward body surface of said valve body is configured to define a rearward portion of a fluid mixing chamber of the multi-component fluid mixing and dispensing system; and
wherein said perimeter body surface of said valve body is configured to sealingly and releasably engage an inner wall portion of a dispensing nozzle fitted over said valve body.
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Accused Products
Abstract
A crossover prevention valve for use in a multi-component fluid mixing and dispensing system includes a valve body defining at least two fluid passageways having respective one-way check valves at their outlet ends. A forward end of the valve body cooperates with an interior surface of a dispensing nozzle to define a mixing chamber for chemically reactive fluids prior to discharging the mixed fluids out of the dispensing nozzle. The crossover prevention valve does not permit reverse flow, thereby preventing clogs due to undesired intrusion of one reactant into the flow path of another reactant. Solidified reactants left in the mixing chamber are easily removed from the valve body, permitting the valve body to be reused even after sitting for extended periods.
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Citations
17 Claims
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1. A crossover prevention valve for a multi-component fluid mixing and dispensing system, said crossover prevention valve comprising:
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a valve body defining first and second fluid passageways therethrough, said first and second fluid passageways having respective upstream end portions and downstream end portions, said valve body having a perimeter body surface directly connecting a forward body surface and a rearward body surface of said valve body; wherein said upstream end portions of said first and second fluid passageways are configured to sealingly receive respective fluid outlet nozzles of the multi-component fluid mixing and dispensing system, whereby pressurized fluids exiting the fluid outlet nozzles are received at said valve body only by respective ones of said first and second fluid passageways, wherein each one of said fluid passageways of said valve body comprises an enlarged-diameter region disposed between said upstream and downstream end portions and configured to receive a respective enlarged-diameter flange of a respective one of the fluid outlet nozzles to releasably secure said valve body at said fluid outlet nozzles; first and second one-way check valves positioned at respective ones of said downstream end portions of said first and second fluid passageways, each of said first and second one-way check valves defining a respective fixed flow axis and configured to direct the respective pressurized fluids along said respective fixed flow axes; wherein said first and second one-way check valves are biased closed to prevent fluid flow through respective ones of said first and second fluid passageways by elevated fluid pressure in an area forward of said valve body relative to a fluid pressure in said first and second fluid passageways; wherein said forward body surface of said valve body is configured to define a rearward portion of a fluid mixing chamber of the multi-component fluid mixing and dispensing system; and wherein said perimeter body surface of said valve body is configured to sealingly and releasably engage an inner wall portion of a dispensing nozzle fitted over said valve body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A crossover prevention valve for a multi-component fluid mixing and dispensing system, said crossover prevention valve comprising:
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a reusable valve body having a forward body surface, a rearward body surface spaced from said forward surface, and a perimeter body surface directly connecting said forward and rearward surfaces, wherein said forward body surface is configured to define a rearward portion of a fluid mixing chamber, and wherein said perimeter body surface of said valve body is configured to sealingly and releasably engage an inner wall portion of a dispensing nozzle that defines a forward portion of said fluid mixing chamber; first and second fluid passageways extending through said valve body, each of said first and second fluid passageways including an inlet proximate said rearward body surface and an outlet proximate said forward body surface; and first and second valves positioned at respective ones of said outlets of said first and second fluid passageways; wherein said first and second valves are operable to permit fluid flow through respective ones of said first and second fluid passageways in response to an elevated fluid pressure in said first and second fluid passageways relative to a fluid pressure in said fluid mixing chamber; and wherein said first and second valves are configured to contract from an open position to a closed position by elevated fluid pressure in said fluid mixing chamber relative to a fluid pressure in said first and second fluid passageways to prevent fluid flow through respective ones of said first and second fluid passageways. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A crossover prevention valve for a multi-component fluid mixing and dispensing system, said crossover prevention valve comprising:
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a reusable valve body having a forward body surface, a rearward body surface spaced from said forward surface, and a perimeter body surface directly connecting said forward and rearward surfaces, wherein said forward body surface is configured to cooperate with a mixing nozzle to define a fluid mixing chamber, and wherein said perimeter body surface of said valve body is configured to sealingly and releasably engage an inner wall portion of said fluid mixing chamber; first and second fluid passageways extending through and defined by said valve body, said first and second fluid passageways having respective upstream end portions and downstream end portions, wherein said first and second fluid passageways are configured to sealingly receive respective fluid outlet nozzles of the multi-component fluid mixing and dispensing system, whereby pressurized fluids exiting the fluid outlet nozzles are received at said valve body only by respective ones of said first and second fluid passageways, wherein each of said fluid passageways of said valve body comprises an enlarged-diameter region disposed between said upstream and downstream end portions and configured to receive a respective enlarged-diameter flange of a respective one of the fluid outlet nozzles to releasably secure said valve body at said fluid outlet nozzles; and first and second one-way check valves positioned at respective ones of said downstream end portions of said first and second fluid passageways, each of said first and second one-way check valves defining a respective fixed flow axis and configured to direct the respective pressurized fluids along said respective fixed flow axes.
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Specification