Unitary check valve
First Claim
1. For use in a multiple component reactive fluid system having separate material cartridges with respectively separate adjacent paired outlet nozzles, and a mixing tube having inlet structure sealed over the paired-nozzles and communicating via an interconnecting cavity with mixing structure and a single outlet downstream therefrom, to provide for composite reactive material discharge from said single outlet, a unitary piece check valve comprisinga generally flat base wall having openings spaced apart to correspond to the paired outlet nozzles, a partition wall upstanding from the base wall and crossing between the spaced openings, and flexible check structures cantilevered from the perimeter of each opening to overlie and normally close the opening;
- said flat base wall being adapted to seat over the paired outlet nozzles with the spaced openings communicating respectively therewith, and the partition wall being adapted to seat against the mixing tube inlet structure and divide the interconnecting cavity into two portions respectively communicating with the outlet nozzles and to baffle the outlet nozzles from one another other than via over the partition wall, andsaid check structures having shape memory effective to open only when the pressure in the material cartridge exceed the normal closing forces for allowing material flow therepast and through the mixing tube while yet restricting back flow of either material into either outlet nozzle.
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Accused Products
Abstract
A check valve disposed to fit between paired outlet nozzles of adjacent cartridges of a multiple component reactive fluid system and a mixing tube sealed over the nozzles and having a single outlet for discharging the mixed reactive material. The check valve has a flat portion and an upstanding wall formed therefrom, each sized and shaped to seat over the nozzles and against the mixing tube. Openings formed in the flat portion commumicate with the nozzles and provide separate flow paths of the respective materials to the mixing tube. Check structure as separate flaps integral with the wall cover and close the openings. The internal flap resilience normally holds the check valve closed, but allows flap flexture to open the outlet nozzle when the cartridge pressures exceed the closing forces. The check valve restricts back flow of either material into either outlet nozzle.
83 Citations
9 Claims
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1. For use in a multiple component reactive fluid system having separate material cartridges with respectively separate adjacent paired outlet nozzles, and a mixing tube having inlet structure sealed over the paired-nozzles and communicating via an interconnecting cavity with mixing structure and a single outlet downstream therefrom, to provide for composite reactive material discharge from said single outlet, a unitary piece check valve comprising
a generally flat base wall having openings spaced apart to correspond to the paired outlet nozzles, a partition wall upstanding from the base wall and crossing between the spaced openings, and flexible check structures cantilevered from the perimeter of each opening to overlie and normally close the opening; -
said flat base wall being adapted to seat over the paired outlet nozzles with the spaced openings communicating respectively therewith, and the partition wall being adapted to seat against the mixing tube inlet structure and divide the interconnecting cavity into two portions respectively communicating with the outlet nozzles and to baffle the outlet nozzles from one another other than via over the partition wall, and said check structures having shape memory effective to open only when the pressure in the material cartridge exceed the normal closing forces for allowing material flow therepast and through the mixing tube while yet restricting back flow of either material into either outlet nozzle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification