A dispensing system includes a first chamber and a second chamber, where each chamber includes an inlet port configured to receive a flowable material and an outlet port configured to dispense the flowable material. The system also includes a first displacement rod slidably disposed in the first cha
A dispensing system includes a first chamber and a second chamber, where each chamber includes an inlet port configured to receive a flowable material and an outlet port configured to dispense the flowable material. The system also includes a first displacement rod slidably disposed in the first chamber. The system also includes a second displacement rod slidably disposed in the second chamber, wherein the first displacement rod is rigidly connected to the second displacement rod.
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1. A dispensing system, comprising: first and second chambers, each having an inlet port configured to allow flowable material to pass into said chamber and an outlet port configured to allow said flowable material to pass out of said chamber;a first displacement rod slidably disposed in said first
1. A dispensing system, comprising: first and second chambers, each having an inlet port configured to allow flowable material to pass into said chamber and an outlet port configured to allow said flowable material to pass out of said chamber;a first displacement rod slidably disposed in said first chamber, said first displacement rod having a displacement volume that is smaller than a total volume of said first chamber;a second displacement rod slidably disposed in the second chamber and configured to operate in coordination with said first displacement rod, said second displacement rod having a displacement volume that is smaller than a total volume of said second chamber;said first displacement rod being configured to force a volume of said flowable material that is substantially equal to said first displacement volume through the outlet port of the first chamber when said first displacement rod penetrates into said first chamber;said second displacement rod being configured to force a volume of said flowable material substantially equal to said second displacement volume through said outlet port of the second chamber when said second displacement rod penetrates into said second chamber; andwherein said first and second displacement rods have geometries that are configured to maintain open space between the first displacement rod and walls of the first chamber and between the second displacement rod and walls of the second chamber, such that flowable material can flow between said displacement rods and said walls from a first end of said displacement rod to a second end of said displacement rod. 2. The dispensing system of claim 1, wherein said first and second displacement rods are free of physical contact with said walls of said first and second chambers, respectively. 3. A dispensing system, comprising: first and second chambers, each having an inlet port configured to allow flowable material to pass into said chamber and an outlet port configured to allow said flowable material to pass out of said chamber;a first displacement rod slidably disposed in said first chamber, said first displacement rod having a displacement volume that is smaller than a total volume of said first chamber;a second displacement rod slidably disposed in the second chamber and configured to operate in coordination with said first displacement rod, said second displacement rod having a displacement volume that is smaller than a total volume of said second chamber;said first displacement rod being configured to force a volume of said flowable material that is substantially equal to said first displacement volume through the outlet port of the first chamber when said first displacement rod penetrates into said first chamber;said second displacement rod being configured to force a volume of said flowable material substantially equal to said second displacement volume through said outlet port of the second chamber when said second displacement rod penetrates into said second chamber; anda connecting rod that rigidly connects said first and second displacement rods. 4. The dispensing system of claim 3, wherein the displacement volume of the first displacement rod is larger than the displacement volume of the second displacement rod. 5. The dispensing system of claim 3, further comprising a drive rod rigidly connecting a motor to the first displacement rod to simultaneously actuate the first and second displacement rods. 6. The dispensing system of claim 3, wherein the displacement volume of the first displacement rod is approximately equal to the displacement volume of the second displacement rod. 7. The dispensing system of claim 3, wherein said first and second outlet ports are fluidly connected to a single common system outlet. 8. The dispensing system of claim 7, wherein said dispensing system is configured to cause said flowable material to alternatively flow from said first and second outlet ports to said system outlet so as to deliver a constant flow of said flowable material from said system outlet. 9. The dispensing system of claim 3, wherein the first and second displacement rods and the first and second chambers are cylindrical, and the first and second displacement rods have diameters that are sufficiently less than the diameters of the first and second chambers so as to prevent physical contact between the first and second displacement rods and the first and second chambers, respectively. 10. The dispensing system of claim 3, wherein said connecting rod connects said first and second displacement rods using releasable connectors. 11. The dispensing system of claim 3, further comprising a first interchangeable seal disposed within an aperture of the first chamber and configured to receive the first displacement rod, and a second interchangeable seal disposed within an aperture of the second chamber and configured to receive the second displacement rod. 12. A dispensing system, comprising: first and second chambers, each having an inlet port configured to allow flowable material to pass into said chamber and an outlet port configured to allow said flowable material to pass out of said chamber;a first displacement rod slidably disposed in said first chamber, said first displacement rod having a displacement volume that is smaller than a total volume of said first chamber;a second displacement rod slidably disposed in the second chamber and configured to operate in coordination with said first displacement rod, said second displacement rod having a displacement volume that is smaller than a total volume of said second chamber;said first displacement rod being configured to force a volume of said flowable material that is substantially equal to said first displacement volume through the outlet port of the first chamber when said first displacement rod penetrates into said first chamber;said second displacement rod being configured to force a volume of said flowable material substantially equal to said second displacement volume through said outlet port of the second chamber when said second displacement rod penetrates into said second chamber;first and second pressure sensors configured to measure pressure levels in said first and second chambers, respectively; anda controller communicatively coupled to said pressure sensors, said controller configured to generate signals to control the flow of material in said dispensing system based at least partially on said pressure levels in said first and second chambers. 13. The dispensing system of claim 12, wherein the controller is further configured to perform at least one of the following: independently pre-pressurize each chamber; independently de-pressurize each chamber; monitor pressure in each chamber and compare the monitored pressures to preset limits for high pressure, low dispense pressure, reload pressure, pre-pressure, and de-pressure; and track material pressure during a dispense cycle. 14. A dispensing system, comprising: first and second chambers, each having an inlet port configured to allow flowable material to pass into said chamber and an outlet port configured to allow said flowable material to pass out of said chamber;a first displacement rod slidably disposed in said first chamber, said first displacement rod having a displacement volume that is smaller than a total volume of said first chamber;a second displacement rod slidably disposed in the second chamber and configured to operate in coordination with said first displacement rod, said second displacement rod having a displacement volume that is smaller than a total volume of said second chamber;said first displacement rod being configured to force a volume of said flowable material that is substantially equal to said first displacement volume through the outlet port of the first chamber when said first displacement rod penetrates into said first chamber;said second displacement rod being configured to force a volume of said flowable material substantially equal to said second displacement volume through said outlet port of the second chamber when said second displacement rod penetrates into said second chamber; anda first interchangeable seal disposed within an aperture of the first chamber and configured to receive the first displacement rod, and a second interchangeable seal disposed within an aperture of the second chamber and configured to receive the second displacement rod.
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