Method and system for high viscosity pump
View Patent ↗Embodiments described herein provide systems and methods for high viscosity pumps including a noncompliant filter. One embodiment can include a multi-stage pump comprising an pump inlet flow path, a pump outlet flow path, a feed stage in fluid communication with the pump inlet flow path, a dispense stage in fluid communication with the feed stage and the pump outlet flow path, a noncompliant disposable filter for high viscosity fluid in a flow path between the feed stage and the dispense stage and a set of valves to selectively allow fluid flow through the multi-stage pump.
1. A multi-stage pump comprising:
a dispense block defining a pump inlet flow path, a pump outlet flow path, at least a portion of a feed chamber and at least a portion of a dispense chamber, a flow path from the feed chamber to a first dispense block filter port and a flow path from a second dispense block filter port to the dispense chamber;
a feed stage diaphragm movable in the feed chamber;
a dispense stage diaphragm movable in the dispense chamber;
a feed stage piston contacting the feed stage diaphragm;
a dispense stage piston contacting the dispense stage diaphragm;
a feed stage motor coupled to the feed stage piston;
a dispense stage motor coupled to the dispense stage piston;
a quick change filter manifold configured to allow replacement of filters without screws, the quick change filter manifold comprising spaced guides rotatable relative to the dispense block;
a noncompliant disposable filter for high viscosity fluid in a flow path between the feed stage and the dispense stage, the noncompliant disposable filter comprising:
a bowl portion at least partially defining a filter cavity sized to fit between the spaced guides;
a head portion compatible with the quick change filter manifold, the head portion sized to rest on the spaced guides and the head portion comprising an inlet port and an outlet port, wherein the inlet port is configured to mate with the first dispense block filter port and the outlet port is configured to mate with the second dispense block filter port, and wherein the spaced guides are configured to rotate to couple and decouple the noncompliant disposable filter from the dispense block without screws; and
a set of valves to selectively allow fluid flow through the multi-stage pump.
2. The multi-stage pump of claim 1 , wherein the multi-stage pump is noncompliant.
3. The multi-stage pump of claim 1 , wherein the multi-stage pump comprises a unitary dispense block formed of a single piece of material.
4. The multi-stage pump of claim 3 , wherein the dispense block further defines a flow path from a third filter port to an outlet and the head portion defines a vent port configured to mate with the third filter port.
5. The multi-stage pump of claim 1 , wherein the disposable filter exhibits less than a 2 mL change in volume at 65 psi.
6. The multi-stage pump of claim 1 , wherein the disposable filter exhibits less than a 1.5 mL change in volume at 65 psi.
7. The multi-stage pump of claim 1 , wherein the disposable filter exhibits less than a 0.5 mL change in volume at 65 psi.
8. The multi-stage pump of claim 1 , the head portion is bonded to an uppermost edge of the bowl portion.
9. The multi-stage pump of claim 8 , wherein the bowl portion comprises an inner portion and an outer portion, wherein the inner portion forms at least one sidewall of the filter cavity and extends above the outer portion to form the uppermost edge of the bowl portion.
10. The multi-stage pump of claim 9 , wherein the at least one sidewall is at least 0.375 inches thick.
11. The multi-stage pump of claim 8 , wherein the bowl portion comprises a curved bottom portion.
12. The multi-stage pump of claim 8 , wherein the disposable filter further comprises a reinforcing structure positioned to reduce compliance of the bowl portion.
13. The multi-stage pump of claim 1 , wherein the head portion further comprises a vent port.
14. The multi-stage pump of claim 13 , wherein the head portion comprises a curved top surface at least partially defining the filter cavity.
15. The multi-stage pump of claim 14 , wherein the curved top surface is angled upwards toward the vent port when the filter is installed.
16. The multi-stage pump of claim 1 , wherein the head portion comprises a set of ribs to reduce deflection.
17. The multi-stage pump of claim 1 , wherein the head portion comprises a device identification portion shaped and sized to receive an identification device.
18. The multi-stage pump of claim 17 , further comprising a wireless identification device disposed in the device identification portion.
19. The multi-stage pump of claim 1 , wherein the multi-stage pump is configured to exhibit less than a 2% change in rated volume at 250 psi.
20. The multi-stage pump of claim 1 , wherein the noncompliant filter further comprises a cartridge, the bowl portion comprises a groove, the head portion is coupled to the bowl portion and the cartridge, the cartridge is configured to be inserted into the bowl portion and the cartridge comprises an end cap configured to snap in the groove of the bowl portion.
21. The multi-stage pump of claim 1 , wherein the inlet flow path, outlet flow path, and flow path from the feed chamber to the first dispense block filter port and a flow path from the second dispense block filter port to the dispense chamber are 0.25 inches in diameter or greater.