초록 ▼

A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantially reduces the likelihood of failur

A mechanical pump having a unitary construction such that the fluid being pumped is prevented from leaking without requiring the use of discrete seal elements. The absence of discrete seal elements and integral coupling of various components of the pump substantially reduces the likelihood of failure of potential leak points. This allows the pump to operate continuously for a longer period and with greater reliability than previously utilized pumps. The pump can be utilized in a greater number of applications without requiring special design consideration for the fluid being pumped. The absence of discrete seal elements also reduces the cost and complexity of manufacturing the pump.

대표청구항 ▼

What is claimed is: 1. A pump for pumping fluid, the pump being constructed of a ultra-high purity material to avoid contamination of the fluid being pumped, the pump comprising: a displacement mechanism configured to contact a fluid; a pump body coupled to the displacement mechanism to permit the

What is claimed is: 1. A pump for pumping fluid, the pump being constructed of a ultra-high purity material to avoid contamination of the fluid being pumped, the pump comprising: a displacement mechanism configured to contact a fluid; a pump body coupled to the displacement mechanism to permit the fluid to be displaced by the displacement mechanism, the pump body having a unitary construction such that the fluid is prevented from leaking from the pump body; a first head welded to the pump body to define a first pumping chamber, the displacement mechanism being disposed within the first pumping chamber; and a second head welded to the pump body to define a second pumping chamber. 2. The pump of claim 1, wherein the displacement mechanism comprises a diaphragm. 3. The pump of claim 1, further comprising a plurality of check plugs welded to the pump body. 4. The pump of claim 1, wherein the first and second pumping chambers each comprise a pressure chamber. 5. The pump of claim 3, wherein the displacement mechanism comprises a first and second diaphragm. 6. The pump of claim 5, wherein the first diaphragm is disposed within the first pumping chamber and the second diaphragm is disposed within the second pumping chamber. 7. The pump of claim 1, further comprising an inlet port and an outlet port wherein the inlet port functions as an intake, while the outlet port functions as an outlet for a fluid being displaced by the pump. 8. The pump of claim 7, further comprising a plurality of check valves. 9. A pump for pumping fluid, the pump being constructed of a ultra-high purity material to avoid contamination of the fluid being pumped, the pump comprising: a first and second diaphragm configured to convey pumping force needed to displace the fluid being pumped, each of the first and second diaphragm having a flange and a continuous center portion; and a pump body coupled to the first and second diaphragm, the pump having a unitary construction such that the fluid is prevented from leaking; a first head welded to the pump body and forming a first pumping chamber, wherein the first diaphragm separates the first pumping chamber into a first displacement chamber and a first pumping chamber; and a second head welded to the pump body and forming a second pumping chamber, wherein the second diaphragm separates the second pumping chamber into a second displacement chamber and a second pumping chamber. 10. The pump of claim 9, wherein the flange of the first diaphragm is configured to fit within a first groove formed in at least one of the pump body and the first head and wherein and second diaphragm is configured to fit within a second groove formed into at least one of the pump body and the second head. 11. The pump of claim 10, wherein the first and second diaphragm are welded to the pump body to achieve the unitary construction of the pump. 12. The pump of claim 9, wherein the flange of the first diaphragm is sandwiched between the pump body and the first head and the flange of the second diaphragm is sandwiched between the pump body and the second head. 13. The pump of claim 12, further comprising a plurality of check valves. 14. The pump of claim 13, wherein a first and second check valve are associated with the first pumping chamber and a third and fourth check valve are associated with the second pumping chamber. 15. The pump of claim 13, wherein each of the plurality of check valves comprise a ball and a check plug, wherein each check plug is welded to the pump body to form the check valve. 16. A pump for pumping fluid, the pump having a unitary construction such that the fluid is prevented from leaking, the pump comprising: a pump body; a first and second head integrally coupled to the pump body, the first and second head having a molded construction, the first head welded to a first portion of the pump body and forming a first pumping chamber, the second head welded to a second portion of the pump body and forming a second pumping chamber; a first and second diaphragm integrally coupled to the pump body, the first diaphragm disposed in the first pumping chamber and the second diaphragm disposed in the second pumping chamber, the first and second diaphragm configured to convey the pumping force needed to displace the fluid being pumped; and one or more check valves configured to permit the passage of fluid in a single direction, the check valves comprising: a check plug integrally coupled to the pump body; a ball configured to selectively permit the passage of fluid; and a seat positioned adjacent the ball. 17. The pump of claim 16, wherein the first and second head are threadably coupled to the pump body. 18. The pump of claim 16, wherein the check plug of the one or more check valves are welded to the pump body. 19. The pump of claim 16, wherein the check plug of the one or more check valves are threadably coupled to the pump body. 20. The pump of claim 16, wherein each check plug of the one or more check valves is welded to the pump body. 21. The pump of claim 16, wherein the pump body is comprised of a single molded member. 22. The pump of claim 16, wherein the first and second diaphragm each comprise a continuous center portion bounded by a flange, a first flange of the first diaphragm configured to fit in a groove formed between the pump body and the first head and a second flange of the second diaphragm configured to fit in a groove formed between the pump body and the second head. 23. The pump of claim 22, wherein each of the first and second flange is positioned on the outside diameter of the first and second diaphragm such that the first diaphragm is secured to the pump body by the first head and the second diaphragm is secured to the pump body by the second head. 24. The pump of claim 23, wherein the flanges of the first and second diaphragms are configured to be integrally coupled to the first and second heads and the pump body so as to form a diaphragm coupling. 25. The pump of claim 16, wherein the first and second diaphragm are sandwiched between the pump body and the first and second heads. 26. A pump for pumping fluid, the pump being constructed of a ultra-high purity material to avoid contamination of the fluid being pumped, the pump comprising: a driving mechanism providing the pumping force to pump the fluid; and a pump coupled to the driving mechanism such that the pumping force can be conveyed from the driving mechanism to displace the fluid, the pump comprising a disposable module that can be quickly removed and replaced from the driving mechanism when one or more components of the pump fail, the pump further comprising: a first head welded to a pump body; a second head welded to the pump body; a first diaphragm sandwiched between the first head and the pump body; and a second diaphragm sandwiched between the second head and the pump body. 27. The pump of claim 26, wherein the pump further comprises a plurality of check plugs welded to the pump, wherein the welded check plugs and the welded at least one head prevent fluid from leaking without the use of discrete seal elements. 28. The pump of claim 27, wherein the unitary construction of the pump obviates the need to service the pump. 29. The pump of claim 27, wherein the unitary construction of the pump obviates the need to replace seal elements. 30. The pump of claim 26, wherein the driving mechanism comprises an oscillator. 31. The pump of claim 26, wherein the driving mechanism comprises a pilot valve integrally coupled to the pump.