Source: http://www.google.com/patents/US8178037?dq=7,181,690
Timestamp: 2017-05-29 13:44:46
Document Index: 443138574

Matched Legal Cases: ['Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 2', 'Application No. 08158682', 'Application No. 08158682', 'Application No. 99941032', 'Application No. 08158682', 'Application No. 98112356']

Patent US8178037 - System for releasing gas into molten metal - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA device for releasing gas into molten metal includes a base having a discharge. The discharge has a first section including a first cross-sectional area and a second section including a second cross-sectional area, wherein the first section is upstream of the second section and the first cross-sectional...http://www.google.com/patents/US8178037?utm_source=gb-gplus-sharePatent US8178037 - System for releasing gas into molten metalAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS8178037 B2Publication typeGrantApplication numberUS 12/120,190Publication dateMay 15, 2012Filing dateMay 13, 2008Priority dateJul 12, 2002Fee statusPaidAlso published asUS8440135, US20050013715, US20080211147, US20080213111Publication number120190, 12120190, US 8178037 B2, US 8178037B2, US-B2-8178037, US8178037 B2, US8178037B2InventorsPaul V. CooperOriginal AssigneeCooper Paul VExport CitationBiBTeX, EndNote, RefManPatent Citations (475), Non-Patent Citations (78), Referenced by (15), Classifications (19), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetSystem for releasing gas into molten metal
US 8178037 B2Abstract
1. A base for a molten metal pump, the base comprising: a pump chamber; a discharge in communication with the pump chamber, the discharge including a first section having a first cross-sectional area and a second section having a second cross-sectional area, the second section being downstream of the first section and the second cross-sectional area being larger than the first cross-sectional area; and a gas-release opening in communication with one or more of the group consisting of the first section and the second section.
2. The base of claim 1 wherein the gas-release opening is positioned along a side wall of the second section.
3. The base of claim 1 wherein the gas-release opening is positioned near a top wall of the second section.
4. The base of claim 1 wherein the gas-release opening is positioned within 3″ of the first section.
5. The base of claim 1 wherein the discharge is fully enclosed.
6. The base of claim 1 wherein the second cross-sectional area is between about 110% and 350% larger than the first cross-sectional area.
7. The base of claim 1 wherein the second cross-sectional area is between about 110% and 120% larger than the first cross-sectional area.
8. The base of claim 1 wherein the second cross-sectional area is between about 120% and 150% larger than the first cross-sectional area.
9. The base of claim 1 wherein the second cross-sectional area is between about 150% and 200% larger than the first cross-sectional area.
10. The base of claim 1 wherein the second cross-sectional area is between about 200% and 300% larger than the first cross-sectional area.
11. The base of claim 1 wherein the second cross-sectional area is between about 250% and 350% larger than the first cross-sectional area.
12. The base of claim 1 that is comprised of graphite.
13. The base of claim 1 wherein there is a gas-release opening in communication with the first section and a gas-release opening in communication with the second section.
14. A molten metal pump including: a base for a molten metal pump, the base comprising: a pump chamber; a discharge in communication with the pump chamber, the discharge including a first section having a first cross-sectional area and a second section having a second cross-sectional area, the second section being downstream of the first section and the second cross-sectional area being larger than the first cross-sectional area; and a gas-release opening in communication with one or more of the group consisting of the first section and the second section.
15. The molten metal pump of claim 14 that further includes a metal-transfer conduit connected to the discharge.
16. The molten metal pump of claim 14 wherein the gas-release opening is positioned less than 12″ from the first section.
17. The molten metal pump of claim 14 wherein the gas-release opening is positioned within 3″ of the first section.
18. The molten metal pump of claim 14 wherein the discharge is fully enclosed.
19. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 110% and 350% larger than the first cross-sectional area.
20. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 110% and 120% larger than the first cross-sectional area.
21. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 120% and 150% larger than the first cross-sectional area.
22. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 150% and 200% larger than the first cross-sectional area.
23. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 200% and 300% larger than the first cross-sectional area.
24. The molten metal pump of claim 14 wherein the second cross-sectional area is between about 250% and 350% larger than the first cross-sectional area.
25. The molten metal pump of claim 14 that further includes a device positioned in a pump chamber in the pump base, the device having a displacement structure and an inlet structure defining one or more inlets wherein the displacement structure and the inlet structure rotate as the device rotates.
26. The molten metal pump of claim 25 wherein the gas-release opening is positioned near a top wall of the second section.
27. The base of claim 1 wherein the third cross-sectional area is larger than the first cross-sectional area.
28. The molten metal pump of claim 14 wherein the third cross-sectional area is larger than the first cross-sectional area.
This application is a continuation of and claims priority to U.S. application Ser. No. 10/773,102 filed Feb. 4, 2004 (now U.S. Pat. No. 7,402,276, issued Jul. 22, 2008), which is a continuation of and claims priority to U.S. application Ser. No. 10/619,405 filed Jul. 14, 2003 (now U.S. Pat. No. 7,507,367, issued Mar. 24, 2009) and U.S. application Ser. No. 10/620,318 filed Jul. 14, 2003 (now U.S. Pat. No. 7,731,891 issued Jun. 8, 2010), both of which claim priority to U.S. Provisional Patent Application Ser. No. 60/395,471, filed Jul. 12, 2002, the disclosures of which are incorporated herein by reference in their entirety for all purposes.
FIG. 3 is a view of the discharge of the pump base of FIG. 2 a. FIG. 4 is an internal view of the discharge of the pump base of FIG. 3.
FIG. 12 b is a partial side view of a gas-transfer conduit positioned in a metal-transfer at a location other than the one shown in FIG. 12 a. FIG. 12 c is a partial side view of a gas-transfer conduit positioned at a location other than the ones shown in FIGS. 12 a and 12 b. FIG. 12 d is a partial side view of a gas-transfer conduit positioned at a location other than the ones shown in FIGS. 12 a-12 c. DETAILED DESCRIPTION OF A PREFERRED EMBODIMENT
Section 32 is preferably about 1″ in length, 3″ in height and 4½ in width for a pump utilizing a 10″ diameter rotor, and has a substantially flat top surface 32A, a substantially flat bottom surface, 32B, a first radiused side surface 32C and a second radiused side surface 32D. Section 32 defines a passage through which molten metal may pass, and any shape or size passage suitable for efficiently conveying molten metal may be used. In fact, section 32 may not even be completely enclosed; for example, it may not have a bottom surface.
A gas-release area 38 is formed in second section 32, preferably within 3″ of wall 36. Gas-release area 38 is any size suitable of receiving an end of a gas-transfer conduit 120 and allowing gas from an opening in conduit 120 to be released into discharge 30. As shown, gas-release area 38 is formed in wall 34D, but, if such a gas-release area is used at all, it could be formed anywhere in second section 34, such as in top surface 34A or bottom surface 34B. It is preferred that area 38 be formed outside of the high-pressure flow of the molten metal stream, as shown in FIGS. 4-7, but it can be positioned anywhere suitable for releasing gas into discharge 30. In addition, the gas-release area may be formed in first section 30 near (preferably within 3″) second section 32. All that is necessary for the proper functioning of the invention is that there be (1) a first section of a metal-transfer conduit having a first cross-sectional area and a second section of the metal-transfer conduit downstream of the first section, wherein the second section has a second cross-sectional area larger than the first section, and (2) a gas-release opening in the first section and/or the second section, whereby the respective sections are configured and the gas-release openings is positioned so that less pressure is required to release gas into the molten metal than would be required in known metal-transfer conduits that have substantially the same cross-sectional area throughout. Thus, in addition to a gas-release opening beaing formed in the first section or the second section, a gas-release opening could be formed in the first section and another gas-release opening could be formed in the second section, and gas could be released simultaneously into each section, or into one section or the other.
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