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  Steel drainUSPTO Application #: 20080005835Title: Steel drain Abstract: A drain provides significant advantages over the prior art. A drain fabricated without seams can be easily cleaned and does not provide sites for bacterial growth. The cone and outlet sections of the drain are formed using a spinning process to eliminate the need for welds. The cone section includes a vertical interface lip, such that the outside of the cone section is welded to the rim, eliminating a weld on the interior of the cone. The weld between the rim and the cone section can be polished to eliminate imperfections on the top of the drain. The contour of the cone section also facilitates drainage, and hence reduces bacterial growth, by maintaining a downward slope on a smooth surface. For an embodiment with a membrane flange, dual walls are used such that the membrane flange can be welded to the outer wall of the drain, preventing the welding process from damaging the smoothness of the interior drain wall. (end of abstract) Agent: Anderson, Levine & Lintel L.L.P. - Dallas, TX, US Inventors: William Shipley, Shelia Heller, Terry Henry USPTO Applicaton #: 20080005835 - Class: 004695000 (USPTO) Related Patent Categories: Baths, Closets, Sinks, And Spittoons, Support Or Mount For A Supply, Drain, Overflow Or Trap Means The Patent Description & Claims data below is from USPTO Patent Application 20080005835. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATIONS [0001] This application claims the benefit of the filing date of copending provisional application U.S. Ser. No. 60/806,803, filed Jul. 10, 2006, entitled "Steel Drain", which is incorporated by reference herein. STATEMENT OF FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002] Not Applicable BACKGROUND OF THE INVENTION [0003] 1. Technical Field [0004] This invention relates in general to drains and, more particularly, to a steel drain for use in the food industry. [0005] 2. Description of the Related Art [0006] A significant problem in the food industry, especially in the meat, poultry and dairy industries, concerns sanitary drainage systems. In current drainage systems, bacteria will often accumulate on the drains. Wastewater typically includes organic substances, such as food particles and dead flesh. This is especially true in the food industry. A cool, wet environment, along with organic substances, provides perfect breeding grounds for bacteria. Once established, it can spread to other equipment and preparation surfaces. This can result in the food products themselves being contaminated. [0007] Therefore, a need has arisen for a drain which avoids or prevents colonization of bacteria. BRIEF SUMMARY OF THE INVENTION [0008] In the present invention, a drain comprises a seamless interior funnel section formed using a metal spinning process having an interior and exterior surface, a rim and a weld between the rim and the exterior surface of the interior funnel section. [0009] This embodiment of a drain provides significant advantages over the prior art. The seamless funnel section can be easily cleaned and does not provide sites for bacterial growth. The metal spinning process eliminates the need for welds, which cause bacterial growth sites. The weld between the rim and the exterior of the interior funnel section can be polished to eliminate imperfections on the top of the drain. [0010] In a second embodiment of a drain, an exterior funnel section is welded to the rim and surrounds the interior funnel section. A membrane flange is welded to the exterior funnel section. [0011] This embodiment of the invention provides significant advantages over the prior art. By welding the flange to the exterior funnel section, the welding process will not cause imperfections on the interior surface of the funnel section of the drain. BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS [0012] For a more complete understanding of the present invention, and the advantages thereof, reference is now made to the following descriptions taken in conjunction with the accompanying drawings, in which: [0013] FIGS. 1a and 1b illustrate an exploded view of a funnel drain; [0014] FIGS. 2a through 2f illustrate a perspective view of a trench drain; [0015] FIGS. 3a through 3b illustrates anchoring tabs used to anchor the drain to rebar within a cement floor; [0016] FIG. 4 illustrates a long drain formed from connected trench drain segments; [0017] FIG. 5 illustrates a perspective view of a double containment funnel drain with an attached membrane flange; [0018] FIGS. 6a and 6b illustrated a cross-sectional side view and a top view of the funnel drain of claim 5; [0019] FIG. 7 illustrates a close up cross-sectional side view of the connection between the upper rim, inner funnel and outer funnel for the funnel drain of FIG. 5; Continue reading... Full patent description for Steel drain Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Steel drain patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Steel drain or other areas of interest. ### Previous Patent Application: Stackable folding multiunit washstand Next Patent Application: Bed equipped with side rails Industry Class: Baths, closets, sinks, and spittoons ### FreshPatents.com Support Thank you for viewing the Steel drain patent info. IP-related news and info Results in 4.54271 seconds Other interesting Feshpatents.com categories: Tyco , Unilever , Warner-lambert , 3m |
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