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DEN HARTOG INDUSTRIES
| DEN HARTOG INDUSTRIES Patent applications | ||
| Patent application number | Title | Published |
|---|---|---|
| 20090266821 | MOLDED TANK WITH CAST-IN FITTING SEAT - A plastic tank is rotationally molded with a cast-in steps seat for a leak-proof drainage fitting. The seat is formed during the molding process using a mandrel mounted on the mold wall. The seat provides substantially parallel surfaces to the outer wall surface of the tank so as to assure proper sealing of the fitting installed in the drain opening of the tank. | 10-29-2009 |