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US 6,045,000 AGranted
Blow molded drum
OwnerBarry Lee Rauworth, John M. Henneninventors
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OwnerBarry Lee Rauworth, John M. Henneninventors
Estimating the term…
A plastic blow molded drum has unique top and bottom structure providing protection and strength for the drum and attachments. An integrally formed top structure with a sufficiently deep recess provides protection for drum inserts and associated closures. Additionally, the bottom structure includes a sump and structural member formed by the pinched-off parisan during the blow molding process. The drum has a top wall, a cylindrical side wall, and a bottom wall defining an open interior. The top wall has an access port comprising a fitting integrally formed with the drum. The fitting having an upwardly extending neck with inside threads and a top shoulder. A drum insert is engaged with the fitting and provides an additional second threaded fitting and a second shoulder both extending upwardly above the shoulder of the integral fitting. A closure comprising a plug portion and a threaded nut portion engages the second threaded fitting, closes the port, and extends above the second shoulder. The closure has an uppermost portion, which may be a protective cover or venting valve handle. The protective recess may suitably be formed by the chime and/or further downward recessed portions of the top wall such that the first fitting, the second fitting, and the closure, including the uppermost portion of the closure are all below the top edge of the chime.
A combination plastic molded drum, drum insert, and closure, the plastic molded drum comprising a cylindrical wall, a top structure, and a bottom structure:
A combination blow molded plastic drum, drum insert, and closure, the plastic molded drum comprising, a cylindrical wall, a top structure, and a bottom structure, the top structure and the cylindrical wall integrally molded;
A plastic molded drum comprising, a cylindrical wall, a top wall, a bottom wall, and an upwardly extending chime extending from the top wall, all of which are integrally molded, the drum further comprising a first fitting extending upwardly from the top wall, a drum insert threadably attached to the first fitting, having a second fitting extending upwardly from the first fitting and a downhole tube portion extending downwardly from the base portion, the drum further comprising a closure having a plug portion and a nut portion, the plug portion engageable into the second fitting, the nut portion threadably engageable with the first fitting, the closure extending upwardly from the second fitting, the chime and top wall configured such that the closure does not extend above the chime.
A blow molded plastic drum formed from a parison, the drum comprising a cylindrical wall, a top structure, and a bottom structure, the bottom structure and the cylindrical wall integrally molded;
Dependencies are inferred from the claim text.