| 摘要 |
A plastic blow molded container ( 10 ) is disclosed as including a freestanding base structure ( 20 ) that is constructed with a plurality of alternating hollow legs ( 22 ) and curved ribs ( 34 ), and a hub ( 41 ) from which the legs and ribs extend radially with a construction that provides good stability against tipping as well as the capability of withstanding internal pressure. The legs ( 22 ) have lower flat feet ( 24 ) with an outer diameter D<SUB>f</SUB>, and the hub ( 41 ) has a periphery connected to the feet and ribs with a height H<SUB>p </SUB>such that the ratio of the diameter D<SUB>f </SUB>over the height H<SUB>p </SUB>is in the range of about 25 to 90 to maintain strength without the hub engaging the supporting surface on which the feet rest. The construction disclosed of the legs ( 22 ), ribs ( 34 ) and hub ( 41, 41 ' and 41'' ) enhances the capability of the base structure in providing good stability as well as the capability of withstanding internal pressure and stress cracking.
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