초록 ▼

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 ag

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 hollow leg (22) has lower flat feet (24) with curved outer extremities that extend circumferentially for 45 to 65 percent of the extent about a central axis A of the container to provide good stability against tipping. Best results are achieved when the lower flat feet have curved outer extremities that extend circumferentially for 50 to 60 percent, and most preferably about 55 percent of the extent about the central axis A to provide the good stability against tipping.

대표청구항 ▼

[ What is claimed is:] [1.] In a plastic blow molded container having a central axis A and including a cylindrical body portion that extends vertically about the central axis A with a diameter D, an upper end closure unitary with the upper extremity of the cylindrical body portion and including a di

[ What is claimed is:] [1.] In a plastic blow molded container having a central axis A and including a cylindrical body portion that extends vertically about the central axis A with a diameter D, an upper end closure unitary with the upper extremity of the cylindrical body portion and including a dispensing spout, and a freestanding base structure unitary with the cylindrical body portion to close the lower extremity thereof, said freestanding base structure comprising:a plurality of downwardly projecting hollow legs spaced circumferentially from each other with respect to the body portion; each leg having a lower flat foot coplanar with the feet of the other legs to cooperate therewith in supporting the container in an upright position; the lower flat feet having outer curved extremities that extend circumferentially for 45 to 65 percent of the extent about the central axis to provide good stability against tipping; each leg also having an outer wall that extends from the outer extremity of the flat foot thereof to the cylindrical body portion; the flat foot and the outer wall of each leg having a curved junction; each leg also having an inner connecting portion that extends upwardly and inwardly from the inner extremity of the flat foot thereof; and each leg also having a pair of side walls that cooperate with the flat foot, the outer wall and the inner connecting portion to close the leg;a plurality of curved ribs spaced circumferentially from each other between the downwardly projecting legs and connecting the adjacent side walls of the legs; each rib having an outer upper end that extends upwardly for connection to the cylindrical body portion of the container; each rib also having an inner lower end located between the inner connecting portions of the legs and extending downwardly and inwardly toward the central axis A of the container; and each rib also having a curved intermediate portion that extends between the outer upper and inner lower ends thereof with an outwardly convex shape; anda generally round hub that is located along the central axis A with the legs and curved ribs extending radially therefrom; said hub having a diameter D.sub.h in the range of about 0.15 to 0.25 of the diameter D of the cylindrical body portion; and the hub having connections to the upwardly extending inner connecting portions of the legs and the hub also having connections to the downwardly extending inner lower ends of the curved ribs.