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Universal container for chemical transportation

Imported: 24 Feb '17 | Published: 06 Jan '04

K. Lee Mount, Paul Melia, David S. Clelland

USPTO - Utility Patents

Abstract

A plastic bottle is disclosed, which comprises a cylindrical sidewall having a predetermined thickness, an upper mouth-forming portion, a neck extending from this mouth-forming portion, a dome-shaped portion between the neck and one axial end of the cylindrical sidewall, a lower bottom-forming base extending from the other axial end of the cylindrical wall, all about a central axis. The bottle also has at least three substantially vertical exterior ribs that are substantially uniformly angularly spaced from each other about the axis on the neck, and these ribs have maximum cross-sectional radial dimensions along the axis generally greater than said predetermined thickness. The ribs reinforced the neck and distribute forces resulting from impact of a localized force to the mouth-forming portion towards the dome-shaped portion and cylindrical sidewall.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

With the above and additional objects and advantages in view, as will hereinafter appear, this invention comprises the devices, combinations and arrangements of parts hereinafter described by way of example and illustrated in the accompanying drawings of preferred embodiments in which:

FIGS. 1-4 are side elevational views of a plastic bottle in accordance with the present invention, showing various sides thereof;

FIG. 5 is a top plan view of the bottle shown in FIGS. 1-4;

FIG. 6 is a fragmented enlarged side elevational view of the upper mouth-forming portion and its transition point to the neck of the bottle;

FIG. 7 is a bottom plan view of the bottle shown in FIGS. 1-4;

FIG. 8 is a cross-sectional view of the neck of the bottom taken through line

8

8 in FIG. 1;

FIG. 9 is a cross-sectional view of the handle shown in FIG. 1, taken along line

9

9;

FIG. 10 is a diagrammatic cross-sectional view taken along a plane extending through the axis and opposing leg portions of the bottle, showing the general configuration of the lower surface of the base under ambient pressure conditions, where the pressure is the same both inside and outside the bottle;

FIGS. 11

a-

11

c are generally similar to FIG. 10, but showing the increasing downward deflections of the underside or lower wall of the base under increasing differential internal pressures of 25, 30 and 35 lbs;

FIGS. 12

a-

12

c are generally similar to FIGS. 11

a-

11

c, in which the increasingly expanded conditions of the bottle are shown in dash outline while the bottle under ambient condition continues to be shown in solid outline in order to show a reference and the changes from the normal bottle condition as pressure is increased; and

FIG. 13 is a flow chart of the extrusion blow-molding process used to make the bottle of the invention.

Claims

1. A plastic bottle comprising:

2. A plastic bottle as defined in claim 1, wherein two ribs are provided and adjacent ribs are angularly spaced about said axis approximately 180°.

3. A plastic bottle as defined in claim 1, wherein four ribs are provided and adjacent ribs are angularly spaced about said axis approximately 90°.

4. A plastic bottle as defined in claim 1, further comprising a molded handle extending from said neck to said dome-shaped portion.

5. A plastic bottle as defined in claim 1, wherein the bottle is made from a high density polyethylene.

6. A plastic bottle as defined in claim 1, wherein said base includes a plurality of spaced convex, hollow foot-forming portions extending radially and downwardly from a central bottom portion to form supporting feet adjacent to the periphery of the container.

7. A plastic bottle as defined in claim 1, wherein said base includes a plurality of circumferentially spaced, downwardly convex segments and a plurality of intervening and circumferentially spaced, convex, hollow foot-forming portions expanding radially outwardly from the longitudinal axis of the container to expansive outer surfaces merging with the sidewall and downwardly from the circumferentially spaced, downwardly convex segments, each said foot-forming portion providing a bottom clearance-forming portion.

8. A plastic bottle as defined in claim 7, wherein four foot-forming portions are provided.

9. A plastic bottle as defined in claim 7, wherein said foot-forming portions are substantially uniformly spaced from each other about said axis.

10. A plastic bottle as defined in claim 7, wherein said convex segments are arranged to expand radially outwardly and axially in a direction away from said cylindrical sidewall with increased internal pressures.

11. A plastic bottle as defined in claim 10, wherein said segments are configured and dimensioned to withstand internal pressures of 30 kpa (4.5 Psi) in leakproof tests.

12. A plastic bottle as defined in claim 10, wherein said segments are configured and dimensioned to withstand internal pressures of 240 kpa (35 Psi) in hydrostatic tests.

13. A plastic bottle as defined in claim 1, wherein the dimensions of said ribs are selected to withstand a 75-inch drop test.

14. A plastic bottle comprising: