Patent ID: 11905095
Assignee: CO2PAC LIMITED
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A hot-fillable plastic bottle, the bottle comprising:
a finished portion defining an opening;
a body portion disposed below the finished portion and defining a central longitudinal axis, the body portion comprising a body sidewall defining an interior, the body sidewall having at least one circumferential rib extending about its circumference and configured to resist radial distortion; and
a base portion disposed below the body portion, the base portion comprising:
a base sidewall,
a bottom support surface extending radially inward from the base sidewall toward the central longitudinal axis and defining a reference plane,
an inner support wall extending upwardly from the bottom support surface, and

a diaphragm extending radially inward toward the central longitudinal axis from the inner support wall, the diaphragm comprising an inner wall and a central conical structure, the inner wall extending from the inner support wall to the central conical structure and consisting essentially of a single continuous arcuate shape in a side cross section, wherein the diaphragm is in an initial as-formed position with the conical structure above the reference plane, the diaphragm configured to move from the initial as-formed position toward a second position when an internal pressure relative an external pressure external of the bottle exceeds a threshold value, wherein the diaphragm is configured to move downwardly in response to an increase in the internal pressure and wherein the second position is below the as-formed position, and further wherein the diaphragm is configured to move upwardly and axially inward in response to a decrease in internal pressure corresponding to an internal vacuum being created within the bottle due to cooling of a hot-fill liquid provided in the bottle.