Wave-type pressure compensating bases for polymeric containers
US9481485B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2013 |
| Grant date | Nov 1, 2016 |
| Priority date | — |
| Expiry date | Sep 29, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2501/0036
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A plastic container having a sidewall defining a chamber and having a first end and a second end and an opening at the first end into the chamber. A base of the container extends from the sidewall and closes the second end, the base having an outer perimeter portion defining a support structure, an axially inwardly extending perimeter wall spaced radially inwardly from the support structure forming an angle with a horizontal line of greater than about 80°, a centrally disposed pushup section in the shape of an axially inwardly extending truncated cone, and a toroidal-shaped channel circumscribing and connecting the perimeter wall to the pushup section. The toroidal-shaped channel has a surface that is asymmetrical about a central axis of the container when the container is under static pressure conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.