Pressure compensating bases for polymeric containers
US8444002B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 2010 |
| Grant date | May 21, 2013 |
| Priority date | — |
| Expiry date | Jun 18, 2031 |
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 an opening at one end into the chamber; a base extending from the sidewall and closing 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 plane normal to an axis of the container of less than about 90°, and a flexing panel closing an end of the perimeter wall, the flexing panel moveable along an axis of the container from a first position where a central portion of the panel is below a top portion of the perimeter wall to a second position where the central portion is above the top portion of the perimeter wall to change the volume of the container; and a plurality of circumferentially spaced radial grooves on the panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.