Pressure equalizing closure
US10577158B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 28, 2011 |
| Grant date | Mar 3, 2020 |
| Priority date | — |
| Expiry date | Mar 6, 2036 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D79/0087
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The present invention provides a closure for a hot-fill container comprising: a cap member having a top surface, a bottom surface, and a wall portion having an outer surface and an inner surface wherein the inner surface comprises threads to mate with a threaded neck finish of a hot-fill container; a flexible diaphragm member comprising: at least one flexible portion in a first position and a sealing lip portion to seal a liquid in the container thus preventing the liquid from traveling to the threaded neck finish of the container; and a disc member interposed between the cap member and the diaphragm member, wherein the disc member comprises: a hydrophobic filter membrane and at least one vent providing a path for air to travel from an area near the threads to the hydrophobic filter member, wherein the flexible diaphragm member flexes to compensate for a change in pressure within the container by transitioning downwards in response to a decrease in pressure and/or by transitioning upwards in response to an increase in pressure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.