Dual-container foam dispenser
US5725129A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 6, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Jun 6, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B7/0037
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An inner container is disposed within an outer container containing an amount of foamable liquid sufficient to provide a substantial foam production capacity. The dual-container foam dispenser is provided with a porous diffusing element having material surface characteristics optimally suited for diffusing pressurized air into stationary foamable liquid located within the inner container, thereby producing high-quality foam. The inner container is provided with an upper valve and a lower valve, each biased open by a return-action biasing force. The valves open to permit flow in either direction between the containers, depending upon system pressure changes during different stages in the foam production cycle, to prevent leakage of foam out of the device and to permit refilling the inner container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.