Foam dispenser
US9073066B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 2, 2013 |
| Grant date | Jul 7, 2015 |
| Priority date | — |
| Expiry date | Apr 2, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1028
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A foam assembly connectable to a liquid container includes a main pump body, a resiliently deformable piston dome, an air chamber, a liquid chamber, a mixing zone and a porous member. The main pump body has an exit nozzle with the porous member therein. The air chamber and the liquid chamber are each defined by the piston dome and the main pump body. The liquid chamber has a liquid inlet valve and a liquid outlet valve. The mixing zone is in flow communication with the air chamber and the liquid chamber. The volume of the air chamber and the liquid chamber are each dependent on the position of piston dome and during an activation stroke the piston moves from the at rest position to the depressed position and responsively the volume of the air chamber and the volume of the liquid chamber are reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.