Squeeze action foam pump
US8579159B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 18, 2008 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | May 30, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1035
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A foam dispenser includes a foam pump communicating with the contents of a container holding a foamable liquid. The foam pump includes a pump body, a passage extending through the pump body from an inlet to an outlet, an inlet valve including an inlet flow regulator, and an outlet valve including an outlet flow regulator. The inlet receives foamable liquid from the container. The inlet valve and outlet valve are positioned in the passage to define (a) an inlet stage, (b) an outlet stage, and (c) a transition stage. A liquid port extends through the pump body and communicates with the transition stage, and an air port extends through the pump body and communicates with the outlet stage. A liquid bellows surrounds the liquid port and an air bellows surrounds the air port. The liquid bellows contains the foamable liquid and is movable between an expanded volume and a contracted volume, and expels at least a portion of the foamable liquid to the passage through the liquid port when moved from its expanded volume to its contracted volume. The air bellows contains air and is movable between an expanded volume and a contracted volume, and expels at least a portion of the air to the passag…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.