Foam producing pump with anti-drip feature
US7004356B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2003 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Feb 18, 2024 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B11/1087
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A pump including a pump body having a head assembly slidably received therein; a mixing chamber in communication with an air source and a liquid source; wherein the head assembly is movable relative to the pump body to define a pump stroke, wherein the head assembly urges air from the air supply and liquid from the liquid supply into the mixing chamber to form a foam during the pump stroke; wherein the mixing chamber opens externally of the pump body and wherein during a portion of the stroke less than a complete stroke, the mixing chamber receives fluid and air to form a foam and discharge the foam externally of the pump and wherein during the remainder of the stroke, a blowing charge from the air source is urged through the mixing chamber and externally of the pump to evacuate any residual foam in the pump.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.