Foam dispensing systems, pumps and refill units having high air to liquid ratios
US10080467B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2016 |
| Grant date | Sep 25, 2018 |
| Priority date | — |
| Expiry date | Nov 21, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B45/047
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An exemplary foam dispenser system includes a housing, a container, a motor, an air pump, a foam pump, a first mixing chamber, a second mixing chamber, a foam cartridge, and an outlet for dispensing foam. The container holds a foamable liquid. The foam pump has a liquid pump portion that pumps liquid, and an air pump portion that pumps air. The first mixing chamber is located downstream of the liquid pump portion and the air pump portion, and the liquid and the air mix in the first mixing chamber to create a first foam mixture. The second mixing chamber is located downstream of the first mixing chamber and the air pump, and the first mixture and air from the air pump mix in the second mixing chamber to create a second foam mixture. The second foam mixture travels through the foam cartridge and exits the outlet as rich foam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.