Split body pumps for foam dispensers and refill units
US8662355B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 11, 2011 |
| Grant date | Mar 4, 2014 |
| Priority date | — |
| Expiry date | Nov 22, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/14
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
Foam dispensers, refill units for foam dispensers and liquid pumps for use in foam dispensers are disclosed herein. A refill unit for refilling a foam dispenser system is also disclosed herein. The foam dispenser has an air compressor secured thereto and the air compressor is not disposed of with the refill unit. The refill unit includes a liquid pump and a container for holding a foamable liquid that is connected to the liquid pump. The liquid pump includes a pump housing and a mixing chamber having an inlet check valve and an outlet check valve. The mixing chamber has an extended position with a first volume and a contracted position with a second volume. The pump housing includes an aperture therethrough configured to receive air from an air compressor that does not form part of the refill unit. One or more one-way sealing members are located within the pump housing between the aperture and the mixing chamber for preventing liquid from passing through the aperture in the pump housing for receiving air. A foaming element and outlet nozzle are located downstream of the mixing chamber. The refill unit is configured to be received by a foam dispenser having an air compressor located…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.