Bubble pump for dispensing particulate-ladened fluid
US6394316B1 · kind B1 · utility
27Cited by
18References
8Claims
0Family size
Inventor
Key dates
| Filing date | Jan 24, 2001 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Jan 24, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47K5/1208
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A pump for dispensing particulate-ladened or heavily viscous fluids such as grit-ladened or granulated hand soap or lotion, has a compressible pump cavity with an inlet and a streamlined outlet, with a backflow check valve associated with the inlet and a nozzle assembly connected to the outlet. In the nozzle assembly, a spring loaded outflow ball valve resists outflow until sufficient fluid pressure is applied from the pump cavity. A minimally flow restrictive spring base support structure holds the base of the spring apart from the nozzle tip, creating a fluid flow path around the check ball and spring to the nozzle tip.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.