Liquid dispenser with screw pump
US6688499B2 · kind B2 · utility
48Cited by
5References
20Claims
0Family size
Inventor
Key dates
| Filing date | Apr 25, 2002 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jul 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F13/005
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A liquid dispenser operates automatically when a hand is present. The dispenser has a screw mounted on a bottle cap housing that turns to pump liquid from an inverted bottle. The screw is turned by a sensor activated motor. A valve opens to allow air to enter the bottle to replace the volume of soap dispensed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.