Dispenser for discharging liquids, and operating method therefor
US10661291B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 1, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Mar 1, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/028
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Dispenser with a reservoir for storing liquid, and a discharge opening through which the liquid can be dispensed. The dispenser includes a metering device for discharging a defined liquid quantity upon actuation of the dispenser. The metering device at the entry side is connected to the reservoir and at the exit side is connected to the discharge opening. The metering device includes a pre-metering chamber which via an infeed duct is connected to the reservoir, and a main metering chamber which via an intermediate duct is connected to the pre-metering chamber, and via a discharge duct is connected to the discharge opening. The pre-metering chamber and the main metering chamber each have one repositionable wall, the respective chamber volume being variable by repositioning the wall. The walls are operatively coupled such that a volumetric enlargement of the pre-metering chamber causes a volumetric reduction of the main metering chamber.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.