Hot-wire control for an electronic cigarette
US10342261B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 19, 2017 |
| Grant date | Jul 9, 2019 |
| Priority date | — |
| Expiry date | May 19, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/24
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An electronic vaping device includes a battery section and a cartridge coupled to the battery section. The cartridge includes a reservoir and a heating coil. The battery section includes a controller. The controller is configured to: calculate a first value of a heat transfer time constant of the heating coil; calculate a second value of the heat transfer time constant of the heating coil; compute a difference between the first value and the second value; determine that the difference between the first value and the second value exceeds a threshold value; and output an indication that the liquid formulation in the reservoir is becoming depleted in response to determining that the difference between the first value and the second value exceeds the threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.