Inhalation device with constricted flow pathway
US10661035B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 12, 2019 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | Apr 12, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/05
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An inhalation device includes a light source that emits light, a light sensor that senses an intensity of the light emitted from the light source and a processor or circuit configured to perform a metering process. The metering process may include when a signal indicating that a puff has been detected by the puff detecting element: extracting a predetermined known flow rate that is stored in the memory in advance, determining an amount of vaporized substance that have been produced, and accumulating the determined amount of vaporized substance that has been produced in the memory as a total amount produced. The metering method may also include when the accumulated total amount produced reaches a predetermined threshold: (i) shut off the heating element or (ii) send a signal to an indicator that the predetermined threshold amount of the vaporized substance has been consumed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.