Medical device with fail-safe power supply
US11641157B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 2021 |
| Grant date | May 2, 2023 |
| Priority date | — |
| Expiry date | Apr 9, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/23
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A medical device with a power supply for connecting to an AC power grid in the range of >50 VAC to 264 VAC (wide range) features a circuit for only connecting at least one discharge resistor in parallel to at least one smoothing capacitor if no AC input voltage is present at the power supply. The power supply features a rectifier and at least one smoothing capacitor for smoothing a direct voltage to be supplied by the power supply, as well as at least one discharge resistor for discharging the smoothing capacitor. The power supply features a circuit electrically connected to the discharge resistor and the smoothing capacitor, designed to detect a switched-on state of the medical device with an AC input voltage present at its power supply, and to only connect the discharge resistor in parallel to the smoothing capacitor if the circuit does not detect a switched-on state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.