Boiler apparatus and method thereof
US11466898B1 · kind B1 · utility
0Cited by
2References
14Claims
0Family size
Inventor
Key dates
| Filing date | Sep 30, 2019 |
| Grant date | Oct 11, 2022 |
| Priority date | — |
| Expiry date | Jun 23, 2040 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF24D2200/08
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An improved boiler apparatus having multiple resistive heating elements are provided with fixed resistances that can be rewired to allow dual voltage capability and at the same time, reduced watt density. For 120 V operation, the large diameter 9 ohm coil is used alone to provide the lowest possible watt density. For 240 V operation, all three heating coils are wired in series, creating a low watt density but high wattage heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.