Apparatus and methods for operating a gas valve
US7497386B2 · kind B2 · utility
13Cited by
9References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 8, 2004 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Oct 5, 2025 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2235/14
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
An apparatus for operating a gas valve in a gas-fired heating system includes a solenoid having a pick coil and a hold coil connected to the pick coil and to a thermo-generator. A power supply powers the pick coil to open the gas valve. The thermo-generator powers the hold coil to hold the gas valve open. The apparatus is small and inexpensive compared to systems that use DC-DC converters and/or stepper motors to operate a millivolt valve. A millivolt valve can be operated via power from a heater thermostat, without AC power having to be wired to the heater.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.