Fuel burner valve operator circuit with intermittent ignition
US5133656A · kind A · utility
14Cited by
7References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Feb 19, 2011 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2235/14
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
A burner control system conditions opening of the fuel control valve on proper operation of a hot surface igniter for igniting the fuel. Current flow through and voltage across the hot surface igniter is constantly monitored, and if either is not proper, the valve closes. A pair of diodes provides half wave DC current of different polarity respectively for the hot surface igniter and the valve actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.