Remotely controlling modulated flow to a fuel gas burner and valve therefor
US5544856A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 13, 1994 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Jul 13, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2235/16
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A method for remotely controlling flow of gaseous fuel to a burner having an electrically operated electromagnetically actuated modulating valve. The electromagnetic actuator comprises a coil having about one thousand turns of fine wire disposed proximate an annular permanent magnet. Either the magnet or coil may be attached to a moveable valve member which has a resilient poppet biased to close on a valve seat to shut off gas flow. Upon energization of the coil, a magnetomotive force is generated and moves the poppet off the seat to permit flow. Increased current flow in the coil proportionately increases opening of the poppet and movement of a metering member which throttles flow. When the poppet is fully open, flow is reduced to minimum metered level. A single user operated, remotely located potentiometer can be used to effect the proportional control of flow to the burner. In the preferred embodiment the metering member is cylindrical with a varying area grove or recess. In another embodiment, the metering member is a reversely conically tapered member throttling in a conically tapered metering passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.