Pulse width modulated gas flow control valve
US6019347A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 13, 1998 |
| Grant date | Feb 1, 2000 |
| Priority date | — |
| Expiry date | Mar 13, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23N2235/16
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A gas flow control valve for quietly regulating the flow of a gas. The valve includes first and second coaxially oriented elongate tubes of magnetic material and an elongate sleeve of nonmagnetic material coaxially connecting the tubes. An electric coil assembly is disposed around the sleeve. A cover of magnetic material is provided around the coil and is in contact with the tubes. A nozzle opening is disposed within the first tube and has a valve seat encircling the nozzle opening. An elongate armature is axially slidably disposed within the sleeve and the first and second tubes and is moveable between first and second positions. The armature has a first end with an elastomeric seal member which abuts the valve seat when the armature is in the first position thereof to block the flow of gas. The armature further includes a gas flow passageway extending axially to a second end thereof. An elastically yieldable member is provided for continually urging the armature toward the first position thereof. The coil assembly, cover and the tubes are configured to effect a magnetically inspired axial movement of the armature, against the urging of the elastically yieldable member, to the sec…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.