Patent ID: 6019347
Filing Date: 2000-02-01
Classification: F16K,F23N

Abstract:
A gas flow control valve for quietly regulating the flow of a gas, comprising:first and second coaxially oriented elongate tubes of magnetic material, each having a hollow interior for conducting the gas;an elongate sleeve of nonmagnetic material coaxially connecting said tubes;an electric coil assembly disposed around said sleeve;a cylindrical cover of magnetic material around the coil and contacting said magnetic material tubes;a nozzle opening disposed within said first tube and having a valve seat encircling said nozzle opening;an elongate armature axially slidably disposed within said sleeve and said first and second tubes and between first and second positions, said armature having a first closed end, said first closed end abutting said valve seat when said armature is in said first position thereof to block the flow of gas, said armature further including means defining a gas flow passageway extending axially to a second end thereof;elastically yieldable means for continually urging said armature toward said first position thereof; andsaid coil assembly and said second tube being configured to effect a magnetically inspired axial movement of said armature, against the urging of said elastically yieldable means, to said second position and be magnetically stopped thereat in response to an electrical energizing of said coil assembly to draw said first closed end away from said valve seat to a selected spacing to allow a sufficient pressure drop to occur across said spacing and a flow of gas through said nozzle opening and axially of said gas flow passageway, said second tube being free of armature movement impeding mechanical stops intermediate said first and second positions of said armature.