Patent Number: 6,305,583

Title: Valve for viscous fluid applicator

Abstract: A valve for dispensing a viscous fluid, includes a valve body defining a fluid chamber and a stepped armature within the fluid chamber. The armature has a large diameter portion maintained spaced apart from an inner surface of the valve body, defining a first air gap therebetween, and a second, smaller diameter portion which engages an inner surface of the valve body, supporting the armature within the valve body and defining a second lower reluctance air gap. A solenoid coil energized by a peak and hold drive current produces an electromagnetic field for moving the armature relative to the magnetic pole piece and the valve body. The second portion of the armature becomes magnetically saturated during the peak portion of the drive current, causing magnetic flux to be diverted through the first portion of the armature. The second portion of the armature comes out of saturation during the hold portion of the drive current, allowing a portion of the magnetic flux to be passed through the lower reluctance air gap.

Inventors: Ward; James R. (Milwaukee, WI), Stobbs; Thomas J. (Brookfield, WI)

Assignee: TLX Technologies

International Classification: B05C 5/02 (20060101); F16K 31/06 (20060101); B67D 005/06 (); F16K 031/06 ()

Expiration Date: 10/23/2018