Valves and valve actuation – Electrically actuated valve – Solenoid having plural coils
Reexamination Certificate
2011-01-18
2011-01-18
Bastianelli, John (Department: 3753)
Valves and valve actuation
Electrically actuated valve
Solenoid having plural coils
C251S129160, C251S129180, C335S267000
Reexamination Certificate
active
07871058
ABSTRACT:
A hot melt adhesive or other thermoplastic material dispensing valve assembly comprises a pair of oppositely disposed electromagnetic solenoid assemblies which alternatively act upon a pair of armatures which are fixedly mounted upon a valve stem, upon which is fixedly mounted a valve member, so as to rapidly and assuredly control the reciprocal movements of the valve stem, and the valve member attached thereto, between its unseated or OPENED position and its seated or CLOSED position. A coil spring also biases the valve stem and the valve member toward the seated or CLOSED position such that when both of the electromagnetic solenoid assemblies are de-energized, the coil spring maintains the valve member at its seated or CLOSED position upon the valve seat.
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Edwards Richard L.
Robinson James W.
Tiller C. Randolph
Bastianelli John
Illinois Tool Works Inc.
Law Offices of Steven W. Weinrieb
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