Patents by Inventor C. Randolph Tiller

C. Randolph Tiller has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual inline solenoid-actuated hot melt adhesive dispensing valve assembly
    Patent number: 7871058
    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.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: January 18, 2011
    Assignee: Illinois Tool Works Inc.
    Inventors: James W. Robinson, C. Randolph Tiller, Richard L. Edwards
  • Dual inline solenoid-actuated hot melt adhesive dispensing valve assembly
    Publication number: 20090026230
    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.
    Type: Application
    Filed: July 25, 2007
    Publication date: January 29, 2009
    Inventors: James W. Robinson, C. Randolph Tiller, Richard L. Edwards