The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2009
Filed:
Apr. 24, 2006
Edward W. Bolyard, Jr., Old Hickory, TN (US);
Daniel D. Bourget, Hendersonville, TN (US);
Edward W. Bolyard, Jr., Old Hickory, TN (US);
Daniel D. Bourget, Hendersonville, TN (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A spool valve and valve seat assembly disposed in the control module of a hot melt adhesive dispensing system is uniquely structured so as to effectively prevent fluid communication or 'cross-talk' between a first dispensing outlet port and a second recirculation port, during those periods when the control module is effectively reciprocally cycling the spool valve between its oppositely disposed extreme conditions for alternatively permitting the hot melt adhesive material to be dispensed from the first outlet port or for re-routing the hot melt adhesive material through the recirculation passage so as to prevent the hot melt adhesive from being improperly dispensed as a result of being undesirably routed to the recirculation passage.