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:
Jul. 24, 2012
Filed:
May. 12, 2009
John F. Schaupp, Sylvania, OH (US);
Martin J. Selmek, Temperance, MI (US);
John F. Schaupp, Sylvania, OH (US);
Martin J. Selmek, Temperance, MI (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A pump adapted for coupling in a fluid circuit between a source of coating material and a dispensing device. The pump includes an operating member which extends through a pump housing to a location adjacent the fluid circuit. The passage of the operating member to a location adjacent the fluid circuit includes a seal system permit operation of the pump while reducing the likelihood of leakage of the coating material from the circuit out of the housing along the operating member. The seal system includes at least first and second seals defining between them a flushable seal chamber facing a pump chamber containing the coating material being pumped.