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. 01, 2003
Filed:
Aug. 23, 2001
Chris H. Porth, Gurnee, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
A spark unit for an internal combustion fastener-driving tool comprises a spark plug body mounted within a boss portion of the tool cylinder head, and a spark unit cathode electrode is mounted within the spark plug body in such a manner that the tip portion of the spark unit cathode electrode projects below or away from the bottom or under-surface portion of the cylinder head mounting boss. In this manner, the tip portion of the spark unit cathode electrode is not disposed within a recess or pocket region so as not to tend to accumulate dirt or oil deposits which can tend to foul or otherwise adversely affect the sparking and ignition charactreristics of the spark plug assembly and the operation of the fastener-driving tool.