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:
Aug. 29, 2000
Filed:
Jun. 03, 1998
George M Velan, Mount Prospect, IL (US);
George G Dewey, Palatine, IL (US);
Illinois Tool Works Inc., Glenview, IL (US);
Abstract
An improved combustion powered tool for driving fasteners into a workpiece includes a main housing enclosing a cylinder body and an adjacent combustion chamber. The tool includes a workpiece-contacting nosepiece attached to the housing at the end opposite the combustion chamber and holds fasteners to be driven into the workpiece. A reciprocally disposed piston is mounted within the cylinder body, and is attached to an elongate driver blade, the driver blade being used to impact the fasteners and drive them into the workpiece. At the upper end of the cylinder body is disposed a compressible piston retaining device. The retaining device is of sufficient strength to accommodate the weight of the piston and to retard the upward velocity of a returning piston, but is overcome when the tool is fired.