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:
Apr. 19, 1983
Filed:
Nov. 13, 1980
Arthur Klaus, Frankfurt am Main, DE;
Horst Tacke, Bad Vilbel, DE;
Signode Corporation, Glenview, IL (US);
Abstract
An air-powered driving tool for returning the working piston to its driving position by way of an auxiliary piston and valve arrangement. After the fastener is driven, the auxiliary piston is operated to engage the working piston to move it to its driving position after which the auxiliary piston is moved to an inoperative position. A valve is operated to direct high-pressure air to the auxiliary piston to move it to a working piston engaging position and then the air is released to allow it to return to its inoperative position. Thus, there is no force opposing the working piston when the driving tool is operated to drive a fastener into a workpiece.