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. 09, 1985
Filed:
Oct. 25, 1982
Artur Klaus, Frankfurt am Main, DE;
Hans Wilhelm, Bad Vilbel, DE;
Signode Corporation, Glenview, IL (US);
Abstract
The present invention relates to a pneumatically operable fastener driving tool which uses a safety device which prevents the operation of the tool until it is in engagement with the workpiece. More particularly, the safety mechanism includes a safety nose that is normally retained in a retracted position prior to the tool being operated. When the tool is to be operated, the safety nose is extended to be engaged by the workpiece. Subsequent engagement of the safety nose by the workpiece permits the trigger mechanism to effect driving movement of the driver. The mechanism includes a first valve which controls the flow of high-pressure air to the driving piston and a second valve which controls the flow of air to the safety mechanism. The trigger mechanism initially operates the second valve to move the safety nose to the operative position and when the safety nose engages the workpiece it effects operation of the first valve to control the operation of the driving piston.