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:
Mar. 14, 1989
Filed:
Dec. 21, 1987
Elmar Thurner, Feldkirch, AT;
Reinhard Buhri, Frastanz, AT;
Hilti Aktiengesellschaft, , US;
Abstract
An explosive powder charge operated fastening element assembly setting device is used to drive a fastening element into a hard receiving material such as concrete, steel and the like. The device includes a striker piston transmitting driving force to the fastening element assembly. The forward end of the striker piston has a marking projection. If excessive driving energy is transmitted from the striker piston to the fastening element assembly, the marking projection forms an imprint in a guidance disk of the assembly. The extent of the imprint provides a gauge of the excessive driving force which results in unsatisfactory insertion of the fastening element. If an annularly-shaped marking projection is used, the imprint formed by it can be viewed from all sides of the fastening element.