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:
Jun. 30, 1981
Filed:
Jul. 02, 1979
Armin Herb, Peissenberg, DE;
Gusztav Lang, Munich, DE;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A fastening element assembly for insertion into a prepared borehole is made up of a tie bolt and an expanding wedge. The tie bolt has a C-shaped flange formed on its trailing end which projects radially and circumferentially from the tie bolt. The projecting ends of the flange form a guide for the expanding wedge as the wedge is driven into a borehole in converting the assembly from its unspread condition into locked engagement within the borehole. Preferably, the circumferential surface of the tie bolt and the expanding wedge each form part of a circle. In the unspread condition, the circumferential surfaces of the parts of the tie bolt and expanding wedge disposed in surface contact with one another, form a circle.