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. 15, 1988
Filed:
Jul. 14, 1986
Applicant:
Inventor:
Erwin Schiefer, Munich, DE;
Assignee:
Hilti Aktiengesellschaft, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16B / ; E21D / ;
U.S. Cl.
CPC ...
411 55 ; 411418 ; 405259 ;
Abstract
An expansion bolt assembly includes an anchor bolt with a conically shaped expansion head at one end arranged to be drawn into an expansion sleeve. At the opposite end, the anchor bolt forms a plurality of axially extending projections protruding radially outwardly from the anchor bolt shank. The axially extending projections are spaced circumferentially apart around the anchor bolt and the outer surface of the projections are threaded to receive a nut. The anchor bolt can be produced in an extrusion process with great material economy.