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:
Jan. 22, 1991
Filed:
Dec. 26, 1989
Applicant:
Inventors:
Assignee:
Hilti Aktiengesellschaft, , LI;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16B / ;
U.S. Cl.
CPC ...
411 30 ; 411 44 ; 411387 ; 411441 ;
Abstract
A fastening element assembly for use in a hard receiving material, such as concrete, masonry and the like, includes a sleeve and a fastening element or bolt. The sleeve forms a blind bore in the receiving material. At its leading end, in the insertion direction, the sleeve has a cutting edge. The sleeve is rotated by rotational force transmitted to engagement faces on the sleeve. After the borehole is drilled by the sleeve, the bolt is driven through the sleeve into the receiving material.