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. 08, 1991
Filed:
Oct. 16, 1989
Fritz Mark, Mader, AT;
Hilti Aktiengesellschaft, Furstentum, DE;
Abstract
An expansion anchor assembly to be secured in a borehole is made up of an expansion sleeve and an anchor rod. The expansion sleeve has a plurality of expansion sections arranged to be deflected radially outwardly by drawing an expansion cone on the front end of the anchor rod into the sleeve. Each expansion section has a circumferentially extending weakened section forming a bending location. The weakened section is located between a radially inner and a radially outer recess in the expansion section. Each of the recesses has a rectilinear base extending tangentially relative to the expansion sleeve axis with the bases located in a plane disposed normal relative to the expansion sleeve axis.