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. 06, 1989
Filed:
Apr. 13, 1988
Heinz Bisping, Munich, DE;
Alfred Gahler, Wolfratschausen, DE;
Armin Hoffmann, Germering, DE;
Franz Popp, Puchheim, DE;
Hilti Aktiengesellschaft, , US;
Abstract
An anchoring unit is made up of a screen-type sleeve and an insert sleeve to be placed into the screen-type sleeve. The unit is anchored by a hardenable mass. After the screen-type sleeve is inserted into a borehole in a structure with internal open spaces, the hardenable mass is injected into the screen-type sleeve. When the insert sleeve is placed into the screen-type sleeve, the hardenable mass is forced outwardy through openings in the screen-type sleeve into the open spaces in the structure. The two sleeves each have an inside surface and an outside surface with alternating projecting surfaces and recessed surfaces to facilitate a positive lock with the hardenable mass. Further, the alternating surfaces improve the distribution of the hardenable mass. Preferably, the two sleeves are formed of a plastics material. A fastening element can be inserted into the insert sleeve for securing an object to the structure.