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. 24, 1987
Filed:
Jan. 08, 1985
Applicant:
Inventor:
Peter Mauthe, Kleinberghofen, DE;
Assignee:
Hilti Aktiengesellschaft, Furstentum, LI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E21D / ;
U.S. Cl.
CPC ...
405260 ; 405261 ; 405303 ;
Abstract
Before injecting a flowable hardenable mass for anchoring a fastening member in a borehole, a coating solution is sprayed into the borehole for securing any drilling dust remaining on the borehole surface. A device for introducing the hardenable mass into the borehole includes a feed duct for injecting the mass. A container holding a coating solution is provided in the device. Another duct laterally surrounds the feed duct and forms an annular passage and a tube extends from the container to the annular passage for spraying the solution onto the borehole surface.