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:
Feb. 20, 1979
Filed:
Feb. 03, 1978
Thomas Herbst, Munich, DE;
Dyckerhoff & Widmann Aktiengesellschaft, Munich, DE;
Abstract
A profiled tensioning rod or combination of rods is provided at the end which is to be inserted into the bore hole of a rock, with a corrosion protective tube formed in three parts, an anchoring part adapted to extend over the greater portion of the anchored end of the rod, a 'free steel part' adapted to extend over the (initially) unconnected part of the anchoring rod which extends into the bore hole and a junction part to which the other two parts are connected. The junction part extends beyond the periphery of the other parts of the tube and is large enough to prevent any substantial flow of cement outwardly from the space between the anchoring part and the bore hole. The free steel part of the tube contains a deaerating conduit so that when the rock formation is stabilized after the various borings, etc., the free steel part of the bore hole may be cemented.