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:
Dec. 18, 1990
Filed:
Apr. 12, 1990
Applicant:
Inventor:
Reinhard Lins, Sevelen, CH;
Assignee:
Hilti Aktiengesellschaft, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23B / ;
U.S. Cl.
CPC ...
408187 ; 175292 ; 408 81 ; 408127 ; 408199 ;
Abstract
A cutting tool for forming undercuts in boreholes includes a cutting member pivotally and rotatably supported in a tubular drive shaft. The combination of the drive shaft and cutting tool provide a ball joint so that the cutting tool is pivotally supported relative to the drive shaft axis. The drive shaft has an guidance bore for the cutting tool. Guidance stop faces in the guidance bore transmit rotational movement to a head forming a cutting member on the cutting tool. The head forms the undercut. The head rolls over the surface to be undercut.