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. 06, 2007
Filed:
Jun. 26, 2003
BO Carlström, Sandviken, SE;
Anders Brungs, Gävle, SE;
Christer Lundberg, Gävle, SE;
Per-olof Liljebrand, Sandviken, SE;
Bo Carlström, Sandviken, SE;
Anders Brungs, Gävle, SE;
Christer Lundberg, Gävle, SE;
Per-Olof Liljebrand, Sandviken, SE;
Sandvik Intellectual Property AB, Sandviken, SE;
Abstract
A male portion for percussive rock drilling includes sections of reduced cross-sectional area. At least one thread for percussive rock drilling is provided at an end of the male portion. The end of the male portion comprises an abutment surface for the transfer of impact waves. The length of the portion is defined as the length of an imaginary cylinder from a plane of the impact surface to a point where the plane ceases to contact a crest of the thread, wherein the length divided by the external diameter of the cylinder lies within a range of 1–2.