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:
May. 22, 2012
Filed:
Oct. 28, 2008
Juergen Gahn, Altstaetten, CH;
Andreas Vorhauer, Sulz, AT;
Juergen Gahn, Altstaetten, CH;
Andreas Vorhauer, Sulz, AT;
Hilti Aktiengesellschaft, Schaan, LI;
Abstract
A screw () includes at least one thread () arranged on the screw shaft (); circumferentially surrounding the shaft () at least in some regions, and having a thread pilot () located in the free region () of the shaft () and a plurality of recesses () provided in the thread () and opening radially outwardly, with the recesses () each having a first limiting wall () adjacent to the thread pilot () and a second limiting wall () remote from the thread pilot (), and a plurality of cutting bodies () formed of a material having a hardness greater than a hardness of the thread, located in the recesses () formed in the thread () and having each a longitudinal axis () and an outer surface () surrounding the axis () at a distance therefrom, with the recesses () each having a bearing section () with a plurality of generatrices extending substantially along a course of the thread () for receiving, at least in some regions, the outer surface () of a respective cutting body ().