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. 13, 2014
Filed:
Feb. 27, 2009
Jimmy Carlsson, Fagersta, SE;
Göran Stenberg, Fagersta, SE;
Mattias Rehnström, Fagersta, SE;
Atlas Copco Secoroc AB, Fagersta, SE;
Abstract
Drill bit () for a rock drilling tool (), which drill bit () has a drilling surface () that contacts rock during drilling. A longitudinal cross section () of the drill bit () through the drilling surface () exhibits the following relationships of Ltot(depth)/Ltot(5.0) and H(depth)/H(5.0) at the specied depths, where H(depth)/H(5.0) is measured according to a Vickers test and Ltot(depth)/Ltot(5.0) is measured according to the Palmqvist method, described in this document substantially along the drill bit's longitudinal axial center line (C): (table (I)). If the drill bit () has en length (L) of 10 mm or greater, and a longitudinal cross section () of the drill bit () through the drilling surface () exhibits the following relationships of Ltot(depth)/Ltot(3.5) and H(depth)/H(3.5) at the specified depths, where H(depth)/H(3.5) is measured according to a Vickers test and Ltot(depth)/Ltot(3.5) is measured according to the Palmqvist method described in this document, substantially along the drill bit's longitudinal axial center line (C): (table (II)). If the drill bit () has en length (L) less than 10 mm.