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:
Oct. 24, 2006
Filed:
Nov. 18, 2003
Teijo Hulkkonen, FI-33580 Tampere, FI;
Hannu Paasonen, FI-37100 Nokia, FI;
Teijo Hulkkonen, FI-33580 Tampere, FI;
Hannu Paasonen, FI-37100 Nokia, FI;
Other;
Abstract
A bit assembly for a hammering and rotating drill, in which a main drill body () is arranged to drill essentially a middle portion of the hole and in the main drill body () there is mounted one or more outer bits (),() arranged to drill an outer circle of the hole. The outer drilling bits (),() are arranged to drill an outer drilling surface which is located behind a middle drilling surface of the main drill body in the drilling direction. The outer bits (),() are further mounted in the drill body () in formed counter cavities (), the axial directions (S) of which are either the same direction as the drilling direction or which deviate outwards from the drilling direction. The outer bits can be moved at least a part of the way out of the counter cavities, in order to be moved in a direction which deviates from the axial direction (S) of the counter cavity.