Title:
DRILL BIT WITH AN EXCHANGEABLE CUTTING PORTION
Document Type and Number:
WIPO Patent Application WO/2014/096366
Kind Code:
A8
Abstract:
Drill bit (10), which is rotatable in a direction of rotation (21) about an axis of rotation (22), having: a cutting portion (11) with an annular portion (13), which is connected at a first end to one or more cutting elements (14) and has at a second end an outer insertion element (15) and a stop shoulder (59), and a drill shaft portion (12) with a cylindrical drill shaft (16), which has at an end towards the cutting portion (11) an inner insertion element (17) with an end face (33). In a direction of insertion parallel to the axis of rotation (22), the insertion elements (15, 17) form a plug-in connection and can be additionally connected by way of at least one pin element (25), which is movable in at least one slit-shaped clearance (26). The at least one pin element (25) is fastened to an outer side (27) of the inner insertion element (17) and the outer insertion element (15) has the at least one slit-shaped clearance (26).
Inventors:
HOOP MATTHAEUS (LI)
WEBER CHRISTOPH (CH)
BRITT THOMAS (CH)
AMMAN CHRISTOPH (LI)
WEBER CHRISTOPH (CH)
BRITT THOMAS (CH)
AMMAN CHRISTOPH (LI)
Application Number:
PCT/EP2013/077697
Publication Date:
June 25, 2015
Filing Date:
December 20, 2013
Export Citation:
Assignee:
HILTI AG (LI)
International Classes:
B23B31/113; B23B51/04; E21B17/046
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