Drilling tool
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Apr 21, 2005
app pub date -
Aug 12, 2004
filing date -
Feb 12, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A drilling tool having a drill bit with an annular base body that can be fixed to a hollow cylindrical drill pipe. The base body has tool recesses distributed around the circumference of the side facing away from the drill pipe and which hold interchangeable cutting teeth, the tool head of the teeth projecting in an axial direction above the base body. A shaft, which is mounted in a shaft cavity of the tool recess, is coupled to the tool head. This invention provides an optimized tool in terms of technology and resistance to wear. To achieve this, the shaft is mounted in an insertion channel of the shaft cavity, the insertion cavity terminates in an opening, which accommodates a nut, the shaft has a threaded section that projects into the opening and is screwed into the nut and the cutting tooth is held in a prestressed manner against one or more supporting surfaces of the tool recess.
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