Throw-away tipped drill, throw-away tip, and drill main body

Details Throw-away tipped drill, throw-away tip, and drill main body Throw-away tipped drill, throw-away tip, and drill main body

2007-01-30

2007-01-30

Howell, Daniel W. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

C408S227000, C408S713000

Reexamination Certificate

active

10794473

ABSTRACT:
In a throw-away tipped drill, a slit is formed at the bottom surface of a tip attachment seat which faces towards the end of its axial line direction, with this slit extending towards the rear of the axial line direction. Furthermore, when seen from the end of the axial line direction, this slit is arranged as being displaced so as to be closer to a second end portion into which a shaft portion of a clamp bolt is threaded than to a first end portion which is pressed by a head portion of that clamp bolt. As a result, when, using the clamp bolt, the pair of outer side surfaces of the tip are pressed by the pair of internal side surfaces of the tip attachment seat, the pressing forces are mutually equal to one another.

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Patent Abstracts of Japan for JP2002-254230 published on Sep. 10, 2002.
Patent Absracts of Japan for JP2003-71622 published on Mar. 12, 2003.
Patent Abstracts of Japan for JP2003-175413 published on Jun. 24, 2003.

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