Gear cutting – milling – or planing – Milling – With cutter holder
Reexamination Certificate
2006-12-05
2006-12-05
Howell, Daniel W. (Department: 3722)
Gear cutting, milling, or planing
Milling
With cutter holder
C408S23900A
Reexamination Certificate
active
07144210
ABSTRACT:
A rotary tool holder includes a shank having a flange, a tapered outer surface, and front and rear contact portions. The tapered outer surface corresponds to the tapered bore of a spindle, and flexible circular cantilevers are provided at one or both contact portions such that a free end of the cantilevers expands radially due to centrifugal force to maintain contact with the tapered bore. The shank can be formed from an inner member and a sleeve disposed thereover, in which portions of the sleeve form the circular cantilevers. The circular cantilevers can also be formed by a cavity created in the shank. Alternatively, instead of circular cantilevers, the shank of the tool holder can have a taper which is optimized for a certain speed, wherein the taper of the shank has a first taper at rest and a different, optimized taper at a desired speed.
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Erickson Robert A.
Massa Ted R.
Siddle David R.
Howell Daniel W.
Kennametal Inc.
Meenan Larry R.
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