Gear cutting – milling – or planing – Milling – Thread or helix generating
Reexamination Certificate
2008-05-27
2008-05-27
Ross, Dana (Department: 3722)
Gear cutting, milling, or planing
Milling
Thread or helix generating
C409S066000, C407S054000, C407S024000
Reexamination Certificate
active
11384349
ABSTRACT:
A thread mill that is to be moved along a helical interpolation path while being rotated about an axis of the thread mill in a rotating direction, for forming a thread in a circumferential surface of a workpiece. The thread mill includes a cylindrical main body having (a) at least one spiral flute formed in an outer circumferential surface of the cylindrical main body, and (b) at least one cutting edge each provided by a rear-side one of widthwise opposite edges, as viewed in the rotating direction, of a corresponding one of the at least one spiral flute. Each of the at least one spiral flute extends in a direction opposite to the rotating direction as viewed in a direction away from a proximal end of the cylindrical main body toward a distal end of the cylindrical main body. Also disclosed is a method of forming the thread by using the thread mill.
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Andoh Haruyasu
Nakajima Takayuki
Oliff & Berridg,e PLC
OSG Corporation
Ross Dana
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