Cutting by use of rotating axially moving tool – Means to drive tool
Reexamination Certificate
2011-08-02
2011-08-02
Gates, Eric A (Department: 3726)
Cutting by use of rotating axially moving tool
Means to drive tool
C408S141000, C470S903000
Reexamination Certificate
active
07988388
ABSTRACT:
A spindle attachment device attached, for use, to a distal end of a spindle of a machine tool is provided. The spindle attachment device (11) includes a hollow casing (13) having an internal space; an input shaft (17) rotatably supported inside the casing; an output shaft (19) rotatably supported inside the casing; a coupling member (15) connected to the input shaft in order to join the input shaft to the spindle of the machine tool; a gear train (21) disposed between the input shaft and the output shaft in order to increase a rotation speed of the input shaft for a transmission to the output shaft; and a tap holder (25, 27) for mounting a tapping tool on the output shaft. The spindle attachment device increases the rotation speed of the spindle and transfers it to the tapping tool, and thus makes it possible to perform a tapping process on a workpiece at high speed, while maintaining the rotation speed of the spindle at a low level.
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Japanese Notice of Reasons for Rejection mailed Mar. 3, 2010, directed to counterpart Japanese Application No. 2004-277001; 4 pages.
Seto Takashi
Suzuki Masaharu
Gates Eric A
Makino J Co., Ltd.
Morrison & Foerster / LLP
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