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Toshio Imaoka Patents |
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Inventor: Imaoka; Toshio
Address: Yokohama, JP
No. of patents: 2
Patents:
| Patent Number |
Title Of Patent |
Date Issued |
| 7350595 |
Drilling device and drilling method |
April 1, 2008 |
| A drilling device is composed so as to drill a drilled object composed of a brittle material with the end of a rotating core bit by using a core bit in which a bit, formed by dispersing and arranging a cemented carbide or super abrasive in a binder phase, is provided on the end of a |
| 6394717 |
High speed-perforating apparatus |
May 28, 2002 |
| Disclosed is a high speed-perforating apparatus 1 comprising a rotor 17 into and through which a cylindrical rotary shaft 11 is integrally inserted, a stator 18 disposed around the outer periphery of the rotor 17 and a core bit 13 which is directly connected to the head end portion of |
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