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| Number | Title | Issue Date |
| 7303363 | Pneumatic drill A drill has a tubular outer housing and a tubular inner housing. The inner housing is movable between extended and retracted positions. A pneumatic motor with a chuck mounts to the inner housing. Air pressure is delivered to annular pistons to cause the inner housin... | 12/04/2007 |
| 7121773 | Electric drill apparatus An electric drill apparatus having a low profile is provided which comprises an annular cutter, a motor for rotating the annular cutter, a rotary shaft assembly for rotating the annular cutter attached to its leading end about a rotating, a rotation reduction mechan... | 10/17/2006 |
| 7104866 | Machining device According to a machining device for machining a conductive workpiece (W) by a conductive (T), when the tool (T) contacts the workpiece (W) in machining, there is formed a closed-circuit (C) connecting the tool (T), the workpiece (W), a brush (315), a conducto... | 09/12/2006 |
| 5895177 | Machine tool with fault detection A machine tool includes a spindle having a cutting tool for cutting a workpiece. For fault detection, a control unit of the machine tool detects a value representing a torque applied on the spindle while the spindle is stopped in a state the cutting tool ... | 04/20/1999 |
| 5730037 | Multi-spindle machine control systems The machine control system for a multi-spindle machine (10) includes a controller (42). The controller is operative to avoid machine down time by shutting down operation of the main drive motor (12) of the multi-spindle machine responsive to malfunctions ... | 03/24/1998 |
| 4261673 | Magnetic base drill A magnet base drill unit having a finger thereon frictionally engaging the surface of the workpiece to which the base of the drill unit is magnetically adherred. The finger is movable in response to lifting or sliding of the energized magnet base from the... | 04/14/1981 |
| 4179101 | Two torch head for oxygen cutting machines A torch head is provided for an oxygen-cutting torch machine comprising, in combination, a torch head; a first torch mounted on the torch head for cutting perpendicular cuts; and a second torch mounted on the torch head for cutting at an angle to the perp... | 12/18/1979 |
