Power drill and automatic control system therefore
US4688970A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 9, 1985 |
| Grant date | Aug 25, 1987 |
| Priority date | — |
| Expiry date | Aug 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/6793
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A power drill and automatic control system includes a drill spindle for mounting a rotary cutter, a spindle rotation drive including a drive motor and an associated rotation drive mechanism operably connected to the spindle to rotate it; a spindle feed drive includes a feed motor and an associated feed drive mechanism operably connected to the spindle to feed it in a forward direction toward a workpiece and in a reverse direction retracting it away from the workpiece. Control is provided to start and stop the spindle rotation drive motor and the spindle feed motor independently. Control is provided for the spindle rotation drive to vary the rotational speed. Control is provided with the spindle feed drive to vary the rate of feed of the spindle. A sensor with the spindle rotation drive senses operational torque of the spindle. Another sensor with the spindle feed drive senses thrust force on the spindle and the associated cutter. A rotation sensor with the spindle rotation drive senses and monitors the spindle rotation. Another rotation sensor with the spindle feed drive senses and monitors the spindle feed drive rotation. A control circuit is operably connected to control rotation…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.