| 摘要 |
A manually operatable rotary tool (1) for medical or veterinary use comprises an elongate barrel (2) terminating at one end in a nose and adapted, in use, to bear on a nail or bone to be sampled or treated. An external sleeve (6) is co-axial with, and surrounds, an upper portion of the barrel and is connected to a rotatable spindle (9) located internally and co-axially of the barrel. A cutting head, e.g. a drill bit or burr, is attached, to the end of the spindle and the spindle and cutting head are telescopically displaceable, within limits, with respect to the barrel when the sleeve is rotated. <IMAGE> |
