Cutting by use of rotating axially moving tool – Processes – Bit detachable
Patent
1984-03-12
1987-04-14
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
Processes
Bit detachable
175 58, 175330, 175404, 279 20, 408 68, 408207, 408239R, B23B 3500
Patent
active
046574450
ABSTRACT:
Disclosed is an improved core drill and a method of detachably coupling the same to a power driving unit to expedite the removal of a core therefrom. This is achieved by equipping the rear end of the drill stem with a fixedly attached externally threaded bushing. A coupling sleeve has internal threads at either end matable respectively with the bushing threads and the threaded drive shank of a power driving unit. This sleeve and the core drill are readily detached as a unit from the power drive thereby permitting the rapid removal of the core from the rear end of the drill rather than past the cutting ring at its front end.
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Webb Glenn L.
Weidenfeld Gil
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