Extender assembly for core drill

Details Extender assembly for core drill Extender assembly for core drill

B - Operations, Transporting

23

B

B23B 51/00 (2006.01) B23B 45/00 (2006.01) B23B 51/12 (2006.01) B28D 1/04 (2006.01)

Patent

CA 2399912

A core drill extender apparatus comprises an extender tube that is adapted to make a screw connection to a driver, and a connector assembly releasably mounted in the front end of the tube for connecting the extender tube to a core drill. The connector assembly comprises a tapered mandrel having a threaded axial extension at its front end for making a screw connection to a core drill, and an expandable locking sleeve that surrounds and engages the outer surface of the mandrel. The sleeve is made so that moving it relative to the mandrel in the direction of increasing mandrel outer surface diameter will cause the sleeve to expand radially and into tight frictional engagement with the extender tube.

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