Interchangeable holder for hollow drills

Details Interchangeable holder for hollow drills Interchangeable holder for hollow drills

2006-11-14

2006-11-14

Howell, Daniel W. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having axial, core-receiving central portion

C408S23900A

Reexamination Certificate

active

07134815

ABSTRACT:
An interchangeable holder (1) for hollow drills, having a support element (4) for receiving a base end (11) of a drill rod (10) of the hollow drill on a front face, and a holding device (12) for a handle of the support element (4) on associated recesses (15) that are configured in the wall of the drill rod (10) on its base end (11). To provide a universal interchangeable holder on which drill rods with different diameters can be mounted, the support element (4) has a front-face annular rest zone (9) that receives drill rods (10; 10′; 10″) with different diameters. A locking device (24), together with the holding device (12), is effective across the width of the annular rest zone (9) in order to maintain the respective drill rod (10; 10′; 10″) placed on the rest zone (9) and held by the holding device (12) locked in a center position.

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