DEVICE FOR DRILLING A CONICAL ZONE IN A HOLE

DEVICE FOR DRILLING A CONICAL ZONE IN A HOLE

The present invention relates to a device for drilling a conical area in the innermost part of a previous drilled cylindrical hole. The invention provides a safe and durable fastening for screws and bolts. The device is suitable for drilling in concrete, rocks and other solid materials.

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1. Verfasser: FAANES, PER, °GE
Format: Patent
Sprache:eng ; spa
Schlagworte:
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
WORKING CEMENT, CLAY, OR STONE
WORKING STONE OR STONE-LIKE MATERIALS
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creator FAANES, PER, °GE
description The present invention relates to a device for drilling a conical area in the innermost part of a previous drilled cylindrical hole. The invention provides a safe and durable fastening for screws and bolts. The device is suitable for drilling in concrete, rocks and other solid materials.
format Patent
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language eng ; spa
recordid cdi_epo_espacenet_MXPA01012101A
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subjects BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
WORKING CEMENT, CLAY, OR STONE
WORKING STONE OR STONE-LIKE MATERIALS
title DEVICE FOR DRILLING A CONICAL ZONE IN A HOLE
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