Rock drill

Details Rock drill Rock drill

2005-06-28

2005-06-28

Howell, Daniel W. (Department: 3722)

Cutting by use of rotating axially moving tool

Tool or tool with support

Having peripherally spaced cutting edges

C175S394000, C175S415000, C175S420200

Reexamination Certificate

active

06910838

ABSTRACT:
A rock drill for rotary hammers is proposed in which a conveying helix (3) having main and secondary webs (6to9) is used. A one-piece carbide crown, with its wing-shaped main and secondary lips (24to27), is butt-welded to the conveying helix.

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