EP 1015727 A1 20000705 - DRILLING TOOL
Title (en)
DRILLING TOOL
Title (de)
BOHRWERKZEUG
Title (fr)
OUTIL DE PER AGE
Publication
Application
Priority
- DE 9801376 W 19980515
- DE 19722519 A 19970530
Abstract (en)
[origin: DE19722519A1] The invention relates to a drilling tool, especially a rock drill, comprising a drill head, a clamping stem and a helical stem situated in-between. The aim of the invention is to provide an economical drilling tool. To this end, the base element is a polygonal section which is provided with a helical cutting groove in the area of the helical stem.
IPC 1-7
IPC 8 full level
E21B 10/44 (2006.01)
CPC (source: EP US)
E21B 10/445 (2013.01 - EP US); Y10T 408/9097 (2015.01 - EP US)
Citation (search report)
See references of WO 9854435A1
Designated contracting state (EPC)
DE DK FR GB IT
DOCDB simple family (publication)
DE 19722519 A1 19981203; CN 1094168 C 20021113; CN 1257562 A 20000621; DE 59804344 D1 20020711; DK 1015727 T3 20020916; EP 1015727 A1 20000705; EP 1015727 B1 20020605; US 6213232 B1 20010410; WO 9854435 A1 19981203
DOCDB simple family (application)
DE 19722519 A 19970530; CN 98805477 A 19980515; DE 59804344 T 19980515; DE 9801376 W 19980515; DK 98933556 T 19980515; EP 98933556 A 19980515; US 42450299 A 19991124