EP 2257687 A1 20101208 - DRILLING UNIT, METHOD FOR SLOT DRILLING AND SLOTTING DEVICE
Title (en)
DRILLING UNIT, METHOD FOR SLOT DRILLING AND SLOTTING DEVICE
Title (de)
BOHREINHEIT, VERFAHREN ZUM LANGLOCHBOHREN UND SCHLITZVORRICHTUNG
Title (fr)
UNITE DE FORAGE, PROCEDE DE PERÇAGE DE RAINURE ET DISPOSITIF DE RAINURAGE
Publication
Application
Priority
FI 2008050161 W 20080403
Abstract (en)
[origin: WO2009122001A1] A slotting device (100) to be used with a rock drilling apparatus (1) to drill closely together a plurality of parallel intersecting holes so as to form a slot in a brittle material, such as rock, masonry or concrete. The slotting device (100) includes a guide portion (110) connected to a body portion (120) with at least one strut (130). The guide portion (110) is disposed in a previously drilled hole, and the body portion (120) and a rotary percussion tool (7) mutually define a variable volume chamber (140) that contains flushing fluid that damps transmission of impact stress waves from a percussion device (4) of the drilling apparatus (1) to the slotting device (100).
IPC 8 full level
E21B 19/24 (2006.01); E21B 7/28 (2006.01); E21C 25/58 (2006.01)
CPC (source: EP US)
E21B 19/24 (2013.01 - EP US); E21C 25/58 (2013.01 - EP US)
Citation (search report)
See references of WO 2009122001A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA MK RS
DOCDB simple family (publication)
WO 2009122001 A1 20091008; AU 2008353952 A1 20091008; AU 2008353952 B2 20111124; CA 2714983 A1 20091008; CA 2714983 C 20120828; CN 101981269 A 20110223; EP 2257687 A1 20101208; JP 2011516760 A 20110526; JP 5167404 B2 20130321; US 2011017513 A1 20110127; ZA 201006643 B 20110629
DOCDB simple family (application)
FI 2008050161 W 20080403; AU 2008353952 A 20080403; CA 2714983 A 20080403; CN 200880128399 A 20080403; EP 08736810 A 20080403; JP 2011502404 A 20080403; US 93579308 A 20080403; ZA 201006643 A 20100916