EP 2623705 A4 20170419 - COMBINED DOWN-THE-HOLE HAMMER
Title (en)
COMBINED DOWN-THE-HOLE HAMMER
Title (de)
KOMBINIERTER BOHRHAMMER
Title (fr)
MARTEAU COMBINÉ DE FOND DE TROU
Publication
Application
Priority
- CN 201020550979 U 20100930
- CN 201020550973 U 20100930
- CN 201020550985 U 20100930
- CN 201010298875 A 20100930
- CN 201010298838 A 20100930
- CN 2011076226 W 20110623
Abstract (en)
[origin: EP2623705A1] A combined down-the-hole hammer comprises a coupler (1), a bracket (3), plurality of impactors (4), a gas distributor (2). The coupler is configured to connect with a drill rod (5) and is internally provided with a first gas passage (10). plurality of impactors (4) are installed on the bracket (3), each of which is individually provided with a second gas passage (40), and an impact drill bit (45) of each of the impactors (4) can rotate around the axis per se. The gas distributor (2) is provided between the coupler (1) and the bracket (3). The gas distributor (2) is provided with a gas collection chamber (21) communicated with the fist gas passage (10) and a plurality of gas-distributing paths (22) communicating the gas collection chamber (21) with the second gas passage of each of the impactors (4). The combined down-the-hole hammer has the following advantages: low cost, rational structure, easy maintenance, convenient assembly/disassembly, reliable seal, and high efficiency of energy utilization and boring.
IPC 8 full level
CPC (source: EP KR)
E21B 4/06 (2013.01 - KR); E21B 4/14 (2013.01 - EP); E21B 4/16 (2013.01 - EP)
Citation (search report)
- [XI] DE 3024218 A1 19820121 - HYDROC GMBH [DE]
- [XI] FR 2713276 A1 19950609 - BONIFACE ANDRE [FR]
- See references of WO 2012041084A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2623705 A1 20130807; EP 2623705 A4 20170419; EP 2623705 B1 20191016; JP 2013538957 A 20131017; JP 5948333 B2 20160706; KR 101746822 B1 20170613; KR 20130110175 A 20131008; WO 2012041084 A1 20120405
DOCDB simple family (application)
EP 11827980 A 20110623; CN 2011076226 W 20110623; JP 2013530541 A 20110623; KR 20137011112 A 20110623