EP 2032316 A2 20090311 - Percussion equipment driven by a pressurized incompressible fluid
Title (en)
Percussion equipment driven by a pressurized incompressible fluid
Title (de)
Durch eine unter Druck stehende unkomprimierbare Flüssigkeit angetriebene Schlagausrüstung
Title (fr)
Appareil à percussions mû par un fluide incompressible sous pression
Publication
Application
Priority
- FR 2007001082 W 20070627
- FR 0605764 A 20060627
Abstract (en)
[origin: WO2008000958A2] The equipment comprises a body (2) inside which there are a bore in which a tool (3) is slideably mounted and a stepped bore forming a cylinder for a stepped piston (1) which together with this bore delimits a top chamber (5) and a bottom chamber (4) which chambers are sequentially supplied with incompressible fluid under high pressure under the action of a directional control valve (6), a control device varying the stroke of the striking piston between a long stroke and a short stroke and vice versa. The control device comprises a cylinder into which there opens at least one port (14) which also opens into the cylinder of the striking piston (1), and a port (13) connected to the directional control valve and in which a spool (12) is mounted, a first face of which spool lies in a first chamber (17) constantly subjected to a determined pressure and the second face of which spool lies in a second chamber (21) connected to a braking chamber (10).
IPC 8 full level
B25D 9/14 (2006.01); B25D 9/18 (2006.01); B25D 9/26 (2006.01)
CPC (source: EP KR US)
B25D 9/00 (2013.01 - KR); B25D 9/14 (2013.01 - KR); B25D 9/145 (2013.01 - EP US); B25D 9/18 (2013.01 - EP KR US); B25D 9/26 (2013.01 - EP KR US); B25D 2217/0023 (2013.01 - EP US); B25D 2250/221 (2013.01 - EP US); Y10T 137/86493 (2015.04 - EP US)
Citation (search report)
See references of WO 2008000958A2
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
Designated extension state (EPC)
AL BA HR MK RS
DOCDB simple family (publication)
FR 2902684 A1 20071228; FR 2902684 B1 20100226; AU 2007264799 A1 20080103; BR PI0714073 A2 20121218; CA 2654547 A1 20080103; CN 101500761 A 20090805; CN 101500761 B 20120125; EP 2032316 A2 20090311; EP 2032316 B1 20130508; ES 2424361 T3 20131001; IL 195012 A0 20090803; KR 101383219 B1 20140409; KR 20090021349 A 20090303; NO 20090380 L 20090126; US 2009250234 A1 20091008; US 8151900 B2 20120410; WO 2008000958 A2 20080103; WO 2008000958 A3 20080221
DOCDB simple family (application)
FR 0605764 A 20060627; AU 2007264799 A 20070627; BR PI0714073 A 20070627; CA 2654547 A 20070627; CN 200780024154 A 20070627; EP 07803791 A 20070627; ES 07803791 T 20070627; FR 2007001082 W 20070627; IL 19501208 A 20081030; KR 20087030354 A 20070627; NO 20090380 A 20090126; US 22776807 A 20070627