EP 2173524 B1 20101020 - HYDRAULIC PICK
Title (en)
HYDRAULIC PICK
Title (de)
HYDRAULISCHER ABBAUHAMMER
Title (fr)
MARTEAU À VÉRIN HYDRAULIQUE
Publication
Application
Priority
- SK 2008000008 W 20080708
- SK 932007 A 20070709
Abstract (en)
[origin: WO2009008844A1] A piston rod (2) with a piston (21), against which a displaceable valve ring (23), a short, axially rigid striking pin (3), guided in a bush (24), and a pressure transformer piston (25) are set, is immovably placed in one part of the supporting housing (1). A working tool (4) is placed in the second part of the supporting housing (1) in a tool bush (27) protected on the outside by a lower sealing cover (29) to prevent corrosion. A gas chamber (45) is set up under the supporting housing (1), the pressure transformer piston (25) and the striking pin (3). A pressure transformer cylinder (43) and an equalizing chamber (44) are formed between the piston rod (2) and the pressure transformer piston (25). The striking pin (3) is driven by working fluid under pressure, which is distributed by a system of channels in the piston rod (2). The striking pin (3) is driven onto the working tool (4) in a striking action by high-pressure gas, which is pressurized in the gas chamber (45). The movement of the striking pin (3) is controlled by a switching element (20), fitted in the piston rod (2), and a valve ring (23), pushed onto the piston rod surface. It is assisted by the pressure transformer, which eliminates pressure peaks of the working fluid.
IPC 8 full level
B25D 9/04 (2006.01); B25D 9/14 (2006.01); B25D 9/20 (2006.01); B25D 9/26 (2006.01)
CPC (source: EP US)
B25D 9/04 (2013.01 - EP US); B25D 9/145 (2013.01 - EP US); B25D 9/20 (2013.01 - EP US); B25D 9/265 (2013.01 - EP US); B25D 2209/005 (2013.01 - EP US); B25D 2250/035 (2013.01 - EP US); B25D 2250/125 (2013.01 - EP US); B25D 2250/131 (2013.01 - EP US)
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
DOCDB simple family (publication)
WO 2009008844 A1 20090115; AT E485133 T1 20101115; DE 502008001610 D1 20101202; EP 2173524 A1 20100414; EP 2173524 B1 20101020; ES 2357333 T3 20110425; PL 2173524 T3 20110429; RU 2010103146 A 20110820; RU 2449882 C2 20120510; SK 932007 A3 20090205; US 2010193212 A1 20100805; US 8789617 B2 20140729
DOCDB simple family (application)
SK 2008000008 W 20080708; AT 08779510 T 20080708; DE 502008001610 T 20080708; EP 08779510 A 20080708; ES 08779510 T 20080708; PL 08779510 T 20080708; RU 2010103146 A 20080708; SK 932007 A 20070709; US 66856508 A 20080708