Global Patent Index - EP 2064033 A1

EP 2064033 A1 20090603 - HYDRAULIC IMPACT DEVICE WITH PRESSURE ACCUMULATOR

Title (en)

HYDRAULIC IMPACT DEVICE WITH PRESSURE ACCUMULATOR

Title (de)

HYDRAULISCHE SCHLAGVORRICHTUNG MIT DRUCKSPEICHER

Title (fr)

DISPOSITIF D'IMPACT HYDRAULIQUE DOTÉ D'UN ACCUMULATEUR À PRESSION

Publication

EP 2064033 A1 20090603 (EN)

Application

EP 07808828 A 20070919

Priority

  • SE 2007000819 W 20070919
  • SE 0601923 A 20060919

Abstract (en)

[origin: WO2008036019A1] A hydraulic impact device comprises a housing (10) with a cylinder (11) and a hammer piston (13) guided in the cylinder (11) and reciprocated by a hydraulic control system including a directional valve (18) and a pressure accumulator (19), wherein the pressure accumulator (19) comprises a pressure chamber (20) divided into two compartments (20a, 20b) by an elastic flexible membrane (21), and a movable membrane support (24) formed by a disc element (26) with a convex contact surface, and a spring (28) acting both as a biasing means and a guide means for the disc element (26), said spring (28) is positively located relative to the disc element (26) by a circular recess (30) in the latter and by a tubular neck portion (29) on the housing (10).

IPC 8 full level

B25D 9/14 (2006.01); E21B 1/26 (2006.01); F15B 1/14 (2006.01); F15B 1/20 (2006.01)

CPC (source: EP SE)

B25D 9/145 (2013.01 - EP); E21B 1/12 (2020.05 - SE); F15B 1/14 (2013.01 - SE); B25D 2250/371 (2013.01 - EP); F15B 2201/21 (2013.01 - EP); F15B 2201/3151 (2013.01 - EP); F15B 2201/3158 (2013.01 - EP)

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)

WO 2008036019 A1 20080327; EP 2064033 A1 20090603; EP 2064033 A4 20110511; EP 2064033 B1 20121219; ES 2398728 T3 20130321; SE 0601923 L 20080320; SE 530391 C2 20080520

DOCDB simple family (application)

SE 2007000819 W 20070919; EP 07808828 A 20070919; ES 07808828 T 20070919; SE 0601923 A 20060919