Global Patent Index - EP 1492648 B2

EP 1492648 B2 20091021 - HYDRAULIC ROTARY-PERCUSSIVE HAMMER DRILL

Title (en)

HYDRAULIC ROTARY-PERCUSSIVE HAMMER DRILL

Title (de)

HYDRAULISCHER DREHENDER SCHLAGBOHRHAMMER

Title (fr)

MARTEAU PERFORATEUR HYDRAULIQUE ROTO-PERCUTANT

Publication

EP 1492648 B2 20091021 (FR)

Application

EP 03725300 A 20030318

Priority

  • FR 0300859 W 20030318
  • FR 0203402 A 20020319

Abstract (en)

[origin: WO03078107A1] The invention relates to a hydraulic rotary-percussive hammer drill (1) comprising a body (2) containing an alternating impact piston (4) which slides due to the effect of a main hydraulic feed circuit (22), said main circuit also being intended to cause an essentially annular stop piston (5) to slide in a cavity (3) of the body. The aforementioned stop piston comprises (i) a front face which is in contact with a shank (7) and which is intended to position said shank at a pre-determined distance from the impact piston and (ii) a rear face opposite a rear wall of the cavity. The invention is characterised in that, when the main circuit is stopped, an external hydraulic feed circuit (23) can introduce a pressurised fluid between the rear face of the stop piston and the rear wall of the cavity, such as to maintain a space between same. The inventive hammer drill is suitable for drilling installations.

IPC 8 full level

B25D 17/24 (2006.01); B25D 9/12 (2006.01); B25D 16/00 (2006.01); E21B 6/00 (2006.01)

CPC (source: EP KR US)

B25D 9/12 (2013.01 - EP KR US); B25D 16/00 (2013.01 - EP KR US); B25D 17/24 (2013.01 - KR); B25D 17/245 (2013.01 - EP US); E21B 6/00 (2013.01 - EP KR US)

Citation (opposition)

Opponent :

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR

DOCDB simple family (publication)

WO 03078107 A1 20030925; AT E343458 T1 20061115; AU 2003227845 A1 20030929; AU 2003227845 B2 20080403; BR 0308436 A 20050118; CA 2479055 A1 20030925; CA 2479055 C 20110510; CN 100333879 C 20070829; CN 1638924 A 20050713; DE 60309303 D1 20061207; DE 60309303 T2 20070201; DK 1492648 T3 20070226; EP 1492648 A1 20050105; EP 1492648 B1 20061025; EP 1492648 B2 20091021; ES 2274231 T3 20070516; FR 2837523 A1 20030926; FR 2837523 B1 20040514; IL 163897 A0 20051218; IL 163897 A 20081126; JP 2005527388 A 20050915; KR 20040091661 A 20041028; NO 20044415 L 20041018; PT 1492648 E 20070228; US 2005016774 A1 20050127; US 7234548 B2 20070626; ZA 200406502 B 20060628

DOCDB simple family (application)

FR 0300859 W 20030318; AT 03725300 T 20030318; AU 2003227845 A 20030318; BR 0308436 A 20030318; CA 2479055 A 20030318; CN 03804472 A 20030318; DE 60309303 T 20030318; DK 03725300 T 20030318; EP 03725300 A 20030318; ES 03725300 T 20030318; FR 0203402 A 20020319; IL 16389703 A 20030318; IL 16389704 A 20040902; JP 2003576150 A 20030318; KR 20047013229 A 20030318; NO 20044415 A 20041018; PT 03725300 T 20030318; US 50405504 A 20040921; ZA 200406502 A 20040816