Title (en)

TELESCOPIC FEED BEAM FOR ROCK DRILL AND METHOD OF MEASURING ROCK DRILL TRAVEL

Title (de)

TELESKOPISCHER ZUFUHRSTRAHL FÜR EINEN BOHRHAMMER UND VERFAHREN ZUM MESSEN DER BOHRHAMMERBEWEGUNG

Title (fr)

POUTRE DE GUIDAGE TELESCOPIQUE DE PERFORATRICE POUR ROCHES ET MESURE DE LA COURSE DE LA PERFORATRICE

Publication

EP 1601854 B1 20060802 (EN)

Application

EP 04713564 A 20040223

Priority

• FI 2004000083 W 20040223
• FI 20030264 A 20030221

Abstract (en)

[origin: WO2004074626A1] The invention relates to a telescopic feed beam for a rock drill and to a method of measuring a travel length. The pressure surface of a piston (11b) in a feed cylinder (11) of the feed beam is twice as large as the pressure surface of a piston (6b) in a feed extension cylinder (6). Furthermore, the feed beam comprises a flow indicator (19) for measuring the volume flow rate of hydraulic fluid fed and/or discharged, and thereby the travel length.

IPC 8 full level

E21B 19/086 (2006.01); E21B 7/02 (2006.01); E21B 15/04 (2006.01); E21B 45/00 (2006.01)

CPC (source: EP)

E21B 7/022 (2013.01); E21B 7/025 (2013.01); E21B 19/086 (2013.01); E21B 45/00 (2013.01)

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 2004074626 A1 20040902; AT E335120 T1 20060815; AU 2004213608 A1 20040902; AU 2004213608 B2 20081106; CA 2519676 A1 20040902; CA 2519676 C 20091229; CN 100360763 C 20080109; CN 1777733 A 20060524; DE 602004001765 D1 20060914; EP 1601854 A1 20051207; EP 1601854 B1 20060802; FI 114817 B 20041231; FI 20030264 A0 20030221; FI 20030264 A 20040822; NO 20054326 D0 20050920; NO 20054326 L 20051111; NO 327647 B1 20090907; ZA 200507635 B 20061227

DOCDB simple family (application)

FI 2004000083 W 20040223; AT 04713564 T 20040223; AU 2004213608 A 20040223; CA 2519676 A 20040223; CN 200480010635 A 20040223; DE 602004001765 T 20040223; EP 04713564 A 20040223; FI 20030264 A 20030221; NO 20054326 A 20050920; ZA 200507635 A 20050921