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1. (WO1992009788) METHOD FOR SECURING AND ADJUSTING THE STRENGTH OF BLOW OF A HAMMER, APPLICATION OF A HAMMER IN TUNNEL DRILLING AND HAMMER
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1992/009788 International Application No.: PCT/FI1991/000361
Publication Date: 11.06.1992 International Filing Date: 29.11.1991
Chapter 2 Demand Filed: 26.06.1992
IPC:
B25D 9/26 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
25
HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; HANDLES FOR HAND IMPLEMENTS; WORKSHOP EQUIPMENT; MANIPULATORS
D
PERCUSSIVE TOOLS
9
Portable percussive tools with fluid-pressure drive, e.g. having several percussive tool bits operated simultaneously
14
Control devices for the reciprocating piston
26
Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof
Applicants:
ILOMÄKI, Valto [FI/FI]; FI
Inventors:
ILOMÄKI, Valto; FI
Agent:
NIEMINEN, Taisto; Patenttitoimisto T Nieminen OY Kehräsaari B SF-33200 Tampere, FI
Priority Data:
90590630.11.1990FI
Title (EN) METHOD FOR SECURING AND ADJUSTING THE STRENGTH OF BLOW OF A HAMMER, APPLICATION OF A HAMMER IN TUNNEL DRILLING AND HAMMER
(FR) PROCEDE DE REGLAGE DE LA FORCE DU COUP D'UN MARTEAU, ET MARTEAU DESTINE A LA CONSTRUCTION DE TUNNELS
Abstract:
(EN) A method for securing and adjusting the strength of blow in a hammer operated by compressive pressure medium, comprised of a working cylinder (7) with a to-and-fro moving percussion piston (6) and a head (2) striking blows on a drilling object and moving with respect to the working cylinder in direction with the blows. From the blow transmitting head (2) a firm connection is formed by means of an outer shell (3) with one of the circular chamber (20) walls, which can move by pressure with respect to each other and through moving these walls with respect to each other by means of pressure directed to said chamber (20) the effect of piston (6) stroke on spindle (22) can be adjusted.
(FR) Procédé de réglage de la force du coup d'un marteau actionné par un milieu de compression et constitué d'un cylindre moteur (7) comprenant un piston frappeur (6) animé d'un mouvement de va-et-vient, ainsi que d'une tête (2) destinée à frapper un élément de forage en se déplaçant de manière relative audit cylindre moteur. Une connexion solide est formée par une coquille externe (3) entre ladite tête (2) et l'une des parois de la chambre circulaire (20), lesdites parois étant aptes à se déplacer sous pression l'une par rapport à l'autre. On peut régler l'effet de frappe du piston (6) sur la broche (22) en appliquant une pression à ladite chambre (20) de sorte que lesdites parois se déplacent l'une par rapport à l'autre.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, PL, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CI, CM, GA, GN, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: Finnish (FI)
Also published as:
EP0558573US5427187AU1991089380