Tool driving or impacting – Impacting devices – With means for rotating tool
Patent
1993-10-29
1995-10-17
Rada, Rinaldi I.
Tool driving or impacting
Impacting devices
With means for rotating tool
173206, 173DIG3, E21C 112
Patent
active
054582059
ABSTRACT:
Liquid driven hammer machine with a machine housing (1) and a hammer piston (2) moveable to-and-fro in guides (4,5) in the machine housing. The guides are made with an intermediate section (6) and end sections (7,8) on either sides thereof. The slot between the intermediate section and the hammer piston is less than, preferably one half of, the slot between the end section and the hammer piston at the end of the end section turned away from the intermediate section. The intermediate section has according to an advantageous embodiment an ax/al extension which is approximately one third of the length of the guide.
REFERENCES:
patent: 2108989 (1938-02-01), Mack
patent: 3307638 (1967-03-01), Kurt
patent: 4034817 (1977-07-01), Okada
patent: 4157121 (1979-06-01), Amtsberg et al.
patent: 4282937 (1981-08-01), Hibbard
patent: 4349075 (1982-09-01), Henriksson
Atlas Copco Rocktech AB
Rada Rinaldi I.
Stone Mark P.
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