Tool driving or impacting – Passage in manipulating handle for drive motor motive fluid – Motive fluid control valve in handle passage
Reexamination Certificate
2011-03-01
2011-03-01
Durand, Paul R (Department: 3721)
Tool driving or impacting
Passage in manipulating handle for drive motor motive fluid
Motive fluid control valve in handle passage
C173S090000, C173S112000, C175S296000
Reexamination Certificate
active
07896100
ABSTRACT:
A valve device (V,4′) for controlling the movement in a machine housing (2) of a reciprocating percussion piston (3) of a percussion device (1) for a rock drilling machine with a first chamber (5) that can be pressurized for forward driving of the percussion piston (3) and a second chamber (8) that can be pressurized for back-driving of the percussion piston (3), wherein the valve device includes a to and fro movable valve element (20), the movement of which being controlled as a response to the position of a valve portion (V) of the percussion piston in a valve housing portion by periodically pressurizing a signal chamber (21) actuating the movement of the valve element over signal conduit means (22, 23, 24). Said signal conduit means includes at least two signal conduit portions (23, 24), which are arranged for essentially simultaneous pressurizing through co-operation between a corresponding number of valve control edges (25, 26) on the valve portion of the percussion piston and edges (34, 35) or control chambers in the machine housing. The invention also concerns a percussion device and a rock drilling machine.
REFERENCES:
patent: 3741316 (1973-06-01), Alajouanine
patent: 3774502 (1973-11-01), Arndt
patent: 4006665 (1977-02-01), Klemm
patent: 4179983 (1979-12-01), Wallace
patent: 4230019 (1980-10-01), Castejon Castan
patent: 4413687 (1983-11-01), Eklof
patent: 4494614 (1985-01-01), Eklof
patent: 4646854 (1987-03-01), Arndt et al.
patent: 4817737 (1989-04-01), Hamada et al.
patent: 4899836 (1990-02-01), Vernot
patent: 5022309 (1991-06-01), Campbell
patent: 5372196 (1994-12-01), Andersson
patent: 5520254 (1996-05-01), Weber
patent: 5653295 (1997-08-01), Juvonen et al.
patent: 5718297 (1998-02-01), Weber
patent: 5884713 (1999-03-01), Shinohara et al.
patent: 5979291 (1999-11-01), Juvonen
patent: 6371222 (2002-04-01), Andersson et al.
patent: 2002/0185285 (2002-12-01), Ahr et al.
patent: 2004/0144551 (2004-07-01), Koskimaki
patent: 2006/0169468 (2006-08-01), Koskimaki et al.
patent: 10237407 (2004-04-01), None
patent: 0739691 (1996-10-01), None
Atlas Copco Rock Drills AB
Durand Paul R
Stone Mark P.
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