Tool driving or impacting – Automatic control of power operated means – Drive means responsive to torque or speed condition
Reexamination Certificate
2005-07-02
2010-08-24
Rada, Rinaldi I. (Department: 3721)
Tool driving or impacting
Automatic control of power operated means
Drive means responsive to torque or speed condition
C173S115000
Reexamination Certificate
active
07779930
ABSTRACT:
The invention relates to a striking device (5) comprising a striking mechanism (8) which is driven by a pressure medium. Said device comprises a percussion piston (13) which can be displaced back and forth by means of a control device and a control valve which is embodied as a pressure shut-off valve (19) or as a stop valve, said control valve automatically stopping the striking mechanism if it exceeds a predetermined maximum value based on the working pressure controlling the inlet line, blocking the pressure line (3) or maintaining the control device in one of the and positions thereof. The inventive striking device also comprises a hydraulic catcher buffer which is used to brake the percussion piston when it exceeds a predetermined impact plane. According to the invention, the control valve must remain deactivated at least as long as the percussion piston is displaced on the hydraulic catcher buffer.
REFERENCES:
patent: 4899836 (1990-02-01), Vernot
patent: 4967553 (1990-11-01), Barthomeuf
patent: 5174387 (1992-12-01), Arndt
patent: 5667022 (1997-09-01), Gude
patent: 5860481 (1999-01-01), Prokop et al.
patent: 5893419 (1999-04-01), Hodges
patent: 6334495 (2002-01-01), Deimel et al.
patent: 6491114 (2002-12-01), Webel
patent: 6959967 (2005-11-01), Prokop
Autschbach Uwe
Fritz Karlheinz
Koch Reiner
Lohmann Stefan
Mellwig Markus
Atlas Copco Construction Tools GmbH
Chukwurah Nathaniel
Rada Rinaldi I.
Wilford Andrew
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