Percussion device, drilling machine including such a...

Details Percussion device, drilling machine including such a... Percussion device, drilling machine including such a...

2007-09-12

2011-12-06

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Processes

C173S135000, C173S138000, C173S206000, C173S208000, C091S277000, C091S278000, C091S293000, C091S294000, C091S298000, C251S026000, C251S028000, C251S031000, C137S625600, C137S625660

Reexamination Certificate

active

08069928

ABSTRACT:
A percussive device and method having, inside a machine housing (3), a reciprocally moveable percussive piston (2), the movement of which is controlled by a control valve (5), which is arranged to alternatively connect a chamber to a pressure source and to low pressure in dependence on a signal corresponding to the axial position of the percussive piston, and a valve (16) arranged to allow adjustment of the axial position of the percussive piston at which the signal is transmitted, by opening and blocking of a connection between one or more control channels (10, 11, 12, 13) and the control valve.

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patent: WO 2004/073932 (2004-09-01), None

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