Reversible percussive action machine

Details Reversible percussive action machine Reversible percussive action machine

B - Operations, Transporting

23

B

121/22, 138/40.1

B23B 45/16 (2006.01) E21B 4/14 (2006.01)

Patent

CA 1257515

REVERSIBLE PERCUSSIVE ACTION MACHINE Abstract A reversible percussive action machine comprises a housing accommodating a hammer capable of reciprocating motions under the action of a working fluid under pressure, and a valving member with grooves movably connected to the hammer and provided with means for fixing it relative to the housing in two fluid distribution control positions, particularly one that makes the machine move forward and one that ensures the return travel of the machine. The means for fixing the valving member in a position for the forward travel of the machine is fashioned as an insert movable relative to the valving member and having projections received by the grooves of the valving member. The insert is enclosed by a shell with ports, this shell being secured between the housing and the valving member to be capable of axial displacement.

495913

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