Hydraulic impact tool

Details Hydraulic impact tool Hydraulic impact tool

1997-01-08

1999-04-13

Smith, Scott A.

Tool driving or impacting

Drive controlled by relative axial movement of tool

173204, 173206, 173 19, 173208, 91300, B25D 902

Patent

active

058934197

ABSTRACT:
A hydraulically driven hammer has a piston which contains metal piston rings on a constant diameter section. The housing has a plurality of axially spaced apart radial ports that extend through the housing into the bore. A valve supplies fluid to the ports to control reciprocation of the piston.

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