Pneumatic impact tool and piston for a pneumatic impact tool

Details Pneumatic impact tool and piston for a pneumatic impact tool Pneumatic impact tool and piston for a pneumatic impact tool

1994-03-22

1996-01-23

Smith, Scott A.

Tool driving or impacting

Drive controlled by relative axial movement of tool

Drive motor controlled

173 91, 173135, 173211, 173169, B25D 1706, B25D 1724

Patent

active

054858879

ABSTRACT:
The impact tool is provided with a piston (15) oscillating within a cylinder (10). For selecting, with which piston impact surface the piston (15) impacts on the head (7) of a tool holder (2) and accordingly for the selection whether the impact tool generates forward or rearward strikes, respectively, the cylinder (10) is displaced pneumatically between two positions. The displacement occurs depending on the position of a switch (21). This changing of the impact direction is simple and makes it possible to fix the tool holder in the housing (1) making the impact tool sturdy.

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