Hand-held power tool with a pneumatic percussion mechanism

Details Hand-held power tool with a pneumatic percussion mechanism Hand-held power tool with a pneumatic percussion mechanism

2008-02-06

2009-12-08

Nash, Brian D (Department: 3721)

Tool driving or impacting

Impacting devices

With means for rotating tool

C173S108000, C173S128000, C173S200000, C173S204000

Reexamination Certificate

active

07628221

ABSTRACT:
A pneumatic percussion mechanism for a hand-held power tool includes a percussion piston (23) displaceable in a guide tube (21) for applying impacts to an anvil (24), a driving member (22) reciprocating in the guide tube (21) for driving the percussion piston, and an air spring (25) for transmitting a driving torque from the driving member (22) to the percussion piston (23) and directly switchable on and off by the anvil (24).

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