Tool driving or impacting – Impacting devices – With means to reciprocate tool
Reexamination Certificate
2006-10-17
2006-10-17
Smith, Scott A. (Department: 3721)
Tool driving or impacting
Impacting devices
With means to reciprocate tool
C173S117000, C173S122000, C173S201000, C123S0480AA
Reexamination Certificate
active
07121360
ABSTRACT:
A hand-held power tool includes a percussion mechanism (3) arranged in the tool housing (2), and a motor (4) for driving the percussion mechanism and connected therewith by a gear unit (5), with the percussion mechanism including an eccentric (6) a piston (7), and a connection rod (21; 41) connecting the eccentric with the driving piston (7) and having a first part (22; 42) connectable with the eccentric (6), a second part (23; 43) connectable with the drive piston (7) and telescopically displaceable relative to the first part (22; 42), and a spring for damping vibrations occurring during operation of the power tool and arranged between the first (22; 42) and second (23; 43) parts.
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Abelman ,Frayne & Schwab
Hilti Aktiengesellschaft
Smith Scott A.
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